All tools
The complete ByteTools catalog — 2000 free tools, organized by category.
- 2000 tools
- 25 categories
- 0 uploads
Image Tools
Image Compressor
Compress JPG, PNG and WebP images in your browser with an adjustable quality slider. See before/after file size and download the smaller image free.
Image Resizer
Resize images to exact pixel dimensions or by percentage with aspect-ratio lock. Free online image resizer that works privately in your browser.
Rotate Image
Rotate images 90 degrees left or right, or enter any custom angle. Free online image rotation tool that processes photos privately in your browser.
Flip Image
Flip or mirror any image horizontally or vertically in one click. Free online image flipper with instant preview — photos never leave your browser.
Watermark Image
Add a custom text watermark to any photo — set the text, font size, color, opacity and position on a 9-point grid. Free, no uploads, no logo stamps.
JPG to PNG Converter
Convert JPG or JPEG images to PNG format instantly in your browser. Batch convert multiple files at once and download each PNG — free, no uploads.
Convert to WebP
Convert JPG, PNG and AVIF images to WebP with an adjustable quality slider. Batch convert in your browser — smaller files, faster pages, no uploads.
WebP to JPG Converter
Convert WebP images to universally compatible JPG files with a quality slider. Batch convert in your browser — free, instant, and nothing is uploaded.
WebP to PNG Converter
Convert WebP images to lossless PNG format while preserving transparency. Batch convert multiple files in your browser — free and fully private.
JPG to AVIF Converter
Convert JPG images to next-generation AVIF format with adjustable quality. Cut file sizes up to 50% versus JPEG — free, in-browser, no uploads.
AVIF to JPG Converter
Convert AVIF images to universally compatible JPG format with a quality slider. Decode and convert locally in your browser — free and private.
HEIC to JPG Converter
Convert iPhone HEIC photos to universally compatible JPG in your browser. Private, free conversion with clear guidance if your browser lacks HEIC support.
GIF to PNG Converter
Convert GIF images to PNG format in your browser — extracts the first frame of animated GIFs as a lossless still. Free, instant and private.
ICO Converter (Favicon Generator)
Convert PNG or JPG images to a multi-size ICO favicon (16, 32 and 48 px in one file). Generate a valid favicon.ico in your browser — free, no uploads.
SVG to PNG Converter
Convert SVG vector files to PNG at any resolution you choose. Render crisp raster images from SVG in your browser — free, instant and private.
PNG to SVG Converter
Convert PNG to SVG online by tracing raster pixels into scalable vector shapes. Free browser-based vectorizer for logos, icons and pixel art.
Image Metadata Viewer
View image metadata and EXIF data online: camera make, model, date taken, ISO, exposure, GPS location, dimensions and file size — all private.
Image DPI Checker
Check the DPI of an image online in seconds. This DPI checker reads real PNG and JPEG density metadata and shows PPI plus print size at 300 and 150 DPI.
Change Image DPI
Change or increase the DPI of a PNG or JPEG online without losing quality. This DPI converter sets 72, 96, 150, 300, 600 or a custom value and downloads instantly.
Image Size Checker
Check image dimensions, file size, aspect ratio and megapixels online for one or many images at once. Fast, free and fully private in your browser.
Image to Base64 Converter
Convert an image to a Base64 data URL online. Get copy-ready HTML img tags and CSS background-image snippets. Free, instant and fully private.
Base64 to Image Converter
Convert a Base64 string back to an image online. Paste a data URL or raw Base64, preview instantly and download as PNG, JPG or the original format.
Blur Image
Blur an image online with an adjustable Gaussian blur slider. Preview the original and blurred photo side by side and download free — no upload needed.
Sharpen Image
Sharpen a blurry image online with an adjustable unsharp mask. Enhance edge detail in photos, compare before and after, and download free — no upload.
Brightness & Contrast Editor
Adjust image brightness and contrast online with live sliders. Fix dark or washed-out photos, preview changes instantly and download free — no upload.
Grayscale Image Filter
Convert an image to grayscale online. Turn photos black and white with an adjustable intensity slider, preview live and download free — no upload.
Sepia Image Filter
Apply a sepia filter to photos online for a warm vintage look. Adjust intensity with a slider, preview instantly and download free — no upload needed.
Invert Image Colors
Invert the colors of an image online to create a photo negative effect. Adjustable intensity, instant preview and free download — no upload required.
Color Picker from Image
Pick colors from any image online. Click a photo to get exact HEX, RGB and HSL values with copy buttons and a history of recent picks — free and private.
Image Cropper
Crop images online to an exact rectangle with pixel-precise x, y, width and height inputs or aspect-ratio presets. Free, private and browser-based.
Circle Crop Image
Crop an image into a circle with transparent corners and an optional border. Perfect round avatars and profile pictures, all in your browser.
Add Border to Image
Add a solid border or frame around any image with a custom width and color. Free, private, browser-based photo framing with instant preview.
Round Image Corners
Round the corners of any image with an adjustable radius and export a transparent PNG. Free, private, browser-based corner rounding tool.
Pixelate Image
Pixelate an image with an adjustable block size to blur faces, hide details or create retro pixel art. Free, private, browser-based pixelation.
Image Color Tint
Apply a color tint or overlay to any image at adjustable strength. Blend a chosen color over your photo online, privately in your browser.
Photo to Sketch
Turn a photo into a pencil sketch with an adjustable intensity. Free, private, browser-based photo-to-drawing converter using a dodge blend.
Add Noise to Image
Add adjustable random noise or film grain to an image, in monochrome or color. Free, private, browser-based grain generator with live preview.
Vignette Image
Add a dark or light vignette around the edges of a photo with adjustable size and strength. Free, private, browser-based vignette tool.
Image Threshold
Convert an image to pure black and white with an adjustable luminance threshold. Free, private, browser-based binarize tool with live preview.
Posterize Image
Posterize an image by reducing it to a limited number of color levels per channel. Free, private, browser-based color-banding poster effect.
Duotone Image
Create a duotone image by mapping shadows and highlights to two chosen colors. Free, private, browser-based duotone effect with live preview.
Gradient Map
Apply a Photoshop-style gradient map online. Map each pixel's brightness to a custom color gradient for cinematic color grading and duotone-style looks.
PNG to JPG Converter
Convert PNG to JPG online with an adjustable quality slider and a background color for transparent areas. Free, private, in-browser conversion.
SVG to JPG Converter
Convert SVG to JPG online at any resolution. Choose the output size, background color and JPEG quality — rendered privately in your browser.
AVIF to PNG Converter
Convert AVIF images to lossless PNG online, keeping transparency intact. Free, private, browser-based — no upload, no quality loss on export.
Favicon Generator
Generate a complete favicon pack from one image: multi-size favicon.ico, 16–512 px PNGs, apple-touch-icon and ready-to-paste HTML link tags.
Compress Image to Size (KB)
Compress a JPG, PNG or WebP to an exact file size in KB — 20KB, 50KB, 100KB, 200KB presets for online forms. Free and 100% in-browser.
Bulk Image Resizer
Resize up to 30 images at once by width, height, percentage or exact dimensions. Batch photo resizing that runs entirely in your browser.
Bulk Image Compressor
Compress up to 30 images at once with one quality setting. See per-file and total savings, then download all — private, in-browser batch compression.
Resize Image in CM
Resize an image to exact centimeters, millimeters or inches at a chosen DPI. Writes real print density metadata so photo software prints it true to size.
Passport Photo Maker
Make passport, visa and ID photos online: 35×45 mm, US 2×2 inch and more at 300 DPI, with drag positioning and a printable 4×6 sheet. Free and private.
Signature Resizer
Resize a signature photo to exact pixel dimensions and a KB limit for online applications. Auto-crops the signature and cleans the background locally.
Remove EXIF Data from Photo
See the EXIF metadata hidden in a photo — camera, date, GPS location — then strip all of it before sharing. 100% local, nothing is uploaded.
Aspect Ratio Calculator
Calculate an image's aspect ratio from width and height, and scale to new dimensions without distortion. Includes 16:9, 4:3 and social presets.
Social Media Image Resizer
Resize photos to exact Instagram, Facebook, X, LinkedIn, YouTube and Pinterest dimensions with smart crop and a draggable focal point. Free and private.
Add Text to Image
Add text to any image online: pick a font, size, color and outline, drag the caption into place and download the result. Free and private.
Meme Generator
Make a meme online free: add classic top and bottom captions in Impact style with automatic line wrapping and sizing, then download as PNG or JPG.
Photo Collage Maker
Combine photos into one image online. Pick a 2x2, 3x3, big-plus-small or strip layout, adjust gap, background and rounded corners, then download.
Merge Images
Join two or more images side by side or stacked vertically. Auto-match sizes, set gap and background, and download the combined picture free.
Split Image into Parts
Split an image into equal parts online. Choose rows and columns up to 12x12, preview every tile and download them individually or all at once.
Instagram Grid Maker
Split a photo into a 3x3, 3x2 or 3x1 Instagram grid. Tiles are numbered in the correct posting order so your profile reassembles the image.
Sprite Sheet Generator
Pack icons or animation frames into one sprite sheet PNG and get matching CSS background-position classes or a JSON frame map, all in the browser.
Blur Part of an Image
Blur, pixelate or black out any part of a picture. Drag rectangles over faces, plates or private text and download the censored image — no upload.
Make Image Background Transparent
Remove a solid background from an image and make it transparent. Click to pick the color, tune tolerance and feathering, download a clean PNG.
Replace Color in Image
Swap one color for another in any image. Click to pick the source color, choose a new one, and shading is preserved so the result looks natural.
Image Opacity Changer
Change the opacity of an image from 0 to 100% and export a semi-transparent PNG, or flatten it onto a solid color. Free, fast and private.
Add Shadow to Image
Add a soft drop shadow to any image or PNG cut-out. Control offset, blur, color and opacity, round the corners, and export with transparency.
Screenshot Beautifier
Turn plain screenshots into share-ready images: gradient backgrounds, padding, rounded corners, drop shadow and a macOS-style window bar.
Halftone Effect Generator
Turn any photo into a classic halftone dot pattern online. Choose dot size and screen angle, or a CMYK color mode, all processed privately in your browser.
Dither Image
Apply Floyd-Steinberg, Atkinson or ordered Bayer dithering to any image online. 1-bit, grayscale or color levels for a retro, e-ink or pixel-art look.
Emboss Image Effect
Apply an emboss effect to any photo online. Adjustable strength and light direction turn edges into a raised 3D relief — free, private, in your browser.
Edge Detection
Run Sobel edge detection on any image online. Adjustable threshold and invert mode turn photos into clean line art — free and fully in-browser.
Oil Painting Effect
Turn a photo into an oil painting online with adjustable brush radius and detail levels. A real algorithmic paint filter that runs privately in your browser.
Hue & Saturation Adjuster
Shift hue, boost or mute saturation and tune lightness of any image online. Live preview, PNG export, and 100% in-browser processing with no upload.
Gamma Correction
Apply gamma correction to any image online. Brighten shadows or deepen midtones with the standard power-law curve and compare before and after live.
Image Upscaler (2x / 4x)
Enlarge an image 2x or 4x online with high-quality stepped resampling and optional sharpening. Fast, free and 100% private — no upload, no AI servers.
Image Color Palette Extractor
Extract the dominant color palette from any image online. Median-cut analysis returns 2–12 colors with HEX, RGB and HSL codes plus copyable CSS variables.
Image Histogram Viewer
View the RGB and luminance histogram of any image online. See exposure, mean, median and clipping percentages instantly — private, in-browser analysis.
Image to ASCII Art
Convert any image into ASCII art online. Choose width, character set and inversion, then copy the text or download it as a .txt file or rendered PNG.
Image Difference Checker
Compare two images pixel by pixel online. Get the exact count and percentage of differing pixels plus a visual overlay highlighting every changed region.
Placeholder Image Generator
Generate placeholder images at any size online — solid, gradient or checkerboard with the dimensions as text. Download PNG or copy a data URI for markup.
Image Channel Splitter
Split any photo into its red, green and blue channels, CMYK printing plates or the HSL lightness layer, and download each separation as a PNG.
Image Channel Mixer
Rebuild each output channel from red, green and blue with Photoshop-style sliders, or mix your own black and white conversion. Free and fully in-browser.
Image Levels Adjustment
Adjust image levels online with input black and white points, midtone gamma and an output range, guided by a live histogram and one-click auto levels.
Image Curves Editor
Drag a tone curve to reshape shadows, midtones and highlights, per channel or all at once, with S-curve, film fade and cross-process presets built in.
Histogram Equalization Tool
Equalize an image histogram online to rescue flat, hazy or underexposed photos, with an adjustable strength slider and before and after histograms.
Auto White Balance
Remove an orange, blue or green colour cast from a photo automatically using grey world or white patch estimation, with adjustable correction strength.
Image Color Temperature Adjuster
Warm or cool any photo by Kelvin value, from 1000 K candlelight to 40000 K deep shade, with a green-magenta tint slider and a preserve-luminance option.
Alpha Channel Extractor
Extract the alpha channel of a PNG as a grayscale mask, see how much of the image is transparent, and invert or threshold the matte before downloading.
Add Background to Transparent PNG
Add a solid colour, gradient or checkerboard background to a transparent PNG and export it as an opaque PNG or JPG, entirely inside your browser.
Sticker Outline Maker
Add a die-cut sticker outline to any transparent PNG, with adjustable width and colour, a second offset border and a full drop shadow. Free in-browser.
Average Color of an Image
Find the average colour of any image as HEX, RGB and HSL, with a gamma-correct mean, a per-channel median and a grid of per-region averages.
Image Color Counter
Count how many unique colours an image contains, see the most common ones with percentages, and check whether it fits a 256-colour PNG-8 or GIF palette.
Trim Whitespace from Image
Automatically crop white, black, transparent or custom-coloured borders from an image, with a tolerance slider for JPEG edges and optional padding.
Image Format Checker
Identify what an image file really is from its magic bytes, then decode the header for dimensions, bit depth, subsampling and encoding mode.
PNG Chunk Viewer
Break a PNG into its chunks and see each one's length, CRC-32 result and decoded contents, plus how many bytes metadata is really costing you.
JPEG Quality Checker
Estimate the 1-100 quality a JPEG was saved at by reading its quantization tables, plus chroma subsampling, encoding mode and bits per pixel.
ICC Color Profile Checker
Check whether a JPEG or PNG carries an embedded ICC color profile, read its header and tag table, and download the raw .icc file in one click.
Fix Photo Rotation (EXIF)
Fix photos that appear sideways by writing the EXIF orientation permanently into the pixels, so the picture looks the same in every app and browser.
Image Format Comparison
Re-encode one photo as JPEG, WebP and AVIF at several quality settings, then compare file size and PSNR side by side to pick the smallest usable file.
Seamless Pattern Generator
Generate tileable background patterns — stripes, dots, grids, chevrons and more — with two-color controls, then export a PNG tile plus ready-made CSS.
Noise Texture Generator
Generate seeded noise textures — white noise, smooth value noise, fractal fBm and transparent film grain — with full control and one-click PNG export.
Mesh Gradient Generator
Create soft multi-color mesh gradient backgrounds with seeded blob layouts, harmony-based palettes, blur and grain, exported as a PNG at any size.
Low Poly Image Generator
Turn any photo into low poly triangle artwork using edge-aware point sampling, Delaunay triangulation and a choice of flat or blended triangle fills.
Colorblind Image Simulator
Simulate protanopia, deuteranopia, tritanopia and achromatopsia on any image, with a severity slider and reference swatches for accessibility checks.
Letter Avatar Generator
Create Gmail-style initial avatars from a list of names, with colors hashed from each name and text contrast picked automatically, exported as PNGs.
Sprite Sheet Slicer
Cut a sprite sheet back into individual PNG frames by rows and columns, fixed cell size, or auto-detected transparent gutters, with animation preview.
ICO to PNG Converter
Convert a Windows .ico or .cur file to PNG and pull out every size stored inside it, with transparency preserved on each one.
PNG to BMP Converter
Convert PNG, JPG or WebP to an uncompressed Windows BMP, choosing 24-bit colour or a 32-bit bitmap that keeps the alpha channel.
PNG to ICNS Converter
Turn one square PNG into a macOS .icns icon file containing every size from 32 to 1024 pixels, built entirely in your browser.
PNG-24 to PNG-8 Converter
Shrink a 24-bit PNG by quantising it to a 256-colour indexed palette with optional Floyd-Steinberg dithering, and see the byte saving live.
GIF Frame Extractor
Split an animated GIF into individual PNG frames in your browser, with each frame's delay, disposal method and position listed.
Images to GIF Maker
Turn a set of photos or screenshots into an animated GIF in your browser, with frame rate, width, looping and fit controls.
BlurHash Generator
Generate a BlurHash string for any photo and preview exactly how the blurred placeholder will look, with adjustable component counts.
EXIF Date Editor
Change the date taken stored inside a JPEG by rewriting its EXIF DateTime, DateTimeOriginal and DateTimeDigitized fields in place.
Apply LUT to Image
Apply an Adobe .cube 3D LUT to a photo in your browser with trilinear interpolation and a strength slider to dial the grade back.
Open Graph Image Generator
Design a 1200 x 630 Open Graph or Twitter card image in your browser and copy the matching og:image and twitter:image meta tags.
App Icon Generator
Turn one square image into every iOS, Android and PWA app icon size, plus the Contents.json and web manifest icons array.
SVG Sprite Generator
Combine several SVG icons into one sprite file of symbols, with internal ids namespaced automatically and a ready-to-paste use snippet for each icon.
Before/After Image Slider Generator
Build a self-contained before and after image slider as a single HTML file, with both images inlined and no external assets to host.
Image Perspective Correction
Flatten a photo taken at an angle. Drag the four corners of a whiteboard, document or building and get a straight-on rectangle back.
Deskew Image
Straighten a crooked scan automatically. Detects the tilt of the text rows, rotates the page level and trims the blank corner triangles.
Reduce Image Noise
Clean grain and speckle out of a photo with a median or edge-preserving bilateral filter, applied to all channels or to colour noise only.
Tilt-Shift Photo Effect
Turn a photo into a miniature scene. Position a linear or oval focus band, blur everything outside it and boost saturation for the toy-model look.
Colour Splash Effect
Keep one colour and turn everything else black and white. Pick the hue by clicking the photo, then tune the tolerance and feather band.
Blend Two Images
Composite two images with multiply, screen, overlay, soft light, difference and seven more blend modes, plus opacity and alignment controls.
Glitch Effect Generator
Add RGB channel tears, sliced rows, corrupted blocks, scanlines and chromatic noise to any image, all driven by a seed you control.
Film Negative to Positive Converter
Turn a scanned colour negative into a positive. Samples the orange film base, cancels the mask and stretches each channel's histogram.
Duplicate Photo Finder
Find duplicate and near-duplicate photos in a folder. Each image gets a 64-bit perceptual hash, and close matches are grouped with previews.
Screenshot Annotator
Mark up a screenshot with arrows, boxes, ellipses, numbered step badges, highlighter blocks, text and pixelated regions, then export a flat PNG.
Lens Distortion Corrector
Straighten bent lines from wide-angle and action-camera lenses using the Brown–Conrady radial model, with a grid overlay for judging results.
Red Eye Remover
Remove flash red-eye from a photo. Drag a box over the eyes and only strongly red, saturated pixels are corrected — the catchlight survives.
PDF Tools
Merge PDF
Combine multiple PDF files into one document in your browser. Reorder files before merging, no upload, no watermark — free online PDF merger.
Split PDF
Split a PDF into separate single-page files or extract a page range in your browser. Free, private PDF splitter — no upload, no watermark.
Rotate PDF
Rotate all PDF pages or a specific range by 90, 180 or 270 degrees and save the result. Free in-browser PDF rotation with no upload.
Delete PDF Pages
Remove unwanted pages from a PDF by typing page numbers or ranges like 1,3,5-8. Free browser-based tool — your file is never uploaded.
Extract PDF Pages
Pull selected pages out of a PDF into a new document. Enter pages or ranges like 2,4,6-9 and download instantly — private, in-browser, free.
Rearrange PDF Pages
Reorder the pages of a PDF with simple up/down controls and download the reorganised file. Free, private and entirely in your browser.
Add Page Numbers to PDF
Stamp page numbers onto every PDF page. Choose position, starting number and font size, then download — free, no upload, no watermark.
Images to PDF
Convert JPG, PNG and WebP images into a single PDF. Choose A4, Letter or fit-to-image pages and margins — free, private, in-browser.
PDF to Images
Render every PDF page as a high-resolution PNG or JPG image at 1x–3x scale, preview thumbnails and download each page — free and private.
PDF Metadata Viewer
View, read and check PDF metadata online — title, author, subject, keywords, creator, producer and dates — extracted privately in your browser.
Compress PDF
Reduce PDF file size in your browser by re-encoding pages as JPEG at a quality you choose. Free PDF compressor with no upload and no watermark.
PDF to Text
Extract all the text from a PDF and copy it or save it as a .txt file. Layout-aware, free and processed entirely in your browser with no upload.
PDF to Markdown
Convert a PDF into clean Markdown with headings detected from font size, plus bullet lists and paragraphs. Free and processed entirely in your browser.
Watermark PDF
Stamp a text watermark such as DRAFT or CONFIDENTIAL across every PDF page with control over opacity, angle, size and colour. Free and fully in-browser.
Crop PDF
Trim white margins off every PDF page by entering top, right, bottom and left values in mm, points or inches. Free, private and entirely in-browser.
Resize PDF
Scale every page of a PDF to A4, US Letter, Legal, A3 or A5 with the aspect ratio preserved and content centred. Free, private, in-browser resizing.
PDF Page Counter
Count the pages in a PDF instantly and see every page's dimensions in points and millimetres. Free, private page counter that runs in your browser.
PDF Page Size Checker
Check whether a PDF is A4, US Letter, Legal or a mix, with exact dimensions in millimetres, inches and points for every size group. Free and private.
PDF Header & Footer
Add a text header and footer to every PDF page with page-number placeholders, alignment, margin and colour controls. Free, private and in-browser.
N-up PDF
Combine multiple PDF pages onto each sheet in a 2-up, 4-up, 6-up or 9-up grid to save paper. Free browser-based N-up tool with no upload.
Grayscale PDF
Convert a colour PDF to grayscale so it prints cleanly in black and white and uses no colour ink. Free, private conversion inside your browser.
Insert Blank PDF Pages
Add blank pages to a PDF before or after any page you choose, matching the existing page size. Free, private and processed entirely in your browser.
Duplicate PDF Pages
Repeat any PDF page or range as many times as you need, placed right after the original or at the end. Free, lossless and entirely in your browser.
Merge Alternate PDF Pages
Interleave two PDFs page by page to rebuild a double-sided scan from separate front and back files, with an optional reverse. Free and fully private.
PDF Form Filler
Fill in a PDF form in your browser. Every AcroForm text box, check box, dropdown and radio group becomes a real control, with optional flattening.
PDF Form Data Extractor
Pull the answers out of a filled PDF form. Lists every field name, type and value, and exports the lot as JSON, CSV or a plain name = value list.
Flatten PDF
Flatten a PDF two ways: bake AcroForm fields into the page, or rebuild every page as an image so fields, annotations and layers are gone for good.
PDF Metadata Editor
Edit the title, author, subject, keywords, creator, producer and dates of a PDF in your browser, or wipe every property with a single click.
PDF Bookmark Extractor
Read a PDF's bookmark outline and turn it into a contents page. Exports as plain text, a Markdown list, JSON or a nested HTML list with page numbers.
PDF Link Extractor
List every clickable link in a PDF with its page number and target. Separates external URLs from internal jumps and exports the whole table as CSV.
PDF Comment and Annotation Extractor
Pull sticky notes, highlights, underlines, strikeouts and text boxes out of a reviewed PDF with author, date and page, then export as CSV or Markdown.
PDF Image Extractor
Pull the original embedded pictures out of a PDF at full resolution. JPEG streams are saved untouched and compressed bitmaps are rebuilt as PNG files.
PDF Table to CSV
Turn a table inside a PDF into CSV. Text is clustered into rows by baseline and split into columns wherever the horizontal gap is wide enough.
PDF Word Counter
Count the words, characters, sentences and paragraphs in a PDF, with a per-page breakdown, the longest page and an estimated reading time.
PDF Font Checker
See which fonts a PDF uses and whether each one is embedded, subset or will be substituted by the printer, with type, encoding and a CSV export.
PDF to HTML Converter
Convert a PDF into clean semantic HTML. Larger lines become headings, bulleted and numbered lines become lists, and everything else becomes paragraphs.
Split PDF by Text
Search a PDF for a phrase or regular expression and split it wherever that text appears — the fast way to burst a batch of invoices or payslips apart.
PDF Booklet Maker
Turn any PDF into a fold-and-staple booklet. Pages are reordered for saddle-stitch printing with gutter and creep control, right in your browser.
Bates Numbering for PDF
Stamp sequential Bates numbers on a PDF with a custom prefix, suffix, padding and start number. Free, private and processed entirely in your browser.
Add Signature to PDF
Draw your signature with a mouse or finger, or upload a transparent PNG, then place it anywhere on a PDF page. Nothing is uploaded to a server.
Redact PDF
Real PDF redaction: drag black boxes over sensitive content and the pages are rebuilt as images, so the hidden text cannot be copied or recovered.
Compare Two PDFs
Find what changed between two PDF versions with a word-level diff and a pixel difference view, page by page. Both files stay in your browser.
Auto-Rotate PDF
Detects the text direction on every page and rotates each one the right way up, with a confidence score and a manual override per page.
Remove Blank Pages from PDF
Finds empty pages by measuring how much ink each one carries, ignores scanner speckle with a tolerance slider, and rebuilds the PDF without them.
Split PDF by File Size
Break a large PDF into parts that each fit under a size limit you choose. Every part is measured after saving, so it really fits.
Split PDF into Odd and Even Pages
Separate a PDF into odd and even pages in one click, with an option to reverse the even set — the fix for double-sided scans done in two passes.
Add Margins to PDF
Add white space around your pages by enlarging the page or shrinking the content, with margins in millimetres, inches or points.
Add Crop Marks to PDF
Build a print-ready PDF with trim marks, bleed and registration marks around your artwork, with adjustable mark length, offset and weight.
Invert PDF Colors
Turn a white PDF into a dark one for comfortable night reading, with a full invert or a hue-preserving mode that keeps photos looking natural.
Unlock PDF (Remove Password)
Open a password-protected PDF with the password you already have and save an unprotected copy, with no printing or copying restrictions left on it.
Split PDF Pages in Half
Cut scanned two-page spreads into single pages. Choose a vertical or horizontal cut, add overlap at the seam and keep the text sharp and selectable.
Combine PDF Pages Into One Page
Stack every page of a PDF onto one tall, wide or grid-shaped sheet, with your own gap, margin and background colour, without losing selectable text.
Add Bookmarks to PDF
Type a list of titles and page numbers and get a real, nested PDF outline in the sidebar of Acrobat, Preview and every browser — all done in your browser.
Split PDF by Bookmarks
Turn each chapter of a bookmarked PDF into its own file, named after its bookmark, with a choice of which outline level to split on.
Search Text in PDF
Search a PDF for a word, a whole word or a regular expression and see every hit with its page number and surrounding text, exportable as CSV.
PDF Ink Coverage Calculator
Estimate cyan, magenta, yellow and black coverage per page plus total area coverage, and flag pages that break the TAC limit for your paper stock.
PDF Accessibility Checker
Check a PDF for the structural basics of accessibility: tagging, a structure tree, a document language, a real title and alt text on every figure.
Extract Attachments From PDF
Find and download every file embedded inside a PDF, including e-invoice XML payloads and file-attachment annotations, straight from your browser.
PDF to One Long Image
Turn every page of a PDF into a single PNG or JPG — stacked, side by side or in a grid — with your own gap, background colour and resolution.
PDF Image Resolution Checker
Find every image placed in a PDF and see its effective DPI at the size it is actually printed, with low-resolution pictures flagged against your limits.
Trim White Margins From PDF
Detect the content on every page and crop away the empty white border, so scanned books and reports fill an e-reader screen instead of floating in space.
Change PDF Background Colour
Give a PDF a sepia, cream or custom paper colour for easier reading, with a vector mode that keeps text selectable and a multiply mode for scans.
Text Tools
Word Counter
Count words, characters, sentences, paragraphs and estimated reading time instantly. Free online word counter for essays, blogs and social media.
Case Converter
Convert text between uppercase, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and more. Free online case converter.
Character Counter
Count characters with and without spaces in real time and check limits for Twitter/X, Instagram captions, meta descriptions and SMS messages.
Remove Duplicate Lines
Delete duplicate lines from any list or text instantly. Case-insensitive matching, whitespace trimming and keep-first or keep-last options.
Remove Empty Lines
A free empty line remover that strips blank lines from text or code in one click. Optionally delete whitespace-only lines or collapse multiple blanks into one.
Remove Extra Spaces
Collapse double spaces into one, trim spaces at line ends and convert tabs to spaces. Clean messy whitespace from pasted text instantly.
Sort Lines
Sort lines of text alphabetically A to Z or Z to A, by length, numerically, or shuffle randomly. Options to ignore case and remove duplicates.
Reverse Text
Reverse text instantly: flip character order to create mirror text, reverse word order in sentences, or invert the order of lines in a list.
Text Compare
Compare two texts online free and highlight every difference. A private text comparison tool that finds matches and changes right in your browser.
Text Repeater
Repeat any text, word or emoji thousands of times with your chosen separator — new line, space, comma or custom. Copy or download the result.
Lorem Ipsum Generator
Generate classic lorem ipsum placeholder text by paragraphs, sentences or words. Copy dummy text for mockups, designs and layouts in one click.
Slug Generator
A free online slug maker that turns any title into a clean, SEO-friendly URL slug: lowercase, accents removed, words joined by hyphens. Live preview and copy.
Random Text Generator
Generate random strings with custom length and character sets, or random words from a built-in list. Great for test data, IDs and placeholders.
Find and Replace Text
Bulk find and replace text online with case-sensitive, whole-word and regex modes. See the replacement count and copy the cleaned result instantly.
Add Line Numbers to Text
Add sequential line numbers to any text online. Choose the start number, zero-padding and separator (dot, colon, paren or tab). Copy the result instantly.
Column Extractor
Extract one or more columns from CSV, TSV or delimited text online. Pick columns by number, choose the input delimiter and set the output separator.
Word Frequency Counter
Count how often each word appears in your text and rank them by frequency with counts and percentages. Options to lowercase and ignore common stop words.
Keyword Density Checker
Check keyword density for single words plus 2-word and 3-word phrases. See total words and each keyword's percentage to optimise on-page SEO content.
Readability Score Checker
Check readability with Flesch Reading Ease and Flesch–Kincaid Grade Level. See word, sentence and syllable counts plus a plain-English interpretation band.
Palindrome Checker
Check if a word, phrase or number is a palindrome. Ignores case, spaces and punctuation and shows the normalised text compared against its reverse.
Anagram Checker & Rearranger
Check if two words or phrases are anagrams, ignoring case and spaces, and list letter rearrangements of a short word. Fast, private and fully in-browser.
Invisible Character Remover
Remove invisible characters like zero-width spaces, joiners, BOMs, non-breaking spaces and control codes from text. See how many and which types were stripped.
Bionic Reading Converter
Convert text to bionic reading by bolding the first part of each word to guide your eyes and read faster. Adjustable fixation strength and copyable HTML output.
Morse Code Translator
Translate text to Morse code and decode Morse back to text instantly, with optional audio playback. Free, private, in-browser Morse code translator.
Text to Binary Converter
Convert text to 8-bit binary and decode binary back to text, with decimal and hex views. UTF-8 aware, free, private, in-browser binary translator.
NATO Phonetic Alphabet Converter
Convert text into the NATO phonetic alphabet (Alfa, Bravo, Charlie) to spell names and codes clearly over the phone. Free, private, in-browser tool.
Fancy Text Generator
Turn plain text into fancy Unicode fonts — bold, italic, script, monospace, bubble and more — for bios and social media. Free, private, in-browser.
Upside Down Text Generator
Flip your text upside down using Unicode characters so it reads reversed and rotated. Copy the flipped text for bios and fun posts. Free and private.
Glitch Text Generator
Create glitchy Zalgo text with combining diacritical marks and an adjustable intensity slider. Copy cursed, corrupted text for posts. Free and private.
Text Cipher
Encrypt and decrypt text with Caesar shift, ROT13 and Vigenère ciphers. Preserves case and punctuation. Free, private, in-browser cipher tool.
Text to ASCII Art Banner
Turn text into large ASCII art banners with a built-in block font. Copy the monospace output for READMEs, terminals and code comments. Free and private.
Text to Speech
Convert text to speech and read it aloud in your browser with voice, rate and pitch controls. Free, private, in-browser text-to-speech reader.
Speech to Text
Dictate with your microphone and convert speech to text live in your browser. Edit and copy the transcript. Free, private, in-browser voice typing.
Remove Line Breaks
Remove line breaks and newlines from text online. Replace breaks with a space or nothing, collapse extra spaces, and keep paragraph breaks if you want.
Strip HTML Tags
Remove all HTML tags and convert markup to clean plain text. Decode HTML entities and keep line breaks for block elements like paragraphs and headings.
Extract Emails
Extract all email addresses from any text or messy list online. Remove duplicates, sort alphabetically, count results, and export one per line or comma-separated.
Extract URLs
Extract all URLs and links from any text online. Detect http, https and www addresses, remove duplicates, sort them, and export one per line or comma-separated.
Extract Numbers
Extract all numbers from text online — integers and decimals, with optional negatives. List every value, count how many were found, and sum them automatically.
Remove Duplicate Words
Remove repeated words from text online while keeping the first occurrence and original order. Optional case-insensitive matching for tidy, deduplicated writing.
Text Truncate
Truncate text to a maximum number of characters or words online. Add a custom ellipsis and cut on whole words only for clean previews, excerpts, and meta text.
Word Wrap
Hard-wrap text at a chosen column width online. Break lines on spaces, optionally split long words, and keep paragraphs intact for email, code comments, and plain text.
Reverse Each Word
Reverse the letters inside each word while keeping word order and spacing intact. A fun, in-browser text tool for puzzles, obfuscation, and creative writing effects.
Sort Words
Sort the words in any text alphabetically online. Choose A–Z or Z–A, ignore case, remove duplicates, and output words space-separated or one per line.
Capitalize Sentences
Capitalize the first letter of every sentence online. Split on periods, question and exclamation marks, and optionally lowercase the rest for clean sentence case.
Remove Punctuation
Remove punctuation marks from text online. Strip periods, commas, quotes, brackets and symbols, keep the sets you choose, and optionally collapse the extra spaces.
Remove Accents
Remove accents and diacritics from text online — turn é into e, ñ into n, ü into u. Convert accented characters to plain ASCII while keeping the base letters.
Unique Words Extractor
Extract the unique words from any text online, listed alphabetically with a total count. Optional case-insensitive matching for clean vocabulary and keyword lists.
Add Prefix and Suffix to Text
Add a prefix and/or suffix to every line of your text at once. Great for building lists, HTML, CSV rows or code. Runs entirely in your browser.
Shuffle Lines
Randomly shuffle the order of lines in your text with a fair Fisher–Yates shuffle. Ideal for randomizing lists, names or questions. 100% in-browser.
Join Lines
Merge multiple lines of text into a single line using a comma, space or custom delimiter. Trim each line and skip blanks. Runs 100% in your browser.
Split Text Into Lines
Split text on a comma, semicolon, custom delimiter or every N characters into one item per line. Great for CSV and lists. 100% in your browser.
Tabs to Spaces Converter
Convert tab characters to a chosen number of spaces for consistent code indentation. Convert leading tabs only or all tabs. 100% in-browser.
Spaces to Tabs Converter
Convert runs of spaces into tab characters for compact, consistent indentation. Convert leading spaces only or all runs. Runs 100% in your browser.
Wrap Text in Quotes
Wrap each line or the whole text in single, double or custom quotes, with an optional trailing comma. Perfect for building code lists. 100% in-browser.
Pig Latin Translator
Translate English text into Pig Latin instantly, handling consonant clusters, vowels, punctuation and capitalization. Fun and 100% in-browser.
Extract Text Between
Extract every substring between a start and end delimiter, such as text inside brackets or tags. Lists each match with a count. 100% in-browser.
Line Counter
Count total lines, non-empty lines and unique lines in any text instantly. See all three stats at once for lists, logs and code. 100% in-browser.
Find Duplicate Lines
Find and list every line that appears more than once, with its exact occurrence count. Optional case-insensitive matching. Runs 100% in your browser.
Swap Case
Invert the case of every letter in your text — uppercase becomes lowercase and lowercase becomes uppercase. Instant and 100% in your browser.
Alternating Case Converter
Convert text to aLtErNaTiNg case (mocking SpongeBob style) with a choice of starting upper or lower. Fun and runs 100% in your browser.
Replace Smart Quotes
Convert curly smart quotes and long dashes to straight ASCII quotes and hyphens, or curl them back. Fixes copy-pasted text. 100% in-browser.
Markdown Stripper
Strip Markdown syntax from any text: headings, bold, links, code fences and list markers are removed, leaving clean plain text. 100% in-browser.
Text to HTML Converter
Convert plain text to clean HTML: special characters are escaped, paragraphs wrapped in <p> tags, newlines become <br>, and URLs can be auto-linked.
Text to Unicode Converter
Convert text to Unicode escapes and back: JavaScript \uXXXX, U+ code points or HTML &#x entities. Emoji-safe, bidirectional, runs in your browser.
Unicode Text Normalizer
Normalize Unicode text to NFC, NFD, NFKC or NFKD, compare code points before and after, and fix strings that look identical but don't match.
Punycode Converter
Convert internationalized domain names to Punycode and back — münchen.de to xn--mnchen-3ya.de — with RFC 3492 encoding done in your browser.
Braille Translator
Translate text to Grade 1 Unicode Braille and back. Letters, numbers and punctuation with proper number and capital signs — free and offline.
Leetspeak Translator
Convert text to leetspeak (1337) and decode it back. Basic and advanced substitution levels — a→4, e→3, s→$ — free and fully in your browser.
Letter to Number Converter (A1Z26)
Convert letters to numbers and back with the A1Z26 cipher: A=1 through Z=26. Custom separators, instant decoding — great for puzzles and escape rooms.
Words to Numbers Converter
Convert English number words like “seven hundred and eighty-nine thousand twelve” into digits instantly. Handles hyphens, “and”, decimals and negatives.
Emoji Remover
Remove all emoji from text in one click — smileys, flags, skin tones, ZWJ sequences and hidden variation selectors — with optional whitespace cleanup.
Acronym Generator
Build acronyms from any phrase — first letters, first syllable style, stopwords skipped — or reverse it and find phrases for an acronym from your own words.
Remove Special Characters
Strip special characters from text with a whitelist you control: keep letters, digits, spaces, punctuation or accents, plus any custom characters.
Remove Numbers from Text
Delete numbers from any text: strip every digit, remove whole numeric tokens like 1,234.56, or clear numbering at the start of lines. Runs in your browser.
Remove Line Numbers
Strip leading line numbers like “1.”, “2)” or “3:” from every line of pasted text or code. Auto-detects the numbering style, with a manual override.
Remove URLs from Text
Delete http, https, www and bare-domain links from any text. Keep Markdown link labels, swap URLs for a placeholder, and tidy leftover spaces automatically.
Comma Separated Values Generator
Turn a column of items into a comma separated list — or split one back into lines. Custom separators, quoting, dedupe and trim options, all in-browser.
Bullet Point Generator
Add bullet points to every line of your text: •, ‣, ✓, ★, arrows or a custom symbol, with indent control. Copy-paste-safe output for slides and posts.
Extract Phone Numbers
Pull every phone number out of pasted text — international formats, brackets, dots and spaces — then dedupe, normalize to digits and export the list.
Compare Two Lists
Paste two lists and instantly see items in both, only in list A, only in list B, and the combined set — with case-insensitive and trim options.
Letter Frequency Counter
Count how often each letter appears in your text, with percentage bars sorted by frequency. Great for cryptograms, ciphers, Wordle and language analysis.
Vowel and Consonant Counter
Count vowels and consonants in any text with a per-vowel breakdown (a, e, i, o, u), vowel-to-consonant ratio and an optional per-word table.
Sentence Splitter
Split paragraphs into one sentence per line without breaking on Mr., Dr., e.g. or decimal numbers. Smart abbreviation handling, copy or download output.
Word Scrambler
Scramble the letters inside every word with a fair Fisher–Yates shuffle. Keep first and last letters fixed for the typoglycemia effect, punctuation safe.
Hamming Distance Calculator
Count the positions where two equal-length strings, binary values or hex values differ. Shows a position-by-position diff, normalised distance and similarity.
Homoglyph Detector
Spot Cyrillic, Greek and other characters disguised as ASCII letters in domains, brand names and messages. Shows the position, script and code point of each one.
Full-Width to Half-Width Converter
Convert zenkaku full-width letters, digits and katakana to hankaku half-width and back, with dakuten composition and an NFKC normalisation mode.
Mojibake Fixer
Repair text where accents turned into é, ’ or †by re-decoding it as UTF-8. Runs up to three passes and shows the text after each one.
Zero-Width Text Encoder
Hide a secret message inside ordinary text using invisible zero-width characters, and decode it again. Shows exactly which code points are used.
Line Ending Converter (CRLF, LF, CR)
Detect and convert CRLF, LF and CR line endings. Counts each style, flags mixed files and rewrites the whole document to the one you choose.
Whitespace Visualizer
Draw every space, tab and line break as a visible glyph, and highlight non-breaking spaces, exotic spaces and zero-width characters with a per-type tally.
Emoji Counter
Count emoji the way people see them. Handles ZWJ sequences, skin tones and flags as single characters, and lists every emoji with its code points.
Keyboard Layout Converter
Recover text typed with the wrong keyboard layout active. Remaps between QWERTY, Dvorak, Colemak, AZERTY, QWERTZ and ЙЦУКЕН by key position.
Filename Sanitizer
Turn any text into a safe file name. Strips forbidden characters, folds accents, renames Windows reserved names and caps the length in UTF-8 bytes.
Text Entropy Calculator
Calculate Shannon entropy in bits per character, word or byte. Shows maximum entropy, redundancy and a full symbol probability table.
Levenshtein Distance Calculator
Calculate the edit distance between two strings, with the full dynamic-programming matrix, plus Damerau-Levenshtein, Jaro-Winkler and Dice scores.
Soundex & Metaphone Calculator
Encode names phonetically with American Soundex, Refined Soundex, NYSIIS and Metaphone, and compare two names side by side for a sound-alike verdict.
Markdown Table Formatter
Format and align Markdown tables so every column lines up. Fixes ragged rows, rebuilds the divider and sets left, centre or right alignment.
Markdown to BBCode Converter
Convert Markdown to BBCode for forums, or BBCode back to Markdown. Handles bold, italic, links, images, lists, quotes and code blocks.
Markdown Link Extractor
Extract every link from Markdown into a table of anchor text, URL and title. Splits internal from external and flags duplicates and empty anchors.
Text Column Aligner
Line up messy text into neat columns. Split on whitespace or a delimiter and align left, right, centre or on the decimal point.
Filter Lines (Grep for Text)
Keep or delete lines matching plain text, a wildcard or a regular expression. Includes invert match, whole word and extract-only-the-match modes.
Paragraph Sorter
Sort blocks of text separated by blank lines alphabetically, by length, by word count or randomly, keeping each paragraph's line breaks intact.
Indented Outline to JSON
Turn an indented outline or bullet list into nested JSON. Reads spaces, tabs and Markdown bullets, with custom key names and a flat depth option.
List to JSON Array Converter
Convert a list of lines into a JSON array of strings, numbers or objects, with trim, dedupe and pretty-print options plus a reverse mode.
Extractive Text Summarizer
Summarise long text by picking out its most significant sentences using Luhn's classic algorithm. Statistical only, and it runs in your browser.
Keyword Extractor (RAKE)
Pull the key phrases out of any text with the RAKE algorithm. Ranks multi-word phrases by co-occurrence score, entirely in your browser.
Date Extractor
Find every date in a block of text and normalise it to ISO 8601. Handles ISO, slash, dotted and written formats, and flags ambiguous ones.
SRT to VTT Converter
Convert SubRip subtitles to WebVTT for HTML5 video, or WebVTT back to SRT. Fixes the timestamp separator and adds the WEBVTT header.
Subtitle Timing Shifter
Resync SRT and VTT subtitles by shifting every timestamp, rescaling for a different frame rate, or fitting a correction from two known times.
Developer Tools
JSON Formatter
Format, beautify and minify JSON online with 2-space, 4-space or tab indentation. Sort keys alphabetically and catch syntax errors instantly — free and private.
JSON Validator
Free online JSON validator: validate JSON and find syntax errors with the exact line and column. See root type, key counts and depth — instant and 100% private.
XML Formatter
Format and beautify XML online with proper indentation, or minify it to a single line. Parse errors are reported clearly — free, fast and fully private.
XML Validator
Free online XML validator and syntax checker: verify your XML is well-formed and read the parser's exact error, plus element and attribute counts. Private.
HTML Formatter
Format HTML online with clean, consistent indentation. This HTML formatter handles void elements and preserves pre, script and style exactly. Free and private.
HTML Minifier
Minify HTML online: strip comments, collapse whitespace between tags and shrink page size. See bytes saved instantly. Free, private, runs in your browser.
CSS Formatter
Format and beautify CSS online: one declaration per line, tidy indentation, spaces after colons and support for nested at-rules. Free and 100% private.
CSS Minifier
Minify CSS online: remove comments and whitespace, drop trailing semicolons and shorten hex colors. See bytes and percent saved. Free, instant, private.
JavaScript Formatter
Beautify JavaScript online with token-aware indentation. Respects strings, template literals, regex and comments. A quick, private, in-browser JS formatter.
JavaScript Minifier
Minify JavaScript online safely: strip comments and collapse whitespace without renaming or rewriting code. See bytes saved. Free and 100% in-browser.
SQL Formatter
Format SQL online: uppercase keywords, new lines before SELECT, FROM, WHERE and JOIN, indented AND/OR conditions. One-line minify included. Free and private.
Base64 Encoder
Encode text or files to Base64 instantly in your browser. UTF-8 safe, with a URL-safe Base64 option, copy and download. Free online Base64 encoder.
Base64 Decoder
Decode Base64 to readable text or download it as a file. Handles URL-safe base64url and missing padding automatically. Free, private, in-browser decoder.
URL Encoder
Percent-encode text for URLs instantly. Switch between encodeURIComponent and encodeURI modes, see live output and copy the result. Free URL encoder.
URL Decoder
Decode percent-encoded URLs back to readable text instantly. Optional '+ as space' handling for query strings and clear errors for malformed input.
JWT Decoder
Decode JWT header and payload instantly, with human-readable iat/exp/nbf timestamps and an expiry badge. Client-side only — tokens never leave your browser.
MD5 Hash Generator
Generate MD5 hashes of text or files instantly in your browser. 32-character hex checksum with uppercase option and one-click copy. Free and private.
SHA-1 Hash Generator
Compute SHA-1 hashes of text or files in your browser using Web Crypto. 40-character hex digest with uppercase option and instant copy. Free and private.
SHA-256 Hash Generator
Generate SHA-256 hashes of text or files with the browser's Web Crypto API. 64-character hex digest, uppercase option, instant copy. Free and private.
SHA-512 Hash Generator
Compute SHA-512 hashes of text or files right in your browser. 128-character hex digest with uppercase option and one-click copy. Free, fast, private.
UUID Generator
Generate 1–100 cryptographically random UUID v4 identifiers at once. Uppercase and hyphen-less options, per-item copy and copy-all. Free UUID generator.
Random Buffer Generator
Generate cryptographically secure random bytes at any size. Output as hex, Base64 or a downloadable binary file — perfect for keys, salts, tokens and test data.
Regex Tester
Test regular expressions online with live match highlighting, capture groups and flag toggles (g, i, m, s, u, y). Free, instant and 100% private in your browser.
Cron Expression Parser
Parse a cron expression, read it in plain English and see the next 5 run times. Validates all five fields instantly — free, private and runs in your browser.
String Escape / Unescape
Escape or unescape strings for JavaScript and JSON literals: quotes, backslashes, newlines, tabs and \uXXXX. Two-way, free and fully private in your browser.
HTML Entity Encoder
Encode text to HTML entities online: named entities for &, <, >, quotes plus numeric entities for the rest. Choose named or numeric — free and 100% private.
HTML Entity Decoder
Decode HTML entities back to plain text: named entities, &#nnn; decimal and &#xhh; hex references. Free, instant and processed entirely in your browser.
JSON Escape / Unescape
Escape or unescape JSON string values online, or stringify text into a quoted JSON string. Handles quotes, backslashes, newlines and \uXXXX. Free and private.
ASCII Table
Interactive ASCII table with decimal, hex, octal, binary, character and description for codes 0-127, plus optional extended 128-255. Searchable, free and private.
HTTP Status Code Lookup
Search HTTP status codes from 100 to 599 with name, category and clear description. Filter by number or text — a fast, free, private in-browser reference.
MIME Type Lookup
Look up MIME types by file extension and vice-versa with a solid map of common formats. Search by extension or content type — free, instant and private.
User Agent Parser
Parse a User-Agent string into browser, rendering engine, operating system and device type. Prefilled with your own UA — free, instant and private in the browser.
URL Parser
Parse a URL into protocol, host, port, path, query parameters and hash. Handles relative URLs with a base and shows query params in a table. Free and private.
Query String Parser
Parse a query string into editable key/value rows and build one back from rows. Handles repeated keys and arrays, two-way and live. Free and private in-browser.
JWT Generator
Generate and sign a JWT with HS256 using the Web Crypto API. Edit the header and payload JSON, add a secret, and get a signed token. Free and 100% private.
Basic Auth Header Generator
Generate an HTTP Basic Authorization header from a username and password, and decode a Basic header back to credentials. Free, instant and private in your browser.
Base32 Encode
Encode text to Base32 (RFC 4648) online with optional = padding. UTF-8 safe, instant and 100% private — your text never leaves the browser.
Base32 Decode
Decode Base32 (RFC 4648) back to readable text online. Validates the input, ignores padding and spaces, and flags bad characters. Free and 100% private.
Hex to Decimal
Convert hexadecimal to decimal online. Accepts an optional 0x prefix and handles arbitrarily large values with BigInt — free, instant and 100% in-browser.
Decimal to Hex
Convert decimal to hexadecimal online with uppercase and 0x-prefix toggles. Handles very large numbers exactly using BigInt. Free, instant and private.
Binary to Decimal
Convert binary to decimal online. Validates that the input is only 0s and 1s and handles very long binary strings exactly with BigInt. Free and private.
Decimal to Binary
Convert decimal to binary online with optional nibble grouping for readability. Handles very large numbers exactly with BigInt. Free, instant and private.
Code Case Converter
Convert an identifier between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case and Title Case — all forms at once. Free and private.
JSON Minify
Minify JSON online: strip all whitespace to shrink payloads. Validates first and shows the error line and column, plus size before and after. Free and private.
JSON Sort Keys
Sort JSON object keys alphabetically online, recursively through nested objects, and pretty-print the result. Validates input first. Free, instant and private.
ULID Generator
Generate ULIDs online: 128-bit, lexicographically sortable IDs with a 48-bit timestamp and 80 bits of randomness. Create up to 50 at once. Free and private.
NanoID Generator
Generate NanoIDs online with a configurable size and alphabet. Uses crypto-secure, unbiased random sampling. Create up to 50 URL-safe IDs at once. Free and private.
CRC-32 Generator
Compute the CRC-32 (IEEE 802.3) checksum of text online and see it as hex and unsigned decimal. Great for integrity checks. Free, instant and 100% private.
JSON to Query String
Convert a flat JSON object to a URL query string online. Values are percent-encoded and arrays become repeated keys. Validates the JSON first. Free and private.
Query String to JSON
Convert a URL query string (or full URL) to a JSON object online. Repeated keys become arrays and values are decoded. Pretty-printed output. Free and private.
Binary to Text Converter
Convert binary code back to readable text online. Decodes space-separated or continuous 8-bit binary as UTF-8, so accents and emoji survive. Free and private.
Hex to Binary Converter
Convert hexadecimal to binary online with 4-bit or 8-bit grouping and zero-padding to 8, 16, 32 or 64 bits. Handles 0x prefixes and long values. No upload.
Binary to Hex Converter
Convert binary to hexadecimal online. Separators are ignored, bits are padded to whole nibbles, with uppercase and 0x prefix options. Fast, free and private.
Octal to Decimal Converter
Convert octal to decimal online and see the working — each digit multiplied by its power of 8 in a step-by-step table. Handles huge values exactly. Free tool.
Decimal to Octal Converter
Convert decimal to octal online with the repeated-division-by-8 working shown row by row. Exact for huge integers, negatives supported. Free and private.
Base64URL Encoder
Encode text to URL-safe Base64URL online — the JWT variant with - and _ instead of + and /, no padding. UTF-8 aware, instant and 100% in your browser.
Base64URL Decoder
Decode Base64URL (URL-safe Base64) back to text online. Restores missing = padding, validates the alphabet and decodes JWT segments. Free and 100% private.
Bitwise Calculator
Calculate AND, OR, XOR, NOT and bit shifts on 32-bit values online. Enter operands in any base and see results in decimal, hex, octal and binary at once.
Two's Complement Calculator
Convert signed decimals to two's complement binary and hex — and back — at 8, 16, 32 or 64 bits, with the invert-and-add-one steps shown. Free online tool.
IEEE 754 Floating Point Converter
Convert decimals to IEEE 754 single or double precision and back. See sign, exponent and mantissa bits, the exact stored value and the rounding error.
String Byte Size Calculator
Measure a string's size in UTF-8, UTF-16 and Latin-1 bytes, plus code units and Unicode code points. See why emoji count differently. Free online tool.
Hex Dump Viewer
View any file as a classic hex dump in your browser — offsets, hex bytes and an ASCII column, xxd style. Nothing is uploaded. Copy or download the dump.
Data URI Generator
Turn any file into a base64 data: URI in your browser, with MIME override and ready-to-paste HTML img, CSS url() and favicon snippets. Nothing is uploaded.
Cron Expression Generator
Build a cron expression from simple dropdowns — every N minutes, daily, weekly or monthly — with a plain-English summary. Free and 100% in your browser.
Chmod Calculator
Convert Linux file permissions between rwx checkboxes, octal values like 755 and symbolic strings — with setuid, setgid and sticky bit support. Free tool.
Umask Calculator
See what default file and directory permissions any umask value produces, in octal and symbolic form — or work backwards from the permissions you want.
cURL to Fetch Converter
Paste a curl command and get a ready-to-use JavaScript fetch() snippet plus an axios version — method, headers, body and auth mapped automatically, all offline.
HTTP Header Parser
Paste raw HTTP request or response headers and get a clean name/value table with explanations, directive breakdowns and duplicate detection. Free and private.
Cookie Parser
Decode a Cookie or Set-Cookie header into names, values and attributes — Domain, Path, Expires, SameSite — with security flags for missing attributes.
HTML to JSX Converter
Convert HTML to valid JSX for React: class to className, inline styles to objects, self-closed void tags and camelCased attributes — instantly, in your browser.
Markdown to HTML Converter
Convert Markdown to clean HTML with a live preview — headings, emphasis, links, lists, code blocks, tables and blockquotes. 100% in your browser.
HTML to Markdown Converter
Convert HTML to clean Markdown — headings, emphasis, links, images, nested lists, code blocks, tables and blockquotes — privately in your browser.
.gitignore Generator
Build a .gitignore file by selecting your stack — Node, Python, Java, Go, Rust, Unity, macOS, Windows, IDEs — merged, de-duplicated and ready to download.
Glob Pattern Tester
Test glob patterns like src/**/*.ts against a list of file paths and see matches instantly, with the compiled regex shown. Supports *, **, ?, [abc] and {a,b}.
Semantic Version Checker
Validate semantic versions, compare two versions with correct pre-release precedence, sort a whole list, and see the next major, minor and patch increments.
SVG Minifier
Minify SVG files in your browser: strip comments, metadata and editor junk, round coordinates, collapse whitespace — with a live preview and size savings.
Protobuf Decoder
Decode raw Protocol Buffers wire-format bytes without a .proto file. Paste hex or Base64 and read every field number, wire type and value.
CBOR Decoder
Decode CBOR (RFC 8949) from hex or Base64 into readable JSON and diagnostic notation, with tags, maps, indefinite lengths and half floats.
MessagePack Decoder
Decode MessagePack bytes from hex, Base64 or a dropped file into JSON, with a byte-offset breakdown showing every format byte the encoder used.
ZIP File Viewer
List everything inside a ZIP file without extracting it. See each entry's size, compression method, ratio, CRC-32 and modified date instantly.
File Signature (Magic Number) Identifier
Identify any file's real type from its magic number. Drop a file or paste its first bytes and see whether the extension matches the content.
UUID Decoder
Decode any UUID or GUID. Read its version and variant, and pull the creation timestamp out of version 1, 6 and 7 UUIDs instantly.
Snowflake ID Decoder
Turn a Twitter, X or Discord snowflake ID into a timestamp. Decode the worker, process and sequence bits, or build an ID for a date.
MongoDB ObjectId Decoder
Decode a MongoDB ObjectId into its timestamp, random value and counter, and build a boundary ObjectId for date-range _id queries.
CRC-16 Calculator
Calculate CRC-16 checksums in 12 variants including MODBUS, CCITT-FALSE, XMODEM and KERMIT, from text, hex bytes or a dropped file.
Adler-32 Checksum Calculator
Calculate the Adler-32 checksum used by zlib and PNG from text, hex bytes or a file, with the A and B running sums shown separately.
Endianness Converter
Swap byte order for 16, 32 and 64-bit values. See big-endian and little-endian hex, signed and unsigned decimal, and the float reading.
Base58 Encoder
Encode text or hex bytes to Base58 with the Bitcoin, Ripple or Flickr alphabet, plus optional Base58Check with a version byte and checksum.
Base58 Decoder
Decode Base58 and Base58Check strings to hex, Base64 and text, verify the four-byte checksum and identify the version byte.
Dockerfile Generator
Generate a production-ready Dockerfile and matching .dockerignore for Node, Python, Go, PHP, Java or static sites, with multi-stage builds and a non-root user.
docker run to docker-compose Converter
Convert any docker run command into a docker-compose.yml file. Maps ports, volumes, environment, networks, restart policies and healthchecks to Compose YAML.
GitHub Actions Workflow Generator
Build a .github/workflows CI file from a form: triggers, runner OS, language version matrix, dependency caching, permissions and lint, test and build steps.
EditorConfig Generator
Generate an .editorconfig file with per-language sections for indent style and size, line endings, charset, trailing whitespace and max line length.
Changelog Generator
Turn a list of Conventional Commits into a Keep a Changelog release entry. Groups feat, fix, perf and revert into sections and flags breaking changes.
README Generator
Build a professional README.md from a form: badges, features, install and usage code blocks, options and environment tables, and an auto-generated table of contents.
cURL to Python Requests Converter
Convert any curl command into working Python requests code. Handles headers, JSON and form bodies, basic auth, cookies, query parameters and file uploads.
Postman Collection to cURL Converter
Convert an exported Postman collection into curl commands. Walks nested folders, substitutes {{variables}} and handles raw, form-data and urlencoded bodies.
GraphQL Formatter
Format or minify GraphQL queries, mutations, fragments and SDL schemas. Preserves block strings and comments, and reports the line of any unbalanced brace.
Unified Diff Generator
Compare two texts and generate a real unified diff patch with @@ hunk headers and configurable context, ready to save as .patch and apply with git apply.
CSS Specificity Calculator
Calculate CSS selector specificity as (A,B,C) per Selectors Level 4, including :is(), :not(), :has() and :where(), and rank selectors to see which rule wins.
Unicode Character Inspector
Inspect any text character by character: Unicode code points, UTF-8 bytes, UTF-16 units, HTML entities, CSS and JS escapes, plus NFC, NFD, NFKC and NFKD forms.
OpenAPI to Markdown Converter
Convert an OpenAPI 3.x or Swagger 2.0 JSON spec into readable Markdown API documentation with parameter, request body and response tables.
Data & Format Converters
CSV to JSON Converter
Convert CSV to a JSON array of objects online. Header-row detection, comma/semicolon/tab delimiters and pretty-printed output — 100% in your browser.
JSON to CSV Converter
Convert a JSON array of objects to CSV online. Automatic column headers from the union of all keys, delimiter choice and proper quoting — all in-browser.
JSON to XML Converter
Convert JSON to readable, indented XML online. Configurable root element, arrays become repeated <item> elements, with copy and download — 100% in-browser.
XML to JSON Converter
Convert XML to JSON online. Elements become objects, attributes are prefixed with @, text is preserved, and parse errors are reported clearly — in-browser.
TSV to CSV Converter
Convert TSV to CSV online, or CSV to TSV with one toggle. Fields with commas, quotes or newlines are quoted correctly. 100% local, in your browser.
CSV Viewer & Table
View CSV as a clean HTML table online. Live search filter, row and column counts, delimiter and header options — all processed locally in your browser.
CSV Cleaner & Deduplicator
Clean CSV online: remove duplicate rows, trim whitespace, drop empty rows and normalise the delimiter. See before/after counts — 100% in your browser.
SQL INSERT Parser
Convert SQL INSERT statements to CSV or JSON online. Parse quoted strings, NULLs, numbers and multi-row VALUES lists directly in your browser.
JSON to TypeScript
Generate TypeScript interfaces from a JSON sample online. Infers types recursively, merges array shapes and marks optional keys — 100% in your browser.
JSON to Go Struct
Convert JSON to Go structs online with exported fields and json tags. Generates nested structs and slice types from a sample — free and 100% in-browser.
Markdown Table Generator
Build GitHub-flavored Markdown tables with an editable grid, column alignment and CSV/TSV paste import. Free online Markdown table generator, 100% in-browser.
HTML Table Generator
Generate clean semantic HTML tables with thead and tbody, CSS classes and striped or bordered styling. Seed from CSV/TSV — free, 100% in your browser.
JSON Path Finder
Evaluate a dot/bracket path against your JSON and list every leaf path for discovery. Free online JSON path finder that runs 100% in your browser.
JSON Diff
Compare two JSON documents structurally and see added, removed and changed values by path, ignoring key order. Free online JSON diff, 100% in your browser.
JSON Flattener
Flatten nested JSON into single-level dot-notation keys online. Choose the separator, bracket or dotted array indexes, and copy or download the result.
JSON Unflattener
Expand flat dot-notation keys back into nested JSON online. Rebuilds objects and arrays from paths like user.address.city or items[0].price, in your browser.
JSON Schema Generator
Generate a JSON Schema (draft-07 or 2020-12) from a sample JSON document. Infers types, required keys and array items for validation — 100% in your browser.
JSON to Python Dataclass
Convert JSON to Python dataclasses online. Infers str, int, float, bool, List and Optional types, builds nested classes and snake_case fields in your browser.
JSON to Java POJO
Convert JSON to a Java POJO online with private fields, getters and setters, Jackson @JsonProperty and nested classes — free and 100% in your browser.
JSON to SQL INSERT
Convert a JSON array of objects into SQL INSERT statements online. MySQL, PostgreSQL, SQLite and SQL Server quoting with batched multi-row inserts.
CSV to SQL Converter
Convert CSV to SQL online. Generates a CREATE TABLE with inferred column types plus batched INSERT statements for MySQL, PostgreSQL, SQLite or SQL Server.
CSV to XML Converter
Convert CSV to well-formed XML online. Custom root and row element names, elements or attributes, and correct escaping — 100% in your browser.
CSV to Markdown Table
Convert CSV to a GitHub-flavored Markdown table online. Auto alignment for numeric columns, padded source and safe pipe escaping — 100% in your browser.
CSV to HTML Table
Convert CSV to a clean semantic HTML table with thead, tbody, a CSS class and optional striped or bordered styling. Free, and 100% in your browser.
CSV Column Extractor
Extract specific columns from a CSV by header name, index or range. Reorder, drop or keep the columns you need — free and 100% in your browser.
CSV Splitter
Split a large CSV into smaller files by rows per file or number of files, repeating the header in each part. Free online CSV splitter, 100% in your browser.
NDJSON Converter
Convert NDJSON or JSONL to a JSON array and back online. Auto-detects direction, reports the line number of bad records — 100% in your browser.
JSON to C# Converter
Convert JSON to C# classes or records online. Infers types from a sample, adds JsonPropertyName attributes and nullable types — all in your browser.
JSON to Kotlin Converter
Convert JSON to Kotlin data classes online with kotlinx.serialization or Gson annotations, nullable types and List<T> — 100% in your browser.
JSON to Swift Converter
Convert JSON to Swift Codable structs online. Generates camelCase properties, CodingKeys for snake_case keys and optionals — all in your browser.
JSON to Dart Converter
Convert JSON to null-safe Dart classes online, with generated fromJson and toJson methods, typed List<T> fields and nested classes — in your browser.
JSON to Rust Converter
Convert JSON to Rust structs with serde derive macros online. Generates snake_case fields, serde rename attributes, Vec<T> and Option<T> types.
JSON to PHP Class Converter
Convert JSON to typed PHP 8 classes online with promoted constructor properties and fromArray factories, plus a plain PHP array literal view.
JSON Viewer
View JSON as a collapsible interactive tree online. Expand and collapse nodes, search keys and values, and copy the JSONPath of any node privately.
JSON Merge Tool
Deep merge two or more JSON files online. Choose who wins conflicts, replace, concatenate or union arrays, and see every conflicting path resolved.
JS Object to JSON Converter
Convert a JavaScript object literal to strict JSON online. Handles unquoted keys, single quotes, trailing commas and comments — without eval.
PHP Array to JSON Converter
Convert PHP array literals to JSON online. Parses array() and [] syntax, => keys, nesting and quotes, and outputs lists as real JSON arrays.
JSON Schema Validator
Validate JSON against a JSON Schema online. Checks type, required, properties, enum, pattern and more, listing every failure with its JSON Pointer.
JSON to Markdown Converter
Convert JSON to a Markdown table or bullet outline online. Arrays of objects become pipe tables with escaped cells and aligned numeric columns.
Mock JSON Data Generator
Generate fake JSON, NDJSON or CSV test data online. Define fields — names, emails, UUIDs, dates, numbers, enums — and create up to 5000 records.
CSV to TSV Converter
Convert CSV to tab-separated TSV online. Quote-aware parsing, custom input delimiters and control over embedded tabs and newlines — 100% in your browser.
CSV Sorter
Sort CSV rows by one or two columns online — as text, numbers or dates, ascending or descending, with the header row kept pinned. Free and fully in-browser.
CSV Filter
Filter CSV rows online by column conditions — equals, contains, regex, empty, numeric ranges — combined with AND/OR. Keep or remove matches, fully in-browser.
CSV Transpose
Transpose a CSV online — rows become columns and columns become rows. Quote-aware parsing, ragged rows padded automatically, all processed in your browser.
CSV Join Tool
Join two CSV files on a shared key column online — inner, left or full join like VLOOKUP or SQL, with collision-safe headers and an unmatched-key report.
Fixed Width to CSV Converter
Convert fixed-width or COBOL-style text files to CSV online. Enter column widths or break positions, preview cuts on a live ruler and trim the padding.
XML to CSV Converter
Convert XML to CSV online. Auto-detects the repeating record element, flattens nested elements and attributes into columns and outputs clean, quoted CSV.
INI to JSON Converter
Convert INI config files to JSON online. Sections become nested objects, dotted section names expand, values coerce to numbers and booleans — in-browser.
JSON to INI Converter
Convert JSON to INI configuration format online. Objects become [sections], deep nesting flattens to dotted names, values quoted where needed — in-browser.
Java Properties to JSON Converter
Convert Java .properties files to JSON and back online. Handles = and : separators, backslash continuations, \uXXXX escapes and dotted-key nesting.
.env to JSON Converter
Convert .env files to JSON and JSON back to .env online. Handles export prefixes, quotes, multi-line values and comments — secrets never leave your browser.
HAR File Viewer
Open and analyze HAR files online — request table with method, status, size and timing, slowest-request and status-code stats, plus per-request headers.
SQL CREATE TABLE Generator
Build CREATE TABLE statements visually for MySQL, PostgreSQL, SQLite and SQL Server — types, keys, defaults, auto-increment — or infer columns from CSV.
YAML to JSON Converter
Convert YAML to JSON online in your browser. Handles block scalars, flow collections, anchors and multi-document files — nothing is uploaded.
JSON to YAML Converter
Convert JSON to clean block-style YAML online. Choose the indent width, sort keys, and keep numeric strings quoted — all inside your browser.
YAML Formatter
Format and re-indent YAML online. Normalise indentation, collapse blank lines, sort keys and rewrite flow collections as block style, privately.
YAML Validator
Validate YAML online and catch the errors that break CI: tabs, bad indentation, duplicate keys, missing spaces after a colon and unclosed quotes.
TOML to JSON Converter
Convert TOML to JSON online. Parses TOML v1.0 tables, arrays of tables, dotted keys, dates and multi-line strings entirely inside your browser.
JSON to TOML Converter
Convert JSON to TOML online. Emits scalar keys first, then [table] headers and [[array]] blocks in the order TOML requires — 100% in-browser.
XPath Tester
Test XPath 1.0 expressions against your XML online. See every matched node with its full path, plus the result type and match count, privately.
XSLT Transformer
Apply an XSL stylesheet to an XML document online with your browser's native XSLT 1.0 engine. Copy or download the result as XML, HTML or text.
JSON Pointer Resolver
Resolve RFC 6901 JSON Pointers against any JSON document online, or list every valid pointer in the file with its value — all in your browser.
JSON Patch Generator
Generate an RFC 6902 JSON Patch from two JSON documents, or apply a patch and check that it round-trips. Runs entirely inside your browser.
JSON Schema to TypeScript
Convert JSON Schema to TypeScript interfaces online. Handles $ref, enum, oneOf, allOf, tuples and index signatures — 100% inside your browser.
JSON to .env Converter
Convert JSON to a .env file online. Flattens nested keys with underscores, upper-cases names and quotes tricky values — nothing leaves your device.
JSONC to JSON Converter
Convert JSONC to strict JSON online. Strips // and /* */ comments and trailing commas without ever touching text inside string literals.
HTML Table to CSV Converter
Convert an HTML table to CSV online. Expands rowspan and colspan, picks between several tables on a page and quotes fields properly — all in your browser.
HTML Table to JSON Converter
Turn an HTML table into a JSON array of objects online. Header keys, camelCase or snake_case, number and boolean coercion, NDJSON output — all in-browser.
Markdown Table to CSV Converter
Convert GitHub-flavoured Markdown pipe tables to CSV or TSV online. Strips bold, code and links, handles escaped pipes and finds every table in a document.
CSV Diff
Compare two CSV files online and see added, removed and changed rows. Match on a key column or by row position, with a downloadable change report.
CSV Column Statistics Calculator
Profile a CSV column by column: type, blanks, distinct values, min, max, mean, median, standard deviation and percentiles, plus top values — all in-browser.
CSV Anonymizer
Anonymise a CSV column by column: redact, partial mask, consistent SHA-256 pseudonyms, email masking, numeric jitter or date shifting — all in your browser.
VCF (vCard) to CSV Converter
Convert a .vcf contact file to CSV online. Unfolds folded lines, decodes quoted-printable, and maps names, phones, emails and addresses to named columns.
CSV to vCard (VCF) Converter
Convert a contacts CSV to a .vcf file online. Map your columns to vCard fields, choose version 3.0 or 4.0, with proper escaping and 75-octet line folding.
ICS (iCalendar) to CSV Converter
Convert an .ics calendar file to CSV online. One row per event with start, end, duration, location, organiser, attendees and recurrence — all in your browser.
CSV to Fixed-Width Converter
Convert CSV to a fixed-width flat file online. Auto-fitted column widths, per-column alignment and padding, plus a copy-ready layout specification.
CSV Pivot Table Generator
Build a pivot table from CSV online. Group by rows and columns, aggregate with sum, count, average, min, max or median, with totals and CSV or Markdown export.
JSON to Protobuf Schema Generator
Generate a proto3 .proto message definition from a sample JSON document. Infers int32, int64, double, bool, string, repeated fields and nested messages.
SEO Tools
Meta Tag Generator
Generate SEO-ready HTML meta tags with live character counters for title and description. Free meta tag generator with robots, viewport and charset options.
Open Graph Generator
Generate Open Graph meta tags for Facebook, LinkedIn and WhatsApp link previews. Free OG tag generator with a live social share preview card.
Twitter Card Generator
Generate Twitter Card meta tags for rich link previews on X. Choose summary or large image cards, set handles, and see a live preview mock-up.
Canonical Tag Generator
Generate a correct rel=canonical link tag from any URL, with optional trailing-slash and lowercase normalization. Fix duplicate content the easy way.
Hreflang Tag Generator
Generate hreflang link tags for multilingual and multi-regional sites. Add URL and language rows, include x-default, and catch duplicate locales.
Robots.txt Generator
Build a robots.txt file with user-agent rules, allow/disallow paths, crawl-delay and sitemap URL. One-click presets to allow all, block all, or block AI bots.
XML Sitemap Generator
Paste a list of URLs and generate a valid XML sitemap with lastmod, changefreq and priority. Validates URLs and downloads sitemap.xml instantly.
JSON-LD Generator
Generate Schema.org JSON-LD structured data for WebSite, WebPage, LocalBusiness, Person, Event and Recipe types with a simple guided form.
Article Schema Generator
Free article schema generator: build Article, NewsArticle or BlogPosting JSON-LD with headline, author, publisher, dates and image, ready to copy.
Breadcrumb Schema Generator
Free breadcrumb schema generator: build BreadcrumbList JSON-LD from simple name and URL rows, with positions numbered automatically. Copy the script and go.
FAQ Schema Generator
Free FAQ schema generator: turn question-and-answer pairs into valid FAQPage JSON-LD, then check the markup before pasting the script into your page.
Organization Schema Generator
Free organization schema generator: build valid Organization JSON-LD with name, logo, URL, social profiles (sameAs) and a contact point for your brand.
Product Schema Generator
Free product schema generator: build Product JSON-LD with brand, SKU, price, currency and availability, plus optional ratings for rich snippets with stars.
Author Schema Generator
Free author schema generator: build schema.org Person JSON-LD for article authors — name, job title, image, sameAs profiles and organization, ready to copy.
Image Schema Generator
Free image schema generator: build schema.org ImageObject JSON-LD with content URL, caption, creator, credit, license and dimensions, ready to copy.
SERP Snippet Preview
Preview how your page looks in Google search with a live desktop and mobile SERP snippet, pixel-width truncation warnings and title and description counters.
UTM Builder
Build tagged campaign URLs with UTM source, medium, campaign, term and content parameters. Validates the base URL and outputs a clean tracking link.
Meta Robots Generator
Build a robots meta tag from checkboxes for index, follow, noarchive, nosnippet, noimageindex and max-snippet, max-image-preview and max-video-preview limits.
Htaccess Redirect Generator
Generate Apache .htaccess 301 and 302 redirect rules from old-to-new path rows, plus one-click force HTTPS and force www or non-www canonicalization.
RSS Feed Generator
Build a valid RSS 2.0 XML feed from channel details and item rows with title, link, description and pubDate. Copy or download the ready-to-publish feed.
Sitemap Index Generator
Generate a valid XML sitemap index from a list of child sitemap URLs with optional lastmod dates. Validates URLs and downloads sitemap_index.xml.
Local Business Schema Generator
Create LocalBusiness JSON-LD with name, address, geo coordinates, phone, opening hours, price range and URL. Copy structured data for local SEO rich results.
Event Schema Generator
Generate Event JSON-LD with name, start and end dates, location, offers with price and availability, performer and URL for event rich results in Google.
Recipe Schema Generator
Create Recipe JSON-LD with name, image, author, prep and cook time, ingredients, instructions, calories and ratings for recipe rich results in Google.
HowTo Schema Generator
Generate HowTo JSON-LD with a name, total time, supplies and tools, and ordered steps with text and optional images. Copy structured data for tutorials.
Video Schema Generator
Create VideoObject JSON-LD with name, description, thumbnail, upload date, duration and content or embed URL for video rich results and Google video search.
Review Schema Generator
Generate Review JSON-LD with the reviewed item and type, rating value with best and worst, author, review body and publisher for review rich results.
JobPosting Schema Generator
Generate JobPosting JSON-LD structured data for Google Jobs with salary, location, remote options and employment type. Free, with required-field warnings.
Course Schema Generator
Create Course JSON-LD structured data with provider, course mode, instances, workload and ratings. Free schema generator that runs entirely in your browser.
Book Schema Generator
Generate Book JSON-LD structured data with author, ISBN, book format, publisher and multiple editions via workExample. Free and fully client-side.
SoftwareApplication Schema Generator
Build SoftwareApplication JSON-LD with app category, operating system, price offer and aggregate rating for software rich results. Free and private.
Service Schema Generator
Create Service JSON-LD structured data with service type, provider, area served and an offer catalog of individual services. Free and 100% client-side.
QAPage Schema Generator
Generate QAPage JSON-LD with a question, accepted answer and suggested answers for forum and Q&A rich results. Not the same as FAQ schema. Free tool.
WebSite Schema Generator
Create WebSite JSON-LD with site name, alternate name and an optional SearchAction for the Google sitelinks search box. Free, instant and private.
Restaurant Schema Generator
Generate Restaurant JSON-LD with cuisine, price range, menu URL, reservations, address and opening hours for local search. Free and fully in-browser.
ItemList (Carousel) Schema Generator
Build ItemList JSON-LD with positioned ListItem entries from URL, name and image rows — the markup behind listicles and carousel rich results. Free tool.
JSON-LD Validator
Validate JSON-LD structured data in your browser: syntax errors with line numbers plus required and recommended property checks for 20 schema types.
llms.txt Generator
Build a spec-correct llms.txt file for your site — H1 name, blockquote summary and sectioned Markdown link lists that guide AI assistants to your best pages.
Ads.txt Generator
Generate a valid IAB ads.txt file from simple rows with presets for Google AdSense and major exchanges, duplicate detection and a one-click .txt download.
Favicon HTML Tag Generator
Generate the complete modern favicon head block — ICO, SVG and PNG icons, apple-touch-icon, web manifest and theme-color — from a base path and colour.
Robots.txt Tester
Paste your robots.txt, a URL path and a user-agent to see if crawling is allowed or blocked, with the exact deciding rule highlighted. Free and private.
XML Sitemap Validator
Paste an XML sitemap to validate structure, namespace, URLs, lastmod dates, changefreq and priority values, plus the 50,000-URL limit. 100% in your browser.
Sitemap URL Extractor
Extract every URL from a pasted XML sitemap or sitemap index into a clean list. Dedupe, sort, count and download as TXT or CSV — all locally in your browser.
XML Sitemap Splitter
Split a large pasted XML sitemap into chunks under the 50,000-URL limit and generate the matching sitemap index file. Each part is downloadable, all offline.
Hreflang Validator
Paste hreflang link tags to validate ISO language and region codes, find duplicates, missing x-default and broken return links across pages. Runs locally.
Heading Structure Checker
Paste HTML to see your H1–H6 outline as an indented tree, flagging missing or multiple H1s, skipped levels and empty headings. 100% local, no crawling.
Meta Tag Analyzer
Paste page HTML to extract and audit the title tag, meta description, robots, canonical, viewport, Open Graph and Twitter tags with length checks. Local only.
Open Graph Preview
Paste Open Graph and Twitter Card tags to preview how your link renders on Facebook, X, LinkedIn and Slack, with warnings for missing or oversized values.
Title Tag Length Checker
Check your title tag's real pixel width against Google's ~580px desktop and ~490px mobile limits, with truncation previews and keyword position. Free and local.
Meta Description Length Checker
Measure your meta description's pixel width against Google's ~920px limit with a truncation preview, character count and keyword check. Runs in your browser.
Nginx Redirect Generator
Turn an old-to-new URL list into nginx 301 redirect config — return or rewrite directives, plus HTTPS and www canonical server blocks. Copy or download.
Keyword Combiner
Combine up to four keyword lists into every possible phrase permutation with custom slot order, separators and dedupe — the classic PPC keyword mixer tool.
Bulk UTM Builder
Add UTM parameters to a whole list of URLs at once using templates with placeholders. Proper URL encoding, text or CSV output — free and fully private.
ProfilePage Schema Generator
Build ProfilePage JSON-LD for a creator, author or forum profile, with a Person or Organization mainEntity, sameAs links and follower and post counts.
Movie Schema Generator
Generate Movie JSON-LD with director, cast, ISO 8601 runtime, genre, content rating, a trailer VideoObject and optional aggregate rating and review.
Podcast Episode Schema Generator
Create PodcastEpisode JSON-LD with the parent PodcastSeries, episode number, ISO 8601 duration, publication date, audio file and transcript.
Dataset Schema Generator
Build Dataset JSON-LD for Google Dataset Search with licence, DOI, creator, temporal and spatial coverage, variables measured and DataDownload files.
ProductGroup Schema Generator
Generate ProductGroup JSON-LD for products with options: productGroupID, variesBy, and a hasVariant array of Product entries with SKU, price and availability.
Restaurant Menu Schema Generator
Build nested Menu, MenuSection and MenuItem JSON-LD with prices, RestrictedDiet values and calories, ready to attach to a restaurant's hasMenu.
Real Estate Listing Schema Generator
Generate RealEstateListing JSON-LD with a residence or apartment, floor size, bedrooms, bathrooms, year built, address, coordinates and a price offer.
Vehicle Schema Generator
Build Car or Vehicle JSON-LD for dealer listings with VIN, odometer QuantitativeValue, fuel type, transmission, body type, doors and a seller offer.
Hotel Schema Generator
Create Hotel or LodgingBusiness JSON-LD with address, coordinates, star rating, check-in and check-out times, room count and an amenity feature list.
Video Game Schema Generator
Generate VideoGame JSON-LD with platforms, play modes, ESRB or PEGI content rating, system requirements, developer, publisher and a price offer.
Quiz Schema Generator
Build Quiz JSON-LD for Google practice problems: Question nodes with eduQuestionType, accepted and suggested answers and per-option explanations.
Speakable Schema Generator
Attach a speakable SpeakableSpecification to a WebPage or Article using CSS selectors or XPath, with duplicate and selector-type validation.
Microdata to JSON-LD Converter
Convert legacy HTML microdata to JSON-LD: paste markup with itemscope and itemprop attributes and get the equivalent nested structured data.
Google News Sitemap Generator
Build a valid Google News XML sitemap from a pasted list of articles, with publication name, language, W3C publication dates and the 1,000-URL limit checked.
Image Sitemap Generator
Create an XML image sitemap with the Google image namespace from pasted page and image URLs, with absolute-URL validation and a downloadable image-sitemap.xml.
Video Sitemap Generator
Build a video XML sitemap with thumbnail, title, description, content and player URLs, duration and publication date, validated against Google's documented limits.
Hreflang XML Sitemap Generator
Turn language and URL pairs into a valid hreflang XML sitemap with reciprocal alternate links, validated ISO language and region codes and one x-default per group.
Podcast RSS Feed Generator
Generate an Apple Podcasts compatible RSS 2.0 feed with iTunes tags, an atom self link and per-episode enclosures, GUIDs and RFC 822 pubDates you can download.
humans.txt Generator
Build a humans.txt credits file from team, thanks and site sections in the conventional layout, then copy or download it with the matching head link tag.
Web App Manifest Generator
Create a PWA manifest.json with name, start_url, display, theme colours, maskable icons, shortcuts and screenshots, plus the matching link and theme-color tags.
Bulk Meta Tag Generator
Turn a CSV or TSV of pages into title, meta description, canonical, Open Graph and Twitter Card tags, with character and pixel-width warnings on every row.
Image Alt Text Checker
Paste HTML to list every image, image input and map area with its alt state, length, filename repeats, duplicates and how role or aria-hidden changes the verdict.
Internal Link Analyzer
Paste page HTML and a site host to classify every link as internal, subdomain or external, with anchor text, rel tokens, resolved URLs and links per destination.
Anchor Text Distribution Checker
Classify pasted anchor text as exact, partial, branded, naked URL, generic or image and chart the percentage split against a natural-profile guideline.
Keyword Clustering Tool
Group a pasted keyword list into topic clusters using Jaccard token similarity, with an adjustable threshold, an editable stopword list and CSV export.
Calculators
Percentage Calculator
Calculate what X% of a number is, what percent one number is of another, and percentage increase or decrease between two values — instantly and free.
Discount Calculator
Work out the final sale price and money saved from any discount percentage, including stacked double discounts like an extra 10% off an already reduced price.
GST Calculator
Add GST to a net amount or extract GST from an inclusive price. Preset 5%, 12%, 18% and 28% slabs plus custom rates, with net, tax and gross shown instantly.
VAT Calculator
Add VAT to a net price or extract VAT from a gross amount. Preset 5%, 10%, 20% and 23% rates plus custom, showing net, VAT and gross values instantly.
EMI Calculator
Calculate your monthly EMI for home, car or personal loans from loan amount, interest rate and tenure — with total interest and a full amortization schedule.
BMI Calculator
Calculate your Body Mass Index from height and weight in metric (cm/kg) or imperial (ft-in/lbs) units and see your WHO category with a color-coded badge.
Age Calculator
Find your exact age in years, months and days from your date of birth, plus totals in weeks, days and hours and a countdown to your next birthday.
Binary Calculator
Do arithmetic and bitwise math on binary, decimal, hex and octal numbers — add, subtract, multiply, divide, AND, OR, XOR and shifts, with results in all bases.
Scientific Calculator
Free online scientific calculator with sin, cos, tan in degrees or radians, log, ln, powers, roots, π, e, parentheses, memory keys and keyboard support.
Unit Converter
Convert between units of length, weight, temperature, area, volume, speed, time and data storage instantly, with a swap button and common conversion tables.
Area Calculator
Calculate the area of a rectangle, triangle, circle, trapezoid or ellipse from simple measurements, with the formula shown and results in m², ft² and more.
Volume Calculator
Calculate the volume of a cube, box, sphere, cylinder, cone, pyramid, capsule or prism, with instant conversion to litres, gallons, cubic feet and yards.
Surface Area Calculator
Find total and lateral surface area for cubes, boxes, spheres, cylinders, cones, pyramids, capsules and prisms, with the exact formula shown for every shape.
Perimeter Calculator
Work out the perimeter of a rectangle, square, triangle, trapezoid, parallelogram, regular polygon, circle or ellipse in metric or imperial units.
Roof Pitch Calculator
Convert roof pitch between rise/run ratio, degrees and slope percent, and get the rafter length from the Pythagorean theorem in feet or metres.
Cubic Yard Calculator
Convert length, width and depth in feet, inches, yards, metres or centimetres into cubic yards, cubic feet and cubic metres for landscaping material orders.
Equation of a Circle Calculator
Convert a circle between general form and standard form, or build its equation from a center and radius, a point on the circle, or any three points.
Ellipse Calculator
Solve an ellipse from its semi-axes or its general equation: area, Ramanujan perimeter, eccentricity, foci, vertices, latus rectum and directrices.
Hyperbola Calculator
Find the center, vertices, foci, eccentricity, asymptote equations and latus rectum of a hyperbola from standard form or a general second-degree equation.
Triangle Centers Calculator
Enter three vertex coordinates to locate the centroid, circumcenter, incenter and orthocenter of a triangle, with the circumradius, inradius and Euler line.
Polygon Area Calculator
Paste a list of vertex coordinates to get the area of any simple polygon by the shoelace formula, plus perimeter, centroid, winding order and a convexity check.
Circle Sector and Segment Calculator
Solve a circular sector or segment from any two known values: arc length, chord, sector area, segment area, segment height and the major sector are all returned.
Hexagon Calculator
Solve a regular hexagon from any single measurement — side, area, perimeter, apothem, circumradius or either diagonal — and see how many tile a given area.
Rhombus Calculator
Solve a rhombus from two diagonals, a side and an angle, a side and its height, or a side and one diagonal, with the formula behind every number shown.
Trapezoid Calculator
Solve a trapezoid from its parallel sides plus a height, both legs or both base angles: area, median, legs, all four angles, diagonals and a scale drawing.
Golden Ratio Calculator
Split any length into golden sections with phi = 1.6180339887, build a golden rectangle and spiral, and generate a golden typographic scale for design work.
Tank Volume Calculator
Work out total capacity and the volume at any liquid depth for vertical, horizontal, rectangular, oval and capsule tanks, in litres, gallons, cubic metres and feet.
Cone Frustum Calculator
Calculate the volume, slant height and surface area of a truncated cone, and get the flat pattern radii and included angle for sheet metal or papercraft.
Derivative Calculator
Differentiate any function of x symbolically. Get f′(x) and f″(x) in simplified form, their value at a point, and a numerical check of the result.
Definite Integral Calculator
Evaluate a definite integral numerically with adaptive Simpson's rule. See the value, the error estimate and a shaded plot of the area under the curve.
Limit Calculator
Estimate the limit of a function as x approaches a value or infinity. See the full two-sided approach table and whether the limit exists at all.
Riemann Sum Calculator
Compute left, right, midpoint and trapezoidal Riemann sums with a full per-rectangle table and a drawing of the rectangles under your curve.
Tangent Line Calculator
Find the tangent and normal line to a curve at any point. Get the slope, the equation in y = mx + c form and a graph of all three together.
Newton's Method Calculator
Find a root of any function by Newton-Raphson iteration. See every step in a table with xₙ, f(xₙ), f′(xₙ) and the shrinking step size.
Euler's Method Calculator
Solve an initial value problem dy/dx = f(x, y) step by step, with an improved Euler comparison column, a full table and a plotted solution curve.
Taylor Series Calculator
Expand a function as a Taylor or Maclaurin series about any centre. Get the polynomial, the coefficients, the truncation error and the radius of convergence.
Summation Calculator
Evaluate a sigma-notation sum term by term with exact integer arithmetic, and see the standard closed-form identity beside the numeric answer.
Nth Term Calculator
Paste a sequence and find the rule behind it. Detects arithmetic, quadratic, cubic and geometric patterns and predicts any term you ask for.
Pascal's Triangle Generator
Generate Pascal's triangle to any number of rows with exact big integers, look up any C(n, k), and highlight the Sierpiński and diagonal patterns.
Binomial Expansion Calculator
Expand (ax + b)ⁿ term by term with exact coefficients, find the coefficient of any power of x, and handle fractional or negative exponents as a series.
Cone Calculator
Solve a right circular cone from any two of radius, height and slant height, with volume, lateral and total surface area, apex angle and a cutting template.
Pyramid Calculator
Solve square, rectangular and regular n-sided pyramids: volume, base area, slant height, lateral edge and surface area, or work backwards from a target volume.
Parallelogram Calculator
Find the area, perimeter, both heights, both diagonals and the angle between them from two sides and an angle, a base and height, or a side and a diagonal.
Annulus Calculator
Work out the area of a ring from its two radii, or solve for a missing radius from a target area, with sector area, arc lengths and the sector centroid.
Scale Conversion Calculator
Convert between real-world and model dimensions at any scale ratio, translate architectural scales, and apply the n² and n³ factors to area, volume and weight.
Paper Size Converter
Look up any ISO A, B, C, JIS B, ANSI or photo paper size in mm, cm, inches, points and pixels, and get the exact print scale between any two sizes.
Shoe Size Converter
Convert between UK, US men's, US women's, EU and Japanese shoe sizes using the barleycorn and Paris-point relationships, with the foot length each size fits.
Tire Size Calculator
Decode any metric or flotation tyre size into sidewall height, overall diameter and revolutions per mile, and compare two sizes for speedometer error.
Gear Ratio Calculator
Get final drive from ring and pinion teeth, then overall ratios, speed at redline in every gear, cruising RPM, crawl ratio and the axle ratio for a tyre change.
Fuel Economy Converter
Convert MPG US, MPG imperial, L/100 km, km/L and miles per litre in any direction, then cost a journey and see the real saving between two figures.
Heat Index Calculator
Work out how hot it really feels from temperature and humidity using the NWS Rothfusz regression, with the official warning band and the dew point.
Wind Chill Calculator
Apply the 2001 North American wind chill formula in Fahrenheit or Celsius, with validity limits flagged and the frostbite exposure time for the result.
Unit Converters
Millimeter to Centimeter Converter
Convert millimeters to centimeters online. 1 mm = 0.1 cm. Free, instant Millimeter-to-Centimeter converter. Works both ways with a formula and reference table.
Millimeter to Meter Converter
Convert millimeters to meters online. 1 mm = 0.001 m. Free, instant Millimeter-to-Meter converter. Works both ways with a formula and reference table.
Millimeter to Kilometer Converter
Convert millimeters to kilometers online. 1 mm = 1.000000e-6 km. Free, instant Millimeter-to-Kilometer converter. 100% in your browser, no uploads.
Millimeter to Inch Converter
Convert millimeters to inches online. 1 mm = 0.03937008 in. Free, instant Millimeter-to-Inch converter. Works both ways with a formula and reference table.
Millimeter to Foot Converter
Convert millimeters to feet online. 1 mm = 0.00328084 ft. Free, instant Millimeter-to-Foot converter. Works both ways with a formula and reference table.
Millimeter to Yard Converter
Convert millimeters to yards online. 1 mm = 0.00109361 yd. Free, instant Millimeter-to-Yard converter. Works both ways with a formula and reference table.
Millimeter to Mile Converter
Convert millimeters to miles online. 1 mm = 6.213712e-7 mi. Free, instant Millimeter-to-Mile converter. Works both ways with a formula and reference table.
Centimeter to Millimeter Converter
Convert centimeters to millimeters online. 1 cm = 10 mm. Free, instant Centimeter-to-Millimeter converter. Works both ways with a formula and reference table.
Centimeter to Meter Converter
Convert centimeters to meters online. 1 cm = 0.01 m. Free, instant Centimeter-to-Meter converter. Works both ways with a formula and reference table.
Centimeter to Kilometer Converter
Convert centimeters to kilometers online. 1 cm = 1.000000e-5 km. Free, instant Centimeter-to-Kilometer converter. 100% in your browser, no uploads.
Centimeter to Inch Converter
Convert centimeters to inches online. 1 cm = 0.39370079 in. Free, instant Centimeter-to-Inch converter. Works both ways with a formula and reference table.
Centimeter to Foot Converter
Convert centimeters to feet online. 1 cm = 0.0328084 ft. Free, instant Centimeter-to-Foot converter. Works both ways with a formula and reference table.
Centimeter to Yard Converter
Convert centimeters to yards online. 1 cm = 0.01093613 yd. Free, instant Centimeter-to-Yard converter. Works both ways with a formula and reference table.
Centimeter to Mile Converter
Convert centimeters to miles online. 1 cm = 6.213712e-6 mi. Free, instant Centimeter-to-Mile converter. Works both ways with a formula and reference table.
Meter to Millimeter Converter
Convert meters to millimeters online. 1 m = 1000 mm. Free, instant Meter-to-Millimeter converter. Works both ways with a formula and reference table.
Meter to Centimeter Converter
Convert meters to centimeters online. 1 m = 100 cm. Free, instant Meter-to-Centimeter converter. Works both ways with a formula and reference table.
Meter to Kilometer Converter
Convert meters to kilometers online. 1 m = 0.001 km. Free, instant Meter-to-Kilometer converter. Works both ways with a formula and reference table.
Meter to Inch Converter
Convert meters to inches online. 1 m = 39.370079 in. Free, instant Meter-to-Inch converter. Works both ways with a formula and reference table.
Meter to Foot Converter
Convert meters to feet online. 1 m = 3.28084 ft. Free, instant Meter-to-Foot converter. Works both ways with a formula and reference table.
Meter to Yard Converter
Convert meters to yards online. 1 m = 1.093613 yd. Free, instant Meter-to-Yard converter. Works both ways with a formula and reference table.
Meter to Mile Converter
Convert meters to miles online. 1 m = 0.00062137 mi. Free, instant Meter-to-Mile converter. Works both ways with a formula and reference table.
Kilometer to Millimeter Converter
Convert kilometers to millimeters online. 1 km = 1000000 mm. Free, instant Kilometer-to-Millimeter converter. 100% in your browser, no uploads.
Kilometer to Centimeter Converter
Convert kilometers to centimeters online. 1 km = 100000 cm. Free, instant Kilometer-to-Centimeter converter. Works both ways with a formula and reference table.
Kilometer to Meter Converter
Convert kilometers to meters online. 1 km = 1000 m. Free, instant Kilometer-to-Meter converter. Works both ways with a formula and reference table.
Kilometer to Inch Converter
Convert kilometers to inches online. 1 km = 39370.07874 in. Free, instant Kilometer-to-Inch converter. Works both ways with a formula and reference table.
Kilometer to Foot Converter
Convert kilometers to feet online. 1 km = 3280.839895 ft. Free, instant Kilometer-to-Foot converter. Works both ways with a formula and reference table.
Kilometer to Yard Converter
Convert kilometers to yards online. 1 km = 1093.613298 yd. Free, instant Kilometer-to-Yard converter. Works both ways with a formula and reference table.
Kilometer to Mile Converter
Convert kilometers to miles online. 1 km = 0.62137119 mi. Free, instant Kilometer-to-Mile converter. Works both ways with a formula and reference table.
Inch to Millimeter Converter
Convert inches to millimeters online. 1 in = 25.4 mm. Free, instant Inch-to-Millimeter converter. Works both ways with a formula and reference table.
Inch to Centimeter Converter
Convert inches to centimeters online. 1 in = 2.54 cm. Free, instant Inch-to-Centimeter converter. Works both ways with a formula and reference table.
Inch to Meter Converter
Convert inches to meters online. 1 in = 0.0254 m. Free, instant Inch-to-Meter converter. Works both ways with a formula and reference table.
Inch to Kilometer Converter
Convert inches to kilometers online. 1 in = 2.540000e-5 km. Free, instant Inch-to-Kilometer converter. Works both ways with a formula and reference table.
Inch to Foot Converter
Convert inches to feet online. 1 in = 0.08333333 ft. Free, instant Inch-to-Foot converter. Works both ways with a formula and reference table.
Inch to Yard Converter
Convert inches to yards online. 1 in = 0.02777778 yd. Free, instant Inch-to-Yard converter. Works both ways with a formula and reference table.
Inch to Mile Converter
Convert inches to miles online. 1 in = 1.578283e-5 mi. Free, instant Inch-to-Mile converter. Works both ways with a formula and reference table.
Foot to Millimeter Converter
Convert feet to millimeters online. 1 ft = 304.8 mm. Free, instant Foot-to-Millimeter converter. Works both ways with a formula and reference table.
Foot to Centimeter Converter
Convert feet to centimeters online. 1 ft = 30.48 cm. Free, instant Foot-to-Centimeter converter. Works both ways with a formula and reference table.
Foot to Meter Converter
Convert feet to meters online. 1 ft = 0.3048 m. Free, instant Foot-to-Meter converter. Works both ways with a formula and reference table.
Foot to Kilometer Converter
Convert feet to kilometers online. 1 ft = 0.0003048 km. Free, instant Foot-to-Kilometer converter. Works both ways with a formula and reference table.
Foot to Inch Converter
Convert feet to inches online. 1 ft = 12 in. Free, instant Foot-to-Inch converter. Works both ways with a formula and reference table.
Foot to Yard Converter
Convert feet to yards online. 1 ft = 0.33333333 yd. Free, instant Foot-to-Yard converter. Works both ways with a formula and reference table.
Foot to Mile Converter
Convert feet to miles online. 1 ft = 0.00018939 mi. Free, instant Foot-to-Mile converter. Works both ways with a formula and reference table.
Yard to Millimeter Converter
Convert yards to millimeters online. 1 yd = 914.4 mm. Free, instant Yard-to-Millimeter converter. Works both ways with a formula and reference table.
Yard to Centimeter Converter
Convert yards to centimeters online. 1 yd = 91.44 cm. Free, instant Yard-to-Centimeter converter. Works both ways with a formula and reference table.
Yard to Meter Converter
Convert yards to meters online. 1 yd = 0.9144 m. Free, instant Yard-to-Meter converter. Works both ways with a formula and reference table.
Yard to Kilometer Converter
Convert yards to kilometers online. 1 yd = 0.0009144 km. Free, instant Yard-to-Kilometer converter. Works both ways with a formula and reference table.
Yard to Inch Converter
Convert yards to inches online. 1 yd = 36 in. Free, instant Yard-to-Inch converter. Works both ways with a formula and reference table.
Yard to Foot Converter
Convert yards to feet online. 1 yd = 3 ft. Free, instant Yard-to-Foot converter. Works both ways with a formula and reference table.
Yard to Mile Converter
Convert yards to miles online. 1 yd = 0.00056818 mi. Free, instant Yard-to-Mile converter. Works both ways with a formula and reference table.
Mile to Millimeter Converter
Convert miles to millimeters online. 1 mi = 1609344 mm. Free, instant Mile-to-Millimeter converter. Works both ways with a formula and reference table.
Mile to Centimeter Converter
Convert miles to centimeters online. 1 mi = 160934.4 cm. Free, instant Mile-to-Centimeter converter. Works both ways with a formula and reference table.
Mile to Meter Converter
Convert miles to meters online. 1 mi = 1609.344 m. Free, instant Mile-to-Meter converter. Works both ways with a formula and reference table.
Mile to Kilometer Converter
Convert miles to kilometers online. 1 mi = 1.609344 km. Free, instant Mile-to-Kilometer converter. Works both ways with a formula and reference table.
Mile to Inch Converter
Convert miles to inches online. 1 mi = 63360 in. Free, instant Mile-to-Inch converter. Works both ways with a formula and reference table.
Mile to Foot Converter
Convert miles to feet online. 1 mi = 5280 ft. Free, instant Mile-to-Foot converter. Works both ways with a formula and reference table.
Mile to Yard Converter
Convert miles to yards online. 1 mi = 1760 yd. Free, instant Mile-to-Yard converter. Works both ways with a formula and reference table.
Milligram to Gram Converter
Convert milligrams to grams online. 1 mg = 0.001 g. Free, instant Milligram-to-Gram converter. Works both ways with a formula and reference table.
Milligram to Kilogram Converter
Convert milligrams to kilograms online. 1 mg = 1.000000e-6 kg. Free, instant Milligram-to-Kilogram converter. 100% in your browser, no uploads.
Milligram to Tonne Converter
Convert milligrams to tonnes online. 1 mg = 1.000000e-9 t. Free, instant Milligram-to-Tonne converter. Works both ways with a formula and reference table.
Milligram to Ounce Converter
Convert milligrams to ounces online. 1 mg = 3.527396e-5 oz. Free, instant Milligram-to-Ounce converter. Works both ways with a formula and reference table.
Milligram to Pound Converter
Convert milligrams to pounds online. 1 mg = 2.204623e-6 lb. Free, instant Milligram-to-Pound converter. Works both ways with a formula and reference table.
Milligram to Stone Converter
Convert milligrams to stone online. 1 mg = 1.574730e-7 st. Free, instant Milligram-to-Stone converter. Works both ways with a formula and reference table.
Gram to Milligram Converter
Convert grams to milligrams online. 1 g = 1000 mg. Free, instant Gram-to-Milligram converter. Works both ways with a formula and reference table.
Gram to Kilogram Converter
Convert grams to kilograms online. 1 g = 0.001 kg. Free, instant Gram-to-Kilogram converter. Works both ways with a formula and reference table.
Gram to Tonne Converter
Convert grams to tonnes online. 1 g = 1.000000e-6 t. Free, instant Gram-to-Tonne converter. Works both ways with a formula and reference table.
Gram to Ounce Converter
Convert grams to ounces online. 1 g = 0.03527396 oz. Free, instant Gram-to-Ounce converter. Works both ways with a formula and reference table.
Gram to Pound Converter
Convert grams to pounds online. 1 g = 0.00220462 lb. Free, instant Gram-to-Pound converter. Works both ways with a formula and reference table.
Gram to Stone Converter
Convert grams to stone online. 1 g = 0.00015747 st. Free, instant Gram-to-Stone converter. Works both ways with a formula and reference table.
Kilogram to Milligram Converter
Convert kilograms to milligrams online. 1 kg = 1000000 mg. Free, instant Kilogram-to-Milligram converter. Works both ways with a formula and reference table.
Kilogram to Gram Converter
Convert kilograms to grams online. 1 kg = 1000 g. Free, instant Kilogram-to-Gram converter. Works both ways with a formula and reference table.
Kilogram to Tonne Converter
Convert kilograms to tonnes online. 1 kg = 0.001 t. Free, instant Kilogram-to-Tonne converter. Works both ways with a formula and reference table.
Kilogram to Ounce Converter
Convert kilograms to ounces online. 1 kg = 35.273962 oz. Free, instant Kilogram-to-Ounce converter. Works both ways with a formula and reference table.
Kilogram to Pound Converter
Convert kilograms to pounds online. 1 kg = 2.204623 lb. Free, instant Kilogram-to-Pound converter. Works both ways with a formula and reference table.
Kilogram to Stone Converter
Convert kilograms to stone online. 1 kg = 0.15747304 st. Free, instant Kilogram-to-Stone converter. Works both ways with a formula and reference table.
Tonne to Milligram Converter
Convert tonnes to milligrams online. 1 t = 1000000000 mg. Free, instant Tonne-to-Milligram converter. Works both ways with a formula and reference table.
Tonne to Gram Converter
Convert tonnes to grams online. 1 t = 1000000 g. Free, instant Tonne-to-Gram converter. Works both ways with a formula and reference table.
Tonne to Kilogram Converter
Convert tonnes to kilograms online. 1 t = 1000 kg. Free, instant Tonne-to-Kilogram converter. Works both ways with a formula and reference table.
Tonne to Ounce Converter
Convert tonnes to ounces online. 1 t = 35273.96195 oz. Free, instant Tonne-to-Ounce converter. Works both ways with a formula and reference table.
Tonne to Pound Converter
Convert tonnes to pounds online. 1 t = 2204.622622 lb. Free, instant Tonne-to-Pound converter. Works both ways with a formula and reference table.
Tonne to Stone Converter
Convert tonnes to stone online. 1 t = 157.473044 st. Free, instant Tonne-to-Stone converter. Works both ways with a formula and reference table.
Ounce to Milligram Converter
Convert ounces to milligrams online. 1 oz = 28349.523125 mg. Free, instant Ounce-to-Milligram converter. Works both ways with a formula and reference table.
Ounce to Gram Converter
Convert ounces to grams online. 1 oz = 28.349523 g. Free, instant Ounce-to-Gram converter. Works both ways with a formula and reference table.
Ounce to Kilogram Converter
Convert ounces to kilograms online. 1 oz = 0.02834952 kg. Free, instant Ounce-to-Kilogram converter. Works both ways with a formula and reference table.
Ounce to Tonne Converter
Convert ounces to tonnes online. 1 oz = 2.834952e-5 t. Free, instant Ounce-to-Tonne converter. Works both ways with a formula and reference table.
Ounce to Pound Converter
Convert ounces to pounds online. 1 oz = 0.0625 lb. Free, instant Ounce-to-Pound converter. Works both ways with a formula and reference table.
Ounce to Stone Converter
Convert ounces to stone online. 1 oz = 0.00446429 st. Free, instant Ounce-to-Stone converter. Works both ways with a formula and reference table.
Pound to Milligram Converter
Convert pounds to milligrams online. 1 lb = 453592.37 mg. Free, instant Pound-to-Milligram converter. Works both ways with a formula and reference table.
Pound to Gram Converter
Convert pounds to grams online. 1 lb = 453.59237 g. Free, instant Pound-to-Gram converter. Works both ways with a formula and reference table.
Pound to Kilogram Converter
Convert pounds to kilograms online. 1 lb = 0.45359237 kg. Free, instant Pound-to-Kilogram converter. Works both ways with a formula and reference table.
Pound to Tonne Converter
Convert pounds to tonnes online. 1 lb = 0.00045359 t. Free, instant Pound-to-Tonne converter. Works both ways with a formula and reference table.
Pound to Ounce Converter
Convert pounds to ounces online. 1 lb = 16 oz. Free, instant Pound-to-Ounce converter. Works both ways with a formula and reference table.
Pound to Stone Converter
Convert pounds to stone online. 1 lb = 0.07142857 st. Free, instant Pound-to-Stone converter. Works both ways with a formula and reference table.
Stone to Milligram Converter
Convert stone to milligrams online. 1 st = 6350293.18 mg. Free, instant Stone-to-Milligram converter. Works both ways with a formula and reference table.
Stone to Gram Converter
Convert stone to grams online. 1 st = 6350.29318 g. Free, instant Stone-to-Gram converter. Works both ways with a formula and reference table.
Stone to Kilogram Converter
Convert stone to kilograms online. 1 st = 6.350293 kg. Free, instant Stone-to-Kilogram converter. Works both ways with a formula and reference table.
Stone to Tonne Converter
Convert stone to tonnes online. 1 st = 0.00635029 t. Free, instant Stone-to-Tonne converter. Works both ways with a formula and reference table.
Stone to Ounce Converter
Convert stone to ounces online. 1 st = 224 oz. Free, instant Stone-to-Ounce converter. Works both ways with a formula and reference table.
Stone to Pound Converter
Convert stone to pounds online. 1 st = 14 lb. Free, instant Stone-to-Pound converter. Works both ways with a formula and reference table.
Celsius to Fahrenheit Converter
Convert celsius to fahrenheit online. 100 °C = 212 °F. Free, instant Celsius-to-Fahrenheit converter. Works both ways with a formula and reference table.
Celsius to Kelvin Converter
Convert celsius to kelvin online. 100 °C = 373.15 K. Free, instant Celsius-to-Kelvin converter. Works both ways with a formula and reference table.
Fahrenheit to Celsius Converter
Convert fahrenheit to celsius online. 100 °F = 37.777778 °C. Free, instant Fahrenheit-to-Celsius converter. Works both ways with a formula and reference table.
Fahrenheit to Kelvin Converter
Convert fahrenheit to kelvin online. 100 °F = 310.927778 K. Free, instant Fahrenheit-to-Kelvin converter. Works both ways with a formula and reference table.
Kelvin to Celsius Converter
Convert kelvin to celsius online. 100 K = -173.15 °C. Free, instant Kelvin-to-Celsius converter. Works both ways with a formula and reference table.
Kelvin to Fahrenheit Converter
Convert kelvin to fahrenheit online. 100 K = -279.67 °F. Free, instant Kelvin-to-Fahrenheit converter. Works both ways with a formula and reference table.
Milliliter to Liter Converter
Convert milliliters to liters online. 1 mL = 0.001 L. Free, instant Milliliter-to-Liter converter. Works both ways with a formula and reference table.
Milliliter to Cubic Meter Converter
Convert milliliters to cubic meters online. 1 mL = 1.000000e-6 m³. Free, instant Milliliter-to-Cubic Meter converter. 100% in your browser, no uploads.
Milliliter to Teaspoon Converter
Convert milliliters to teaspoons online. 1 mL = 0.20288414 tsp. Free, instant Milliliter-to-Teaspoon converter. 100% in your browser, no uploads.
Milliliter to Tablespoon Converter
Convert milliliters to tablespoons online. 1 mL = 0.06762805 tbsp. Free, instant Milliliter-to-Tablespoon converter. 100% in your browser, no uploads.
Milliliter to Cup Converter
Convert milliliters to cups online. 1 mL = 0.00422675 cup. Free, instant Milliliter-to-Cup converter. Works both ways with a formula and reference table.
Milliliter to Pint Converter
Convert milliliters to pints online. 1 mL = 0.00211338 pt. Free, instant Milliliter-to-Pint converter. Works both ways with a formula and reference table.
Milliliter to Gallon Converter
Convert milliliters to gallons online. 1 mL = 0.00026417 gal. Free, instant Milliliter-to-Gallon converter. Works both ways with a formula and reference table.
Liter to Milliliter Converter
Convert liters to milliliters online. 1 L = 1000 mL. Free, instant Liter-to-Milliliter converter. Works both ways with a formula and reference table.
Liter to Cubic Meter Converter
Convert liters to cubic meters online. 1 L = 0.001 m³. Free, instant Liter-to-Cubic Meter converter. Works both ways with a formula and reference table.
Liter to Teaspoon Converter
Convert liters to teaspoons online. 1 L = 202.884136 tsp. Free, instant Liter-to-Teaspoon converter. Works both ways with a formula and reference table.
Liter to Tablespoon Converter
Convert liters to tablespoons online. 1 L = 67.628045 tbsp. Free, instant Liter-to-Tablespoon converter. Works both ways with a formula and reference table.
Liter to Cup Converter
Convert liters to cups online. 1 L = 4.226753 cup. Free, instant Liter-to-Cup converter. Works both ways with a formula and reference table.
Liter to Pint Converter
Convert liters to pints online. 1 L = 2.113376 pt. Free, instant Liter-to-Pint converter. Works both ways with a formula and reference table.
Liter to Gallon Converter
Convert liters to gallons online. 1 L = 0.26417205 gal. Free, instant Liter-to-Gallon converter. Works both ways with a formula and reference table.
Cubic Meter to Milliliter Converter
Convert cubic meters to milliliters online. 1 m³ = 1000000 mL. Free, instant Cubic Meter-to-Milliliter converter. 100% in your browser, no uploads.
Cubic Meter to Liter Converter
Convert cubic meters to liters online. 1 m³ = 1000 L. Free, instant Cubic Meter-to-Liter converter. Works both ways with a formula and reference table.
Cubic Meter to Teaspoon Converter
Convert cubic meters to teaspoons online. 1 m³ = 202884.136211 tsp. Free, instant Cubic Meter-to-Teaspoon converter. 100% in your browser, no uploads.
Cubic Meter to Tablespoon Converter
Convert cubic meters to tablespoons online. 1 m³ = 67628.045404 tbsp. Free, instant Cubic Meter-to-Tablespoon converter.
Cubic Meter to Cup Converter
Convert cubic meters to cups online. 1 m³ = 4226.752838 cup. Free, instant Cubic Meter-to-Cup converter. Works both ways with a formula and reference table.
Cubic Meter to Pint Converter
Convert cubic meters to pints online. 1 m³ = 2113.376419 pt. Free, instant Cubic Meter-to-Pint converter. Works both ways with a formula and reference table.
Cubic Meter to Gallon Converter
Convert cubic meters to gallons online. 1 m³ = 264.172052 gal. Free, instant Cubic Meter-to-Gallon converter. 100% in your browser, no uploads.
Teaspoon to Milliliter Converter
Convert teaspoons to milliliters online. 1 tsp = 4.928922 mL. Free, instant Teaspoon-to-Milliliter converter. 100% in your browser, no uploads.
Teaspoon to Liter Converter
Convert teaspoons to liters online. 1 tsp = 0.00492892 L. Free, instant Teaspoon-to-Liter converter. Works both ways with a formula and reference table.
Teaspoon to Cubic Meter Converter
Convert teaspoons to cubic meters online. 1 tsp = 4.928922e-6 m³. Free, instant Teaspoon-to-Cubic Meter converter. 100% in your browser, no uploads.
Teaspoon to Tablespoon Converter
Convert teaspoons to tablespoons online. 1 tsp = 0.33333333 tbsp. Free, instant Teaspoon-to-Tablespoon converter. 100% in your browser, no uploads.
Teaspoon to Cup Converter
Convert teaspoons to cups online. 1 tsp = 0.02083333 cup. Free, instant Teaspoon-to-Cup converter. Works both ways with a formula and reference table.
Teaspoon to Pint Converter
Convert teaspoons to pints online. 1 tsp = 0.01041667 pt. Free, instant Teaspoon-to-Pint converter. Works both ways with a formula and reference table.
Teaspoon to Gallon Converter
Convert teaspoons to gallons online. 1 tsp = 0.00130208 gal. Free, instant Teaspoon-to-Gallon converter. Works both ways with a formula and reference table.
Tablespoon to Milliliter Converter
Convert tablespoons to milliliters online. 1 tbsp = 14.786765 mL. Free, instant Tablespoon-to-Milliliter converter. 100% in your browser, no uploads.
Tablespoon to Liter Converter
Convert tablespoons to liters online. 1 tbsp = 0.01478676 L. Free, instant Tablespoon-to-Liter converter. Works both ways with a formula and reference table.
Tablespoon to Cubic Meter Converter
Convert tablespoons to cubic meters online. 1 tbsp = 1.478676e-5 m³. Free, instant Tablespoon-to-Cubic Meter converter. 100% in your browser, no uploads.
Tablespoon to Teaspoon Converter
Convert tablespoons to teaspoons online. 1 tbsp = 3 tsp. Free, instant Tablespoon-to-Teaspoon converter. Works both ways with a formula and reference table.
Tablespoon to Cup Converter
Convert tablespoons to cups online. 1 tbsp = 0.0625 cup. Free, instant Tablespoon-to-Cup converter. Works both ways with a formula and reference table.
Tablespoon to Pint Converter
Convert tablespoons to pints online. 1 tbsp = 0.03125 pt. Free, instant Tablespoon-to-Pint converter. Works both ways with a formula and reference table.
Tablespoon to Gallon Converter
Convert tablespoons to gallons online. 1 tbsp = 0.00390625 gal. Free, instant Tablespoon-to-Gallon converter. 100% in your browser, no uploads.
Cup to Milliliter Converter
Convert cups to milliliters online. 1 cup = 236.588236 mL. Free, instant Cup-to-Milliliter converter. Works both ways with a formula and reference table.
Cup to Liter Converter
Convert cups to liters online. 1 cup = 0.23658824 L. Free, instant Cup-to-Liter converter. Works both ways with a formula and reference table.
Cup to Cubic Meter Converter
Convert cups to cubic meters online. 1 cup = 0.00023659 m³. Free, instant Cup-to-Cubic Meter converter. Works both ways with a formula and reference table.
Cup to Teaspoon Converter
Convert cups to teaspoons online. 1 cup = 48 tsp. Free, instant Cup-to-Teaspoon converter. Works both ways with a formula and reference table.
Cup to Tablespoon Converter
Convert cups to tablespoons online. 1 cup = 16 tbsp. Free, instant Cup-to-Tablespoon converter. Works both ways with a formula and reference table.
Cup to Pint Converter
Convert cups to pints online. 1 cup = 0.5 pt. Free, instant Cup-to-Pint converter. Works both ways with a formula and reference table.
Cup to Gallon Converter
Convert cups to gallons online. 1 cup = 0.0625 gal. Free, instant Cup-to-Gallon converter. Works both ways with a formula and reference table.
Pint to Milliliter Converter
Convert pints to milliliters online. 1 pt = 473.176473 mL. Free, instant Pint-to-Milliliter converter. Works both ways with a formula and reference table.
Pint to Liter Converter
Convert pints to liters online. 1 pt = 0.47317647 L. Free, instant Pint-to-Liter converter. Works both ways with a formula and reference table.
Pint to Cubic Meter Converter
Convert pints to cubic meters online. 1 pt = 0.00047318 m³. Free, instant Pint-to-Cubic Meter converter. Works both ways with a formula and reference table.
Pint to Teaspoon Converter
Convert pints to teaspoons online. 1 pt = 96 tsp. Free, instant Pint-to-Teaspoon converter. Works both ways with a formula and reference table.
Pint to Tablespoon Converter
Convert pints to tablespoons online. 1 pt = 32 tbsp. Free, instant Pint-to-Tablespoon converter. Works both ways with a formula and reference table.
Pint to Cup Converter
Convert pints to cups online. 1 pt = 2 cup. Free, instant Pint-to-Cup converter. Works both ways with a formula and reference table.
Pint to Gallon Converter
Convert pints to gallons online. 1 pt = 0.125 gal. Free, instant Pint-to-Gallon converter. Works both ways with a formula and reference table.
Gallon to Milliliter Converter
Convert gallons to milliliters online. 1 gal = 3785.411784 mL. Free, instant Gallon-to-Milliliter converter. Works both ways with a formula and reference table.
Gallon to Liter Converter
Convert gallons to liters online. 1 gal = 3.785412 L. Free, instant Gallon-to-Liter converter. Works both ways with a formula and reference table.
Gallon to Cubic Meter Converter
Convert gallons to cubic meters online. 1 gal = 0.00378541 m³. Free, instant Gallon-to-Cubic Meter converter. 100% in your browser, no uploads.
Gallon to Teaspoon Converter
Convert gallons to teaspoons online. 1 gal = 768 tsp. Free, instant Gallon-to-Teaspoon converter. Works both ways with a formula and reference table.
Gallon to Tablespoon Converter
Convert gallons to tablespoons online. 1 gal = 256 tbsp. Free, instant Gallon-to-Tablespoon converter. Works both ways with a formula and reference table.
Gallon to Cup Converter
Convert gallons to cups online. 1 gal = 16 cup. Free, instant Gallon-to-Cup converter. Works both ways with a formula and reference table.
Gallon to Pint Converter
Convert gallons to pints online. 1 gal = 8 pt. Free, instant Gallon-to-Pint converter. Works both ways with a formula and reference table.
Square Meter to Square Kilometer Converter
Convert square meters to square kilometers online. 1 m² = 1.000000e-6 km². Free, instant Square Meter-to-Square Kilometer converter.
Square Meter to Square Foot Converter
Convert square meters to square feet online. 1 m² = 10.76391 ft². Free, instant Square Meter-to-Square Foot converter. 100% in your browser, no uploads.
Square Meter to Square Yard Converter
Convert square meters to square yards online. 1 m² = 1.19599 yd². Free, instant Square Meter-to-Square Yard converter. 100% in your browser, no uploads.
Square Meter to Acre Converter
Convert square meters to acres online. 1 m² = 0.00024711 ac. Free, instant Square Meter-to-Acre converter. Works both ways with a formula and reference table.
Square Meter to Hectare Converter
Convert square meters to hectares online. 1 m² = 0.0001 ha. Free, instant Square Meter-to-Hectare converter. Works both ways with a formula and reference table.
Square Meter to Square Mile Converter
Convert square meters to square miles online. 1 m² = 3.861022e-7 mi². Free, instant Square Meter-to-Square Mile converter.
Square Kilometer to Square Meter Converter
Convert square kilometers to square meters online. 1 km² = 1000000 m². Free, instant Square Kilometer-to-Square Meter converter.
Square Kilometer to Square Foot Converter
Convert square kilometers to square feet online. 1 km² = 10763910.41671 ft². Free, instant Square Kilometer-to-Square Foot converter.
Square Kilometer to Square Yard Converter
Convert square kilometers to square yards online. 1 km² = 1195990.046301 yd². Free, instant Square Kilometer-to-Square Yard converter.
Square Kilometer to Acre Converter
Convert square kilometers to acres online. 1 km² = 247.105381 ac. Free, instant Square Kilometer-to-Acre converter. 100% in your browser, no uploads.
Square Kilometer to Hectare Converter
Convert square kilometers to hectares online. 1 km² = 100 ha. Free, instant Square Kilometer-to-Hectare converter. 100% in your browser, no uploads.
Square Kilometer to Square Mile Converter
Convert square kilometers to square miles online. 1 km² = 0.38610216 mi². Free, instant Square Kilometer-to-Square Mile converter.
Square Foot to Square Meter Converter
Convert square feet to square meters online. 1 ft² = 0.09290304 m². Free, instant Square Foot-to-Square Meter converter.
Square Foot to Square Kilometer Converter
Convert square feet to square kilometers online. 1 ft² = 9.290304e-8 km². Free, instant Square Foot-to-Square Kilometer converter.
Square Foot to Square Yard Converter
Convert square feet to square yards online. 1 ft² = 0.11111111 yd². Free, instant Square Foot-to-Square Yard converter. 100% in your browser, no uploads.
Square Foot to Acre Converter
Convert square feet to acres online. 1 ft² = 2.295684e-5 ac. Free, instant Square Foot-to-Acre converter. Works both ways with a formula and reference table.
Square Foot to Hectare Converter
Convert square feet to hectares online. 1 ft² = 9.290304e-6 ha. Free, instant Square Foot-to-Hectare converter. 100% in your browser, no uploads.
Square Foot to Square Mile Converter
Convert square feet to square miles online. 1 ft² = 3.587006e-8 mi². Free, instant Square Foot-to-Square Mile converter.
Square Yard to Square Meter Converter
Convert square yards to square meters online. 1 yd² = 0.83612736 m². Free, instant Square Yard-to-Square Meter converter.
Square Yard to Square Kilometer Converter
Convert square yards to square kilometers online. 1 yd² = 8.361274e-7 km². Free, instant Square Yard-to-Square Kilometer converter.
Square Yard to Square Foot Converter
Convert square yards to square feet online. 1 yd² = 9 ft². Free, instant Square Yard-to-Square Foot converter. 100% in your browser, no uploads.
Square Yard to Acre Converter
Convert square yards to acres online. 1 yd² = 0.00020661 ac. Free, instant Square Yard-to-Acre converter. Works both ways with a formula and reference table.
Square Yard to Hectare Converter
Convert square yards to hectares online. 1 yd² = 8.361274e-5 ha. Free, instant Square Yard-to-Hectare converter. 100% in your browser, no uploads.
Square Yard to Square Mile Converter
Convert square yards to square miles online. 1 yd² = 3.228306e-7 mi². Free, instant Square Yard-to-Square Mile converter.
Acre to Square Meter Converter
Convert acres to square meters online. 1 ac = 4046.856422 m². Free, instant Acre-to-Square Meter converter. Works both ways with a formula and reference table.
Acre to Square Kilometer Converter
Convert acres to square kilometers online. 1 ac = 0.00404686 km². Free, instant Acre-to-Square Kilometer converter. 100% in your browser, no uploads.
Acre to Square Foot Converter
Convert acres to square feet online. 1 ac = 43560 ft². Free, instant Acre-to-Square Foot converter. Works both ways with a formula and reference table.
Acre to Square Yard Converter
Convert acres to square yards online. 1 ac = 4840 yd². Free, instant Acre-to-Square Yard converter. Works both ways with a formula and reference table.
Acre to Hectare Converter
Convert acres to hectares online. 1 ac = 0.40468564 ha. Free, instant Acre-to-Hectare converter. Works both ways with a formula and reference table.
Acre to Square Mile Converter
Convert acres to square miles online. 1 ac = 0.0015625 mi². Free, instant Acre-to-Square Mile converter. Works both ways with a formula and reference table.
Hectare to Square Meter Converter
Convert hectares to square meters online. 1 ha = 10000 m². Free, instant Hectare-to-Square Meter converter. Works both ways with a formula and reference table.
Hectare to Square Kilometer Converter
Convert hectares to square kilometers online. 1 ha = 0.01 km². Free, instant Hectare-to-Square Kilometer converter. 100% in your browser, no uploads.
Hectare to Square Foot Converter
Convert hectares to square feet online. 1 ha = 107639.104167 ft². Free, instant Hectare-to-Square Foot converter. 100% in your browser, no uploads.
Hectare to Square Yard Converter
Convert hectares to square yards online. 1 ha = 11959.900463 yd². Free, instant Hectare-to-Square Yard converter. 100% in your browser, no uploads.
Hectare to Acre Converter
Convert hectares to acres online. 1 ha = 2.471054 ac. Free, instant Hectare-to-Acre converter. Works both ways with a formula and reference table.
Hectare to Square Mile Converter
Convert hectares to square miles online. 1 ha = 0.00386102 mi². Free, instant Hectare-to-Square Mile converter. 100% in your browser, no uploads.
Square Mile to Square Meter Converter
Convert square miles to square meters online. 1 mi² = 2589988.110336 m². Free, instant Square Mile-to-Square Meter converter.
Square Mile to Square Kilometer Converter
Convert square miles to square kilometers online. 1 mi² = 2.589988 km². Free, instant Square Mile-to-Square Kilometer converter.
Square Mile to Square Foot Converter
Convert square miles to square feet online. 1 mi² = 27878400 ft². Free, instant Square Mile-to-Square Foot converter. 100% in your browser, no uploads.
Square Mile to Square Yard Converter
Convert square miles to square yards online. 1 mi² = 3097600 yd². Free, instant Square Mile-to-Square Yard converter. 100% in your browser, no uploads.
Square Mile to Acre Converter
Convert square miles to acres online. 1 mi² = 640 ac. Free, instant Square Mile-to-Acre converter. Works both ways with a formula and reference table.
Square Mile to Hectare Converter
Convert square miles to hectares online. 1 mi² = 258.998811 ha. Free, instant Square Mile-to-Hectare converter. 100% in your browser, no uploads.
Meter per Second to Kilometer per Hour Converter
Convert meters per second to kilometers per hour online. 1 m/s = 3.6 km/h. Free, instant Meter per Second-to-Kilometer per Hour converter.
Meter per Second to Mile per Hour Converter
Convert meters per second to miles per hour online. 1 m/s = 2.236936 mph. Free, instant Meter per Second-to-Mile per Hour converter.
Meter per Second to Knot Converter
Convert meters per second to knots online. 1 m/s = 1.943844 kn. Free, instant Meter per Second-to-Knot converter. 100% in your browser, no uploads.
Meter per Second to Foot per Second Converter
Convert meters per second to feet per second online. 1 m/s = 3.28084 ft/s. Free, instant Meter per Second-to-Foot per Second converter.
Kilometer per Hour to Meter per Second Converter
Convert kilometers per hour to meters per second online. 1 km/h = 0.27777778 m/s. Free, instant Kilometer per Hour-to-Meter per Second converter.
Kilometer per Hour to Mile per Hour Converter
Convert kilometers per hour to miles per hour online. 1 km/h = 0.62137119 mph. Free, instant Kilometer per Hour-to-Mile per Hour converter.
Kilometer per Hour to Knot Converter
Convert kilometers per hour to knots online. 1 km/h = 0.5399568 kn. Free, instant Kilometer per Hour-to-Knot converter. 100% in your browser, no uploads.
Kilometer per Hour to Foot per Second Converter
Convert kilometers per hour to feet per second online. 1 km/h = 0.91134442 ft/s. Free, instant Kilometer per Hour-to-Foot per Second converter.
Mile per Hour to Meter per Second Converter
Convert miles per hour to meters per second online. 1 mph = 0.44704 m/s. Free, instant Mile per Hour-to-Meter per Second converter.
Mile per Hour to Kilometer per Hour Converter
Convert miles per hour to kilometers per hour online. 1 mph = 1.609344 km/h. Free, instant Mile per Hour-to-Kilometer per Hour converter.
Mile per Hour to Knot Converter
Convert miles per hour to knots online. 1 mph = 0.86897624 kn. Free, instant Mile per Hour-to-Knot converter. 100% in your browser, no uploads.
Mile per Hour to Foot per Second Converter
Convert miles per hour to feet per second online. 1 mph = 1.466667 ft/s. Free, instant Mile per Hour-to-Foot per Second converter.
Knot to Meter per Second Converter
Convert knots to meters per second online. 1 kn = 0.51444444 m/s. Free, instant Knot-to-Meter per Second converter. 100% in your browser, no uploads.
Knot to Kilometer per Hour Converter
Convert knots to kilometers per hour online. 1 kn = 1.852 km/h. Free, instant Knot-to-Kilometer per Hour converter. 100% in your browser, no uploads.
Knot to Mile per Hour Converter
Convert knots to miles per hour online. 1 kn = 1.150779 mph. Free, instant Knot-to-Mile per Hour converter. Works both ways with a formula and reference table.
Knot to Foot per Second Converter
Convert knots to feet per second online. 1 kn = 1.68781 ft/s. Free, instant Knot-to-Foot per Second converter. 100% in your browser, no uploads.
Foot per Second to Meter per Second Converter
Convert feet per second to meters per second online. 1 ft/s = 0.3048 m/s. Free, instant Foot per Second-to-Meter per Second converter.
Foot per Second to Kilometer per Hour Converter
Convert feet per second to kilometers per hour online. 1 ft/s = 1.09728 km/h. Free, instant Foot per Second-to-Kilometer per Hour converter.
Foot per Second to Mile per Hour Converter
Convert feet per second to miles per hour online. 1 ft/s = 0.68181818 mph. Free, instant Foot per Second-to-Mile per Hour converter.
Foot per Second to Knot Converter
Convert feet per second to knots online. 1 ft/s = 0.5924838 kn. Free, instant Foot per Second-to-Knot converter. 100% in your browser, no uploads.
Second to Minute Converter
Convert seconds to minutes online. 1 s = 0.01666667 min. Free, instant Second-to-Minute converter. Works both ways with a formula and reference table.
Second to Hour Converter
Convert seconds to hours online. 1 s = 0.00027778 h. Free, instant Second-to-Hour converter. Works both ways with a formula and reference table.
Second to Day Converter
Convert seconds to days online. 1 s = 1.157407e-5 d. Free, instant Second-to-Day converter. Works both ways with a formula and reference table.
Second to Week Converter
Convert seconds to weeks online. 1 s = 1.653439e-6 wk. Free, instant Second-to-Week converter. Works both ways with a formula and reference table.
Second to Month Converter
Convert seconds to months online. 1 s = 3.802571e-7 mo. Free, instant Second-to-Month converter. Works both ways with a formula and reference table.
Second to Year Converter
Convert seconds to years online. 1 s = 3.168809e-8 yr. Free, instant Second-to-Year converter. Works both ways with a formula and reference table.
Minute to Second Converter
Convert minutes to seconds online. 1 min = 60 s. Free, instant Minute-to-Second converter. Works both ways with a formula and reference table.
Minute to Hour Converter
Convert minutes to hours online. 1 min = 0.01666667 h. Free, instant Minute-to-Hour converter. Works both ways with a formula and reference table.
Minute to Day Converter
Convert minutes to days online. 1 min = 0.00069444 d. Free, instant Minute-to-Day converter. Works both ways with a formula and reference table.
Minute to Week Converter
Convert minutes to weeks online. 1 min = 9.920635e-5 wk. Free, instant Minute-to-Week converter. Works both ways with a formula and reference table.
Minute to Month Converter
Convert minutes to months online. 1 min = 2.281542e-5 mo. Free, instant Minute-to-Month converter. Works both ways with a formula and reference table.
Minute to Year Converter
Convert minutes to years online. 1 min = 1.901285e-6 yr. Free, instant Minute-to-Year converter. Works both ways with a formula and reference table.
Hour to Second Converter
Convert hours to seconds online. 1 h = 3600 s. Free, instant Hour-to-Second converter. Works both ways with a formula and reference table.
Hour to Minute Converter
Convert hours to minutes online. 1 h = 60 min. Free, instant Hour-to-Minute converter. Works both ways with a formula and reference table.
Hour to Day Converter
Convert hours to days online. 1 h = 0.04166667 d. Free, instant Hour-to-Day converter. Works both ways with a formula and reference table.
Hour to Week Converter
Convert hours to weeks online. 1 h = 0.00595238 wk. Free, instant Hour-to-Week converter. Works both ways with a formula and reference table.
Hour to Month Converter
Convert hours to months online. 1 h = 0.00136893 mo. Free, instant Hour-to-Month converter. Works both ways with a formula and reference table.
Hour to Year Converter
Convert hours to years online. 1 h = 0.00011408 yr. Free, instant Hour-to-Year converter. Works both ways with a formula and reference table.
Day to Second Converter
Convert days to seconds online. 1 d = 86400 s. Free, instant Day-to-Second converter. Works both ways with a formula and reference table.
Day to Minute Converter
Convert days to minutes online. 1 d = 1440 min. Free, instant Day-to-Minute converter. Works both ways with a formula and reference table.
Day to Hour Converter
Convert days to hours online. 1 d = 24 h. Free, instant Day-to-Hour converter. Works both ways with a formula and reference table.
Day to Week Converter
Convert days to weeks online. 1 d = 0.14285714 wk. Free, instant Day-to-Week converter. Works both ways with a formula and reference table.
Day to Month Converter
Convert days to months online. 1 d = 0.03285421 mo. Free, instant Day-to-Month converter. Works both ways with a formula and reference table.
Day to Year Converter
Convert days to years online. 1 d = 0.00273785 yr. Free, instant Day-to-Year converter. Works both ways with a formula and reference table.
Week to Second Converter
Convert weeks to seconds online. 1 wk = 604800 s. Free, instant Week-to-Second converter. Works both ways with a formula and reference table.
Week to Minute Converter
Convert weeks to minutes online. 1 wk = 10080 min. Free, instant Week-to-Minute converter. Works both ways with a formula and reference table.
Week to Hour Converter
Convert weeks to hours online. 1 wk = 168 h. Free, instant Week-to-Hour converter. Works both ways with a formula and reference table.
Week to Day Converter
Convert weeks to days online. 1 wk = 7 d. Free, instant Week-to-Day converter. Works both ways with a formula and reference table.
Week to Month Converter
Convert weeks to months online. 1 wk = 0.22997947 mo. Free, instant Week-to-Month converter. Works both ways with a formula and reference table.
Week to Year Converter
Convert weeks to years online. 1 wk = 0.01916496 yr. Free, instant Week-to-Year converter. Works both ways with a formula and reference table.
Month to Second Converter
Convert months to seconds online. 1 mo = 2629800 s. Free, instant Month-to-Second converter. Works both ways with a formula and reference table.
Month to Minute Converter
Convert months to minutes online. 1 mo = 43830 min. Free, instant Month-to-Minute converter. Works both ways with a formula and reference table.
Month to Hour Converter
Convert months to hours online. 1 mo = 730.5 h. Free, instant Month-to-Hour converter. Works both ways with a formula and reference table.
Month to Day Converter
Convert months to days online. 1 mo = 30.4375 d. Free, instant Month-to-Day converter. Works both ways with a formula and reference table.
Month to Week Converter
Convert months to weeks online. 1 mo = 4.348214 wk. Free, instant Month-to-Week converter. Works both ways with a formula and reference table.
Month to Year Converter
Convert months to years online. 1 mo = 0.08333333 yr. Free, instant Month-to-Year converter. Works both ways with a formula and reference table.
Year to Second Converter
Convert years to seconds online. 1 yr = 31557600 s. Free, instant Year-to-Second converter. Works both ways with a formula and reference table.
Year to Minute Converter
Convert years to minutes online. 1 yr = 525960 min. Free, instant Year-to-Minute converter. Works both ways with a formula and reference table.
Year to Hour Converter
Convert years to hours online. 1 yr = 8766 h. Free, instant Year-to-Hour converter. Works both ways with a formula and reference table.
Year to Day Converter
Convert years to days online. 1 yr = 365.25 d. Free, instant Year-to-Day converter. Works both ways with a formula and reference table.
Year to Week Converter
Convert years to weeks online. 1 yr = 52.178571 wk. Free, instant Year-to-Week converter. Works both ways with a formula and reference table.
Year to Month Converter
Convert years to months online. 1 yr = 12 mo. Free, instant Year-to-Month converter. Works both ways with a formula and reference table.
Bit to Byte Converter
Convert bits to bytes online. 1 bit = 0.125 B. Free, instant Bit-to-Byte converter. Works both ways with a formula and reference table.
Bit to Kilobyte Converter
Convert bits to kilobytes online. 1 bit = 0.000125 KB. Free, instant Bit-to-Kilobyte converter. Works both ways with a formula and reference table.
Bit to Megabyte Converter
Convert bits to megabytes online. 1 bit = 1.250000e-7 MB. Free, instant Bit-to-Megabyte converter. Works both ways with a formula and reference table.
Bit to Gigabyte Converter
Convert bits to gigabytes online. 1 bit = 1.250000e-10 GB. Free, instant Bit-to-Gigabyte converter. Works both ways with a formula and reference table.
Bit to Terabyte Converter
Convert bits to terabytes online. 1 bit = 1.250000e-13 TB. Free, instant Bit-to-Terabyte converter. Works both ways with a formula and reference table.
Bit to Petabyte Converter
Convert bits to petabytes online. 1 bit = 1.250000e-16 PB. Free, instant Bit-to-Petabyte converter. Works both ways with a formula and reference table.
Byte to Bit Converter
Convert bytes to bits online. 1 B = 8 bit. Free, instant Byte-to-Bit converter. Works both ways with a formula and reference table.
Byte to Kilobyte Converter
Convert bytes to kilobytes online. 1 B = 0.001 KB. Free, instant Byte-to-Kilobyte converter. Works both ways with a formula and reference table.
Byte to Megabyte Converter
Convert bytes to megabytes online. 1 B = 1.000000e-6 MB. Free, instant Byte-to-Megabyte converter. Works both ways with a formula and reference table.
Byte to Gigabyte Converter
Convert bytes to gigabytes online. 1 B = 1.000000e-9 GB. Free, instant Byte-to-Gigabyte converter. Works both ways with a formula and reference table.
Byte to Terabyte Converter
Convert bytes to terabytes online. 1 B = 1.000000e-12 TB. Free, instant Byte-to-Terabyte converter. Works both ways with a formula and reference table.
Byte to Petabyte Converter
Convert bytes to petabytes online. 1 B = 1.000000e-15 PB. Free, instant Byte-to-Petabyte converter. Works both ways with a formula and reference table.
Kilobyte to Bit Converter
Convert kilobytes to bits online. 1 KB = 8000 bit. Free, instant Kilobyte-to-Bit converter. Works both ways with a formula and reference table.
Kilobyte to Byte Converter
Convert kilobytes to bytes online. 1 KB = 1000 B. Free, instant Kilobyte-to-Byte converter. Works both ways with a formula and reference table.
Kilobyte to Megabyte Converter
Convert kilobytes to megabytes online. 1 KB = 0.001 MB. Free, instant Kilobyte-to-Megabyte converter. Works both ways with a formula and reference table.
Kilobyte to Gigabyte Converter
Convert kilobytes to gigabytes online. 1 KB = 1.000000e-6 GB. Free, instant Kilobyte-to-Gigabyte converter. Works both ways with a formula and reference table.
Kilobyte to Terabyte Converter
Convert kilobytes to terabytes online. 1 KB = 1.000000e-9 TB. Free, instant Kilobyte-to-Terabyte converter. Works both ways with a formula and reference table.
Kilobyte to Petabyte Converter
Convert kilobytes to petabytes online. 1 KB = 1.000000e-12 PB. Free, instant Kilobyte-to-Petabyte converter. Works both ways with a formula and reference table.
Megabyte to Bit Converter
Convert megabytes to bits online. 1 MB = 8000000 bit. Free, instant Megabyte-to-Bit converter. Works both ways with a formula and reference table.
Megabyte to Byte Converter
Convert megabytes to bytes online. 1 MB = 1000000 B. Free, instant Megabyte-to-Byte converter. Works both ways with a formula and reference table.
Megabyte to Kilobyte Converter
Convert megabytes to kilobytes online. 1 MB = 1000 KB. Free, instant Megabyte-to-Kilobyte converter. Works both ways with a formula and reference table.
Megabyte to Gigabyte Converter
Convert megabytes to gigabytes online. 1 MB = 0.001 GB. Free, instant Megabyte-to-Gigabyte converter. Works both ways with a formula and reference table.
Megabyte to Terabyte Converter
Convert megabytes to terabytes online. 1 MB = 1.000000e-6 TB. Free, instant Megabyte-to-Terabyte converter. Works both ways with a formula and reference table.
Megabyte to Petabyte Converter
Convert megabytes to petabytes online. 1 MB = 1.000000e-9 PB. Free, instant Megabyte-to-Petabyte converter. Works both ways with a formula and reference table.
Gigabyte to Bit Converter
Convert gigabytes to bits online. 1 GB = 8000000000 bit. Free, instant Gigabyte-to-Bit converter. Works both ways with a formula and reference table.
Gigabyte to Byte Converter
Convert gigabytes to bytes online. 1 GB = 1000000000 B. Free, instant Gigabyte-to-Byte converter. Works both ways with a formula and reference table.
Gigabyte to Kilobyte Converter
Convert gigabytes to kilobytes online. 1 GB = 1000000 KB. Free, instant Gigabyte-to-Kilobyte converter. Works both ways with a formula and reference table.
Gigabyte to Megabyte Converter
Convert gigabytes to megabytes online. 1 GB = 1000 MB. Free, instant Gigabyte-to-Megabyte converter. Works both ways with a formula and reference table.
Gigabyte to Terabyte Converter
Convert gigabytes to terabytes online. 1 GB = 0.001 TB. Free, instant Gigabyte-to-Terabyte converter. Works both ways with a formula and reference table.
Gigabyte to Petabyte Converter
Convert gigabytes to petabytes online. 1 GB = 1.000000e-6 PB. Free, instant Gigabyte-to-Petabyte converter. Works both ways with a formula and reference table.
Terabyte to Bit Converter
Convert terabytes to bits online. 1 TB = 8000000000000 bit. Free, instant Terabyte-to-Bit converter. Works both ways with a formula and reference table.
Terabyte to Byte Converter
Convert terabytes to bytes online. 1 TB = 1000000000000 B. Free, instant Terabyte-to-Byte converter. Works both ways with a formula and reference table.
Terabyte to Kilobyte Converter
Convert terabytes to kilobytes online. 1 TB = 1000000000 KB. Free, instant Terabyte-to-Kilobyte converter. Works both ways with a formula and reference table.
Terabyte to Megabyte Converter
Convert terabytes to megabytes online. 1 TB = 1000000 MB. Free, instant Terabyte-to-Megabyte converter. Works both ways with a formula and reference table.
Terabyte to Gigabyte Converter
Convert terabytes to gigabytes online. 1 TB = 1000 GB. Free, instant Terabyte-to-Gigabyte converter. Works both ways with a formula and reference table.
Terabyte to Petabyte Converter
Convert terabytes to petabytes online. 1 TB = 0.001 PB. Free, instant Terabyte-to-Petabyte converter. Works both ways with a formula and reference table.
Petabyte to Bit Converter
Convert petabytes to bits online. 1 PB = 8.000000e+15 bit. Free, instant Petabyte-to-Bit converter. Works both ways with a formula and reference table.
Petabyte to Byte Converter
Convert petabytes to bytes online. 1 PB = 1.000000e+15 B. Free, instant Petabyte-to-Byte converter. Works both ways with a formula and reference table.
Petabyte to Kilobyte Converter
Convert petabytes to kilobytes online. 1 PB = 1000000000000 KB. Free, instant Petabyte-to-Kilobyte converter. 100% in your browser, no uploads.
Petabyte to Megabyte Converter
Convert petabytes to megabytes online. 1 PB = 1000000000 MB. Free, instant Petabyte-to-Megabyte converter. Works both ways with a formula and reference table.
Petabyte to Gigabyte Converter
Convert petabytes to gigabytes online. 1 PB = 1000000 GB. Free, instant Petabyte-to-Gigabyte converter. Works both ways with a formula and reference table.
Petabyte to Terabyte Converter
Convert petabytes to terabytes online. 1 PB = 1000 TB. Free, instant Petabyte-to-Terabyte converter. Works both ways with a formula and reference table.
Pascal to Kilopascal Converter
Convert pascals to kilopascals online. 1 Pa = 0.001 kPa. Free, instant Pascal-to-Kilopascal converter. Works both ways with a formula and reference table.
Pascal to Bar Converter
Convert pascals to bar online. 1 Pa = 1.000000e-5 bar. Free, instant Pascal-to-Bar converter. Works both ways with a formula and reference table.
Pascal to PSI Converter
Convert pascals to psi online. 1 Pa = 0.00014504 psi. Free, instant Pascal-to-PSI converter. Works both ways with a formula and reference table.
Pascal to Atmosphere Converter
Convert pascals to atmospheres online. 1 Pa = 9.869233e-6 atm. Free, instant Pascal-to-Atmosphere converter. Works both ways with a formula and reference table.
Kilopascal to Pascal Converter
Convert kilopascals to pascals online. 1 kPa = 1000 Pa. Free, instant Kilopascal-to-Pascal converter. Works both ways with a formula and reference table.
Kilopascal to Bar Converter
Convert kilopascals to bar online. 1 kPa = 0.01 bar. Free, instant Kilopascal-to-Bar converter. Works both ways with a formula and reference table.
Kilopascal to PSI Converter
Convert kilopascals to psi online. 1 kPa = 0.14503774 psi. Free, instant Kilopascal-to-PSI converter. Works both ways with a formula and reference table.
Kilopascal to Atmosphere Converter
Convert kilopascals to atmospheres online. 1 kPa = 0.00986923 atm. Free, instant Kilopascal-to-Atmosphere converter. 100% in your browser, no uploads.
Bar to Pascal Converter
Convert bar to pascals online. 1 bar = 100000 Pa. Free, instant Bar-to-Pascal converter. Works both ways with a formula and reference table.
Bar to Kilopascal Converter
Convert bar to kilopascals online. 1 bar = 100 kPa. Free, instant Bar-to-Kilopascal converter. Works both ways with a formula and reference table.
Bar to PSI Converter
Convert bar to psi online. 1 bar = 14.503774 psi. Free, instant Bar-to-PSI converter. Works both ways with a formula and reference table.
Bar to Atmosphere Converter
Convert bar to atmospheres online. 1 bar = 0.98692327 atm. Free, instant Bar-to-Atmosphere converter. Works both ways with a formula and reference table.
PSI to Pascal Converter
Convert psi to pascals online. 1 psi = 6894.757293 Pa. Free, instant PSI-to-Pascal converter. Works both ways with a formula and reference table.
PSI to Kilopascal Converter
Convert psi to kilopascals online. 1 psi = 6.894757 kPa. Free, instant PSI-to-Kilopascal converter. Works both ways with a formula and reference table.
PSI to Bar Converter
Convert psi to bar online. 1 psi = 0.06894757 bar. Free, instant PSI-to-Bar converter. Works both ways with a formula and reference table.
PSI to Atmosphere Converter
Convert psi to atmospheres online. 1 psi = 0.06804596 atm. Free, instant PSI-to-Atmosphere converter. Works both ways with a formula and reference table.
Atmosphere to Pascal Converter
Convert atmospheres to pascals online. 1 atm = 101325 Pa. Free, instant Atmosphere-to-Pascal converter. Works both ways with a formula and reference table.
Atmosphere to Kilopascal Converter
Convert atmospheres to kilopascals online. 1 atm = 101.325 kPa. Free, instant Atmosphere-to-Kilopascal converter. 100% in your browser, no uploads.
Atmosphere to Bar Converter
Convert atmospheres to bar online. 1 atm = 1.01325 bar. Free, instant Atmosphere-to-Bar converter. Works both ways with a formula and reference table.
Atmosphere to PSI Converter
Convert atmospheres to psi online. 1 atm = 14.695949 psi. Free, instant Atmosphere-to-PSI converter. Works both ways with a formula and reference table.
Joule to Kilojoule Converter
Convert joules to kilojoules online. 1 J = 0.001 kJ. Free, instant Joule-to-Kilojoule converter. Works both ways with a formula and reference table.
Joule to Calorie Converter
Convert joules to calories online. 1 J = 0.23900574 cal. Free, instant Joule-to-Calorie converter. Works both ways with a formula and reference table.
Joule to Kilocalorie Converter
Convert joules to kilocalories online. 1 J = 0.00023901 kcal. Free, instant Joule-to-Kilocalorie converter. Works both ways with a formula and reference table.
Joule to Watt-hour Converter
Convert joules to watt-hours online. 1 J = 0.00027778 Wh. Free, instant Joule-to-Watt-hour converter. Works both ways with a formula and reference table.
Joule to Kilowatt-hour Converter
Convert joules to kilowatt-hours online. 1 J = 2.777778e-7 kWh. Free, instant Joule-to-Kilowatt-hour converter. 100% in your browser, no uploads.
Kilojoule to Joule Converter
Convert kilojoules to joules online. 1 kJ = 1000 J. Free, instant Kilojoule-to-Joule converter. Works both ways with a formula and reference table.
Kilojoule to Calorie Converter
Convert kilojoules to calories online. 1 kJ = 239.005736 cal. Free, instant Kilojoule-to-Calorie converter. Works both ways with a formula and reference table.
Kilojoule to Kilocalorie Converter
Convert kilojoules to kilocalories online. 1 kJ = 0.23900574 kcal. Free, instant Kilojoule-to-Kilocalorie converter. 100% in your browser, no uploads.
Kilojoule to Watt-hour Converter
Convert kilojoules to watt-hours online. 1 kJ = 0.27777778 Wh. Free, instant Kilojoule-to-Watt-hour converter. 100% in your browser, no uploads.
Kilojoule to Kilowatt-hour Converter
Convert kilojoules to kilowatt-hours online. 1 kJ = 0.00027778 kWh. Free, instant Kilojoule-to-Kilowatt-hour converter. 100% in your browser, no uploads.
Calorie to Joule Converter
Convert calories to joules online. 1 cal = 4.184 J. Free, instant Calorie-to-Joule converter. Works both ways with a formula and reference table.
Calorie to Kilojoule Converter
Convert calories to kilojoules online. 1 cal = 0.004184 kJ. Free, instant Calorie-to-Kilojoule converter. Works both ways with a formula and reference table.
Calorie to Kilocalorie Converter
Convert calories to kilocalories online. 1 cal = 0.001 kcal. Free, instant Calorie-to-Kilocalorie converter. Works both ways with a formula and reference table.
Calorie to Watt-hour Converter
Convert calories to watt-hours online. 1 cal = 0.00116222 Wh. Free, instant Calorie-to-Watt-hour converter. Works both ways with a formula and reference table.
Calorie to Kilowatt-hour Converter
Convert calories to kilowatt-hours online. 1 cal = 1.162222e-6 kWh. Free, instant Calorie-to-Kilowatt-hour converter. 100% in your browser, no uploads.
Kilocalorie to Joule Converter
Convert kilocalories to joules online. 1 kcal = 4184 J. Free, instant Kilocalorie-to-Joule converter. Works both ways with a formula and reference table.
Kilocalorie to Kilojoule Converter
Convert kilocalories to kilojoules online. 1 kcal = 4.184 kJ. Free, instant Kilocalorie-to-Kilojoule converter. 100% in your browser, no uploads.
Kilocalorie to Calorie Converter
Convert kilocalories to calories online. 1 kcal = 1000 cal. Free, instant Kilocalorie-to-Calorie converter. Works both ways with a formula and reference table.
Kilocalorie to Watt-hour Converter
Convert kilocalories to watt-hours online. 1 kcal = 1.162222 Wh. Free, instant Kilocalorie-to-Watt-hour converter. 100% in your browser, no uploads.
Kilocalorie to Kilowatt-hour Converter
Convert kilocalories to kilowatt-hours online. 1 kcal = 0.00116222 kWh. Free, instant Kilocalorie-to-Kilowatt-hour converter.
Watt-hour to Joule Converter
Convert watt-hours to joules online. 1 Wh = 3600 J. Free, instant Watt-hour-to-Joule converter. Works both ways with a formula and reference table.
Watt-hour to Kilojoule Converter
Convert watt-hours to kilojoules online. 1 Wh = 3.6 kJ. Free, instant Watt-hour-to-Kilojoule converter. Works both ways with a formula and reference table.
Watt-hour to Calorie Converter
Convert watt-hours to calories online. 1 Wh = 860.42065 cal. Free, instant Watt-hour-to-Calorie converter. Works both ways with a formula and reference table.
Watt-hour to Kilocalorie Converter
Convert watt-hours to kilocalories online. 1 Wh = 0.86042065 kcal. Free, instant Watt-hour-to-Kilocalorie converter. 100% in your browser, no uploads.
Watt-hour to Kilowatt-hour Converter
Convert watt-hours to kilowatt-hours online. 1 Wh = 0.001 kWh. Free, instant Watt-hour-to-Kilowatt-hour converter. 100% in your browser, no uploads.
Kilowatt-hour to Joule Converter
Convert kilowatt-hours to joules online. 1 kWh = 3600000 J. Free, instant Kilowatt-hour-to-Joule converter. Works both ways with a formula and reference table.
Kilowatt-hour to Kilojoule Converter
Convert kilowatt-hours to kilojoules online. 1 kWh = 3600 kJ. Free, instant Kilowatt-hour-to-Kilojoule converter. 100% in your browser, no uploads.
Kilowatt-hour to Calorie Converter
Convert kilowatt-hours to calories online. 1 kWh = 860420.650096 cal. Free, instant Kilowatt-hour-to-Calorie converter. 100% in your browser, no uploads.
Kilowatt-hour to Kilocalorie Converter
Convert kilowatt-hours to kilocalories online. 1 kWh = 860.42065 kcal. Free, instant Kilowatt-hour-to-Kilocalorie converter.
Kilowatt-hour to Watt-hour Converter
Convert kilowatt-hours to watt-hours online. 1 kWh = 1000 Wh. Free, instant Kilowatt-hour-to-Watt-hour converter. 100% in your browser, no uploads.
Degree to Radian Converter
Convert degrees to radians online. 1 ° = 0.01745329 rad. Free, instant Degree-to-Radian converter. Works both ways with a formula and reference table.
Degree to Gradian Converter
Convert degrees to gradians online. 1 ° = 1.111111 grad. Free, instant Degree-to-Gradian converter. Works both ways with a formula and reference table.
Degree to Revolution Converter
Convert degrees to revolutions online. 1 ° = 0.00277778 rev. Free, instant Degree-to-Revolution converter. Works both ways with a formula and reference table.
Radian to Degree Converter
Convert radians to degrees online. 1 rad = 57.29578 °. Free, instant Radian-to-Degree converter. Works both ways with a formula and reference table.
Radian to Gradian Converter
Convert radians to gradians online. 1 rad = 63.661977 grad. Free, instant Radian-to-Gradian converter. Works both ways with a formula and reference table.
Radian to Revolution Converter
Convert radians to revolutions online. 1 rad = 0.15915494 rev. Free, instant Radian-to-Revolution converter. Works both ways with a formula and reference table.
Gradian to Degree Converter
Convert gradians to degrees online. 1 grad = 0.9 °. Free, instant Gradian-to-Degree converter. Works both ways with a formula and reference table.
Gradian to Radian Converter
Convert gradians to radians online. 1 grad = 0.01570796 rad. Free, instant Gradian-to-Radian converter. Works both ways with a formula and reference table.
Gradian to Revolution Converter
Convert gradians to revolutions online. 1 grad = 0.0025 rev. Free, instant Gradian-to-Revolution converter. Works both ways with a formula and reference table.
Revolution to Degree Converter
Convert revolutions to degrees online. 1 rev = 360 °. Free, instant Revolution-to-Degree converter. Works both ways with a formula and reference table.
Revolution to Radian Converter
Convert revolutions to radians online. 1 rev = 6.283185 rad. Free, instant Revolution-to-Radian converter. Works both ways with a formula and reference table.
Revolution to Gradian Converter
Convert revolutions to gradians online. 1 rev = 400 grad. Free, instant Revolution-to-Gradian converter. Works both ways with a formula and reference table.
Math Tools
Fraction Calculator
Add, subtract, multiply and divide two fractions online. Get the result as an improper fraction, a simplified fraction, a mixed number and a decimal.
Fraction Simplifier
Reduce any fraction to its lowest terms online. See the greatest common divisor used, the simplified fraction, the mixed number and the decimal value.
Decimal to Fraction Converter
Convert a decimal to a fraction online. Handles terminating and repeating decimals, and returns the exact fraction, simplified form and mixed number.
Ratio Calculator
Simplify a ratio to its lowest terms or solve a proportion A:B = C:? to find the missing value. Free online ratio calculator with clear working.
Average Calculator
Calculate the mean, median, mode, range, sum, count, minimum and maximum of a list of numbers. Free online average calculator with instant results.
Standard Deviation Calculator
Calculate population and sample standard deviation and variance from a list of numbers. Free online tool showing the mean, count and formula steps.
Prime Number Checker
Check whether a number is prime or composite. See the smallest factor and the full list of factors for any integer up to billions, instantly and privately.
Prime Factorization Calculator
Find the prime factorization of any integer. See the prime factors with exponents and the product form like 2² × 3 × 5, calculated instantly in your browser.
GCD & LCM Calculator
Find the greatest common divisor (GCD) and least common multiple (LCM) of two or more integers using Euclid's algorithm, with the working shown.
Quadratic Equation Solver
Solve any quadratic equation ax² + bx + c = 0. Get real or complex roots, the discriminant, vertex and axis of symmetry with clear step-by-step working.
Permutation & Combination Calculator
Calculate permutations (nPr) and combinations (nCr) instantly from n and r, with the factorial formulas shown. Free online nPr and nCr calculator.
Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers (1–3999). Free two-way Roman numeral converter with input validation.
Number to Words Converter
Convert numbers to words in English, including decimals, negatives and a currency mode for dollars and cents. Free online number-to-words spelling tool.
Factorial Calculator
Calculate the factorial of any number (n!) exactly using BigInt, and see the full result plus its digit count. Free online factorial calculator.
Percentage to Fraction Converter
Convert between percentages, fractions and decimals instantly, with the fraction fully simplified. Free online percent to fraction and decimal converter.
Triangle Solver
Solve any triangle from known sides and angles (SSS, SAS, ASA, AAS, SSA) using the laws of sines and cosines. Get all sides, angles, area and perimeter.
Pythagorean Theorem Calculator
Solve the Pythagorean theorem: enter any two sides of a right triangle to find the third, plus the area. Free a² + b² = c² calculator with steps.
Slope Calculator
Find the slope, midpoint, distance, line equation and angle of incline from two points. Free slope calculator that handles vertical lines too.
Number Base Converter
Convert whole numbers between any bases from 2 to 36, with from-base and to-base selectors and digit validation. Free online number base converter.
Rounding Calculator
Round any number to decimal places, significant figures or the nearest multiple, with round, floor and ceiling modes. Free online rounding calculator.
Percentage Change Calculator
Work out the percentage increase or decrease between an old and a new value. See the absolute change and whether it went up or down, instantly and privately.
Exponent Calculator
Calculate base raised to any exponent online, including negative and fractional powers. See the result and the full expression, computed instantly in your browser.
Square Root Calculator
Find the square root or any nth root of a number online. Get the decimal value and the simplified radical form where it comes out clean, all in your browser.
Logarithm Calculator
Calculate the logarithm of a number with any base, including log base 10, natural log (ln) and log base 2. See the result and an inverse check, all in your browser.
Modulo Calculator
Calculate a mod n and the quotient online, with correct handling of negative numbers. See both the truncated remainder and the floored mathematical modulo.
Arithmetic Sequence Calculator
Find the nth term and the sum of an arithmetic sequence from the first term, common difference and n. See the formula and the first several terms listed out.
Geometric Sequence Calculator
Find the nth term and sum of a geometric sequence from the first term, common ratio and n. Includes the infinite sum when the ratio is between −1 and 1.
Fibonacci Calculator
Find the nth Fibonacci number and list the sequence up to n. Uses BigInt for exact results, so even very large Fibonacci numbers stay precise in your browser.
Prime Number Generator
Generate all prime numbers up to a limit, or the first N primes, using a fast sieve. See the full list and the total count, computed instantly in your browser.
Circle Calculator
Enter any one of radius, diameter, circumference or area and calculate the other three using π. Fast, accurate circle geometry, all in your browser.
Scientific Notation Converter
Convert numbers to and from scientific notation (a × 10^b). Handles very large and very small values and shows E-notation too, all computed in your browser.
Mean, Median & Mode Calculator
Calculate the mean, median, mode, range, sum and count from a list of numbers. Handles no-mode and multi-modal data, all computed privately in your browser.
Binary Search Calculator
Visualize binary search on a sorted list. Count worst-case comparisons for any array size and trace each step — low, high, mid and decision — in your browser.
System of Equations Solver
Solve systems of 2, 3 or 4 linear equations by Gauss-Jordan elimination. See every step, and get clear answers for unique, none or infinite solutions.
Matrix Calculator
Add, subtract and multiply matrices up to 6×6, transpose them or scale by a number. Type matrices as simple rows and get instant, copyable results.
Determinant Calculator
Compute the determinant of any square matrix up to 6×6 instantly. See the full cofactor expansion for 2×2 and 3×3 matrices, worked step by step.
Matrix Inverse Calculator
Invert any square matrix up to 6×6 using Gauss-Jordan elimination on [A|I]. Detects singular matrices and verifies the result with A × A⁻¹ = I.
Cubic Equation Solver
Solve ax³ + bx² + cx + d = 0 and get all three roots, real or complex, using Cardano's method with a discriminant classification and high accuracy.
Polynomial Roots Calculator
Find every real and complex root of a polynomial from its coefficients using the Durand–Kerner method. Works for any degree from 1 to 10, instantly.
Synthetic Division Calculator
Divide a polynomial by (x − r) using synthetic division. See the classic three-row tableau, the quotient coefficients and the remainder, step by step.
Linear Equation Solver
Solve linear equations like 3x + 5 = 2x − 7 instantly. Type the equation or enter coefficients, and follow the worked steps to the value of x.
Discriminant Calculator
Compute the discriminant b² − 4ac of a quadratic equation, classify its roots as two real, one repeated or complex, and see the actual root values.
Completing the Square Calculator
Convert ax² + bx + c into vertex form a(x − h)² + k with every intermediate step shown. Get the vertex coordinates and check your algebra homework fast.
Parabola Calculator
Analyze any parabola from standard or vertex form: vertex, focus, directrix, axis of symmetry, intercepts and latus rectum — with a live graph.
Slope Intercept Form Calculator
Find the equation of a line from two points or from a slope and a point. Get y = mx + b, point-slope and standard form, plus a drawn line graph.
Online Graphing Calculator
Plot up to three y = f(x) functions on one graph. Supports sin, cos, tan, log, sqrt, powers and more, with adjustable window and PNG export.
Variance Calculator
Calculate population and sample variance from a list of numbers. See the mean, squared deviation table and standard deviation, computed in your browser.
Z Score Calculator
Convert a raw value to a z-score with z = (x − μ)/σ, or turn a z-score back into a value. Includes left, right and between probabilities from the normal curve.
Percentile Calculator
Find the value at any percentile of a data set using nearest-rank and linear-interpolation methods, or find what percentile a given value falls at.
Quartile Calculator (Q1, Q3, IQR)
Get the five-number summary of any data set: min, Q1, median, Q3 and max, plus the interquartile range and 1.5×IQR outlier fences with flagged outliers.
Weighted Average Calculator
Compute a weighted average from value and weight pairs: Σ(value × weight) ÷ Σ(weights). Add rows for grades, portfolios or ratings and see each weight's share.
Correlation Coefficient Calculator
Calculate Pearson's correlation coefficient r and r² for paired x, y data. Get a plain-English read of the strength and direction of the linear relationship.
Linear Regression Calculator
Fit y = mx + b to paired data by ordinary least squares. Get slope, intercept, r², residuals and a scatter plot with the best-fit line drawn on canvas.
Probability Calculator
Work out probabilities for one or two events: complement, union, intersection, conditional probability and the chance of at least one success in n trials.
Normal Distribution Calculator
Compute normal distribution probabilities for any mean and standard deviation: P(X<x), P(X>x), P(a<X<b), the PDF, plus an inverse quantile mode.
Binomial Distribution Calculator
Compute binomial probabilities P(X=k), P(X≤k) and P(X≥k) for n trials with success chance p, plus the distribution's mean, variance and standard deviation.
Confidence Interval Calculator
Build a confidence interval for a mean (z or t) or a proportion. Get the margin of error, lower and upper bounds, and the critical value used, step by step.
Sample Size Calculator
Find how many responses your survey or study needs: n = z²p(1−p)/e², with finite population correction, for any confidence level and margin of error.
Margin of Error Calculator
Calculate the margin of error for a survey or sample: z × √(p(1−p)/n) for proportions or z × σ/√n for means, with finite population correction.
Fraction to Decimal Converter
Convert any fraction to its exact decimal form, including repeating decimals like 1/7 = 0.(142857). See the repeating block and period instantly.
Mixed Number Calculator
Add, subtract, multiply and divide mixed numbers online. Converts to improper fractions, simplifies with the GCD, and shows the working step by step.
Proportion Calculator
Solve proportions online: enter three values of a/b = c/d and the calculator finds the missing one by cross-multiplication, or checks if two ratios are proportional.
Significant Figures Calculator
Count the significant figures in any number and round values to a chosen number of sig figs, with the counting rules explained for each answer.
Cube Root Calculator
Find the cube root of any number, including negatives, detect perfect cubes, and compute any nth root online with instant, private results.
Factors Calculator
List every factor of a number with factor pairs, count and sum. Flags primes and perfect, abundant or deficient numbers instantly in your browser.
Long Division Calculator
Do long division with every step shown: the classic bring-down layout, partial products, remainder and optional decimal places, rendered instantly.
Big Number Calculator
Add, subtract, multiply, divide and raise huge integers to powers with exact arbitrary-precision arithmetic — hundreds or thousands of digits, no rounding.
Trigonometry Calculator
Evaluate sin, cos, tan, csc, sec and cot in degrees or radians, with exact special-angle values, reference angles, quadrants and all six inverse functions.
Unit Circle Calculator
See any angle drawn on the unit circle with its (cos θ, sin θ) point, radians in π form, quadrant and reference angle — updated live as you type.
Vector Calculator
Add, subtract and scale 2D or 3D vectors, compute dot and cross products, magnitudes, unit vectors and the angle between vectors instantly online.
Complex Number Calculator
Add, subtract, multiply, divide and raise complex numbers to powers. Converts between rectangular a+bi and polar form with modulus, argument and conjugate.
Truth Table Generator
Generate the complete truth table for any boolean expression with AND, OR, NOT, XOR, implies and iff — up to 6 variables, with tautology detection.
Eigenvalue and Eigenvector Calculator
Find eigenvalues and eigenvectors of 2×2 and 3×3 matrices from the characteristic polynomial, with algebraic and geometric multiplicity spelled out.
Characteristic Polynomial Calculator
Compute det(λI − A) for matrices up to 6×6 with the Faddeev-LeVerrier recursion, plus trace and determinant cross-checks and a Cayley-Hamilton proof.
RREF Calculator
Reduce any matrix to reduced row echelon form with every row operation listed, pivot columns marked, and the rank and consistency of the system reported.
Matrix Rank Calculator
Find the rank of any matrix by exact row reduction, then get the nullity from the rank-nullity theorem plus full row rank, column rank and singularity.
Null Space (Kernel) Calculator
Solve A·x = 0 to get a basis for the null space, its dimension, and the general solution in parametric vector form — all in exact fractions.
Linear Independence Calculator
Test whether a set of vectors is linearly independent by comparing rank to vector count, and see the explicit relation when they turn out to be dependent.
LU Decomposition Calculator
Factor a square matrix into P, L and U by Doolittle elimination with partial pivoting, then use the factorisation to get the determinant and solve A·x = b.
QR Decomposition Calculator
Factor a matrix into an orthogonal Q and upper-triangular R using Householder reflections, with an orthogonality check and least-squares solving.
Gram-Schmidt Calculator
Turn any set of vectors into an orthogonal or orthonormal basis with the modified Gram-Schmidt process, showing every projection subtraction as a step.
Cramer's Rule Calculator
Solve linear systems with Cramer's rule as a ratio of determinants, seeing each replaced matrix, its cofactor expansion and the exact fractional answer.
Matrix Power Calculator
Raise a square matrix to any whole power using binary exponentiation, with the intermediate squarings shown and negative powers via the exact inverse.
Adjugate Matrix Calculator
Build the cofactor matrix from minors, transpose it into the adjugate, and see both A·adj(A) = det(A)·I and A⁻¹ = adj(A)/det(A) verified entry by entry.
Vector Projection Calculator
Project one vector onto another to get the vector projection, scalar projection, orthogonal rejection and the angle between, for 2D or 3D vectors.
P-Value Calculator
Turn a z, t, chi-square or F test statistic into left-tail, right-tail and two-tailed p-values, with the critical value and a reject or fail-to-reject verdict.
T-Test Calculator
Run a one-sample, paired or two-sample t-test from raw data. Get t, degrees of freedom, exact p-values, the critical value, Cohen's d and a confidence interval.
Chi-Square Test Calculator
Run a chi-square goodness-of-fit test or a test of independence on a contingency table. Get the statistic, degrees of freedom, exact p-value and Cramér's V.
One-Way ANOVA Calculator
Build a complete one-way ANOVA table from pasted groups: sums of squares, degrees of freedom, mean squares, the F statistic, an exact p-value and eta squared.
Poisson Distribution Calculator
Calculate Poisson probabilities for a given rate: P(X = k), cumulative tails, range probabilities, mean and variance, with a bar chart and full probability table.
Geometric Distribution Calculator
Work out geometric probabilities using either convention: trials until the first success or failures before it. Includes CDF, mean, variance and a bar chart.
Hypergeometric Distribution Calculator
Calculate probabilities for sampling without replacement: P(X = k), cumulative tails, mean and variance with the finite population correction, plus a chart.
Exponential Distribution Calculator
Calculate exponential distribution probabilities from a rate or a mean: PDF, CDF, survival, interval probability, median, variance and the inverse quantile.
Bayes' Theorem Calculator
Apply Bayes' theorem to get a posterior probability, or switch to diagnostic-test mode for positive and negative predictive value with an expanded 2 × 2 table.
Expected Value Calculator
Calculate the expected value, variance and standard deviation of a discrete random variable, or switch to wager mode for the EV per unit staked and the house edge.
Covariance Calculator
Calculate sample and population covariance from paired data, with the full deviation-product table, both means and Pearson's correlation coefficient alongside.
Dice Probability Calculator
Get exact probabilities for the sum of any number of dice with any number of sides, plus 'at least one' odds, a histogram and the full ways-to-roll table.
Frequency Distribution Calculator
Group raw data into classes using Sturges' rule, the square-root rule or a width you choose, then get frequencies, cumulative columns, grouped stats and a histogram.
Finance Calculators
Compound Interest Calculator
Calculate compound interest with optional monthly contributions. See final balance, total interest and a year-by-year growth table for any rate and term.
Simple Interest Calculator
Calculate simple interest with the I = P × r × t formula. Enter principal, annual rate and time to see the interest and total amount instantly.
Loan Calculator
Calculate your monthly loan payment, total interest and total cost. Includes a full amortization schedule for any loan amount, rate and term.
Mortgage Calculator
Estimate your monthly mortgage payment including principal, interest, property tax and insurance. See total interest over the life of the home loan.
Tip Calculator
Calculate the tip and total for any bill, then split it evenly between people. Quick 15%, 18% and 20% buttons for fast gratuity at restaurants.
Margin & Markup Calculator
Calculate profit margin, markup and profit from cost and selling price, or find the price for a target margin. Ideal for pricing products and quotes.
Break-Even Calculator
Find your break-even point in units and revenue from fixed costs, price per unit and variable cost. Essential for pricing and small-business planning.
ROI Calculator
Calculate return on investment, net profit and annualized ROI from the amount invested and returned. Compare investments over any holding period.
Sales Tax Calculator
Add sales tax to a net price or extract tax from a gross price at any rate. See the net, tax and gross amounts instantly for receipts and invoices.
Salary to Hourly Calculator
Convert an annual salary to an hourly wage or an hourly rate back to a yearly salary, with monthly, weekly and daily pay equivalents. Free and private.
Savings Goal Calculator
Work out how much to save each month to reach a target amount by a set date, including interest earned. Free savings goal calculator, 100% in-browser.
Debt Payoff Calculator
Plan how fast you can clear multiple debts using the snowball or avalanche method. See payoff time, total interest and payment order. Free and private.
CAGR Calculator
Calculate the compound annual growth rate (CAGR) from a beginning value, ending value and number of years. See the formula and total growth. Free tool.
Inflation Calculator
See how inflation erodes purchasing power over time, or what a past amount is worth today. Enter an amount, rate and years. Free, private inflation tool.
Invoice Generator
Create a professional invoice with line items, tax and totals, then export a clean PDF — all in your browser. Free invoice generator, nothing uploaded.
Fuel Cost Calculator
Estimate the fuel cost and amount of fuel for any trip using distance, efficiency and fuel price. Supports miles/km and MPG or L/100km. Free and private.
Freelance Rate Calculator
Calculate the hourly and day rate you need to charge as a freelancer from your target income, expenses and billable hours. Free, private and instant.
Down Payment Calculator
Work out your down payment, loan amount and remaining percent from a home or purchase price. Switch between a down-payment percent and a fixed amount.
Rent vs Buy Calculator
Compare the cumulative cost of renting versus buying a home over several years, with rent growth, mortgage payments and ownership costs, and a clear verdict.
Net Worth Calculator
Add up your assets and subtract your liabilities to find your net worth. Editable rows for cash, property, investments, loans and debts, totalled instantly.
Retirement Savings Calculator
Project your retirement savings from current balance, monthly contributions, annual return and years. See the future value split into contributions and growth.
Paycheck Calculator
Estimate take-home pay from gross salary using your own tax and deduction percentages. See net pay per week, two weeks and month with a clear breakdown.
Overtime Pay Calculator
Calculate total pay from regular hours and overtime hours at a set multiplier (default 1.5×). See regular pay, overtime pay and total gross earnings.
Commission Calculator
Calculate sales commission from an amount and a rate, flat or tiered, plus an optional base salary. See commission earned and total earnings instantly.
Markup Calculator
Calculate selling price and profit from a cost and markup percentage, and see the resulting profit margin. Ideal for pricing products, quotes and resale.
Gross Profit Calculator
Calculate gross profit and gross profit margin from revenue and cost of goods sold. See profit in currency and as a percentage for pricing and reporting.
Lease Calculator
Estimate a monthly lease payment from capitalized cost, residual value, term and money factor. See the depreciation and finance portions of each payment.
Future Value Calculator
Calculate the future value of a lump sum and regular contributions given a rate and number of periods. See the total and the interest earned over time.
Present Value Calculator
Calculate the present value of a future lump sum and future payments using a discount rate and number of periods. See today's worth of tomorrow's money.
Amortization Schedule Calculator
Build a full month-by-month amortization schedule from your loan amount, rate and term. See principal, interest and balance for every payment, with CSV export.
Car Loan Calculator
Work out your monthly car payment from vehicle price, trade-in, down payment, sales tax and dealer fees, with total interest and the full cost of the loan.
Student Loan Calculator
Calculate monthly payments, payoff date and lifetime interest across one or several student loans, including interest that capitalizes during a grace period.
Credit Card Payoff Calculator
See how long it takes to clear a credit card balance and what the interest costs, comparing a fixed monthly payment against the minimum-payment trap.
APR Calculator
Find the true annual percentage rate on a loan once points, origination fees and closing costs are included, and compare it with the quoted nominal rate.
Mortgage Refinance Calculator
Compare your current mortgage with a refinance offer: new payment, monthly saving, lifetime saving and the break-even month where savings cover closing costs.
Early Mortgage Payoff Calculator
See how extra monthly, annual or one-off payments shorten your mortgage. Compare the accelerated schedule with the baseline to find the time and interest saved.
Home Affordability Calculator
Find out how much house you can afford from your income, monthly debts and down payment, using the 28/36 debt-to-income rule with fully editable ratios.
Debt-to-Income Ratio Calculator
Calculate your front-end and back-end debt-to-income ratios from itemised monthly debts and gross income, with the lender thresholds each result falls into.
Loan to Value (LTV) Calculator
Calculate your loan-to-value ratio, combined LTV with a second lien, your equity percentage and how far you are from the 80% mark where PMI usually drops.
Balloon Payment Calculator
Calculate the regular payment and the lump sum due at maturity on a balloon loan amortized over a longer notional term, plus total interest paid.
Loan Interest Rate Calculator
Work out the interest rate on a loan from the amount borrowed, the monthly payment and the term. Solves the annuity equation numerically for the true rate.
Loan Comparison Calculator
Compare up to three loan offers side by side on payment, total interest, fees and effective APR, with the cheapest total cost ranked automatically.
401(k) Calculator
Project your 401(k) balance at retirement from your salary, contribution percent, employer match and expected return, with a year-by-year growth table.
Roth IRA Calculator
Compound your annual Roth IRA contributions to retirement and compare the tax-free balance against a traditional account taxed at withdrawal.
SIP Calculator
Calculate the maturity value of a monthly SIP from your instalment, expected return and duration, with the invested-versus-returns split and a yearly table.
Dividend Calculator
Work out annual dividend income, dividend yield and yield on cost, then project reinvested DRIP growth from a dividend growth rate you set yourself.
Annuity Calculator
Calculate the present value, future value or sustainable payout of an annuity, for both ordinary annuities and annuities due, at any rate and term.
Bond Yield Calculator
Calculate a bond's current yield, yield to maturity and yield to call from its face value, coupon rate, market price and time remaining.
Capital Gains Tax Calculator
Calculate capital gain, tax due and net proceeds from your sale price, cost basis, fees and a tax rate you enter yourself. No jurisdiction tables.
Rule of 72 Calculator
See how long it takes an investment to double using the Rule of 72, checked against the exact logarithmic answer so you can see the approximation error.
Emergency Fund Calculator
Work out your emergency fund target from itemised essential monthly expenses and months of coverage, plus how long it takes to reach at your savings rate.
NPV Calculator
Discount a full series of period cash flows to today's money at any rate, with a cumulative discounted cash flow table, profitability index and CSV export.
IRR Calculator
Find the internal rate of return of a cash flow series by numeric root-finding, with an NPV check, a discount curve and clear warnings when no IRR exists.
Stock Average Calculator
Calculate your weighted average cost per share across multiple buy lots, the break-even price after brokerage, and profit or loss at any price you enter.
Crypto Profit Calculator
Calculate crypto profit, loss and ROI from buy price, sell price, quantity and both-side fee percentages, with break-even and target price planning.
Biweekly Mortgage Calculator
Compare a biweekly mortgage against monthly payments to see how many years you cut off the term and how much interest you save, plus a year-by-year table.
Mortgage Points Calculator
Work out what discount points cost, how much they cut your monthly payment, and the break-even month — so you know whether buying down your rate is worth it.
PMI Calculator
Estimate monthly private mortgage insurance, find the month your balance crosses 80% and 78% loan-to-value, and total the PMI you pay before it drops off.
PITI Calculator
Add principal, interest, taxes, insurance, HOA and PMI into one monthly PITI figure, then check it against front-end and back-end debt-to-income limits.
Interest-Only Mortgage Calculator
Model an interest-only mortgage: the low early payment, the jump when it converts to full repayment, and the extra interest it costs over the loan's life.
ARM Calculator
Project an adjustable-rate mortgage through its caps: a fixed teaser period, then index plus margin, re-amortised at each adjustment in three scenarios.
HELOC Payment Calculator
Calculate a home equity line of credit: available credit from your CLTV, interest-only draw payments on a schedule of draws, and the amortising repayment phase.
Closing Cost Calculator
Build an itemised closing cost estimate: origination, prepaid interest, escrow months and your own fee lines, totalled into the cash you need at closing.
Rent Affordability Calculator
Work out how much rent you can afford using the 30% rule, the landlord 3× income test and a debt-adjusted view, plus the income a target rent needs.
Debt Consolidation Calculator
Compare keeping your debts separate against one consolidation loan: payoff times, blended APR, total interest and whether the fee and longer term are worth it.
Balance Transfer Calculator
Model a 0% balance transfer: the transfer fee, the payment needed to clear before the promo ends, what the revert APR costs, and the saving versus staying put.
Car Depreciation Calculator
Project a car's resale value year by year with declining-balance depreciation, separate first-year and later rates, and the cost per year and per mile driven.
Car Lease vs Buy Calculator
Compare leasing a car against buying over the same horizon: lease payment from the money factor, loan payment, mileage overage and net cost after equity.
Stock Profit Calculator
Work out net profit on a share trade after commissions, with return percentage, break-even sell price and annualised return across multiple buy lots.
Stock Split Calculator
Convert a holding through forward or reverse stock splits: new share count, adjusted cost basis per share, split-adjusted price and cash in lieu of fractions.
Dollar Cost Averaging Calculator
Simulate fixed periodic investments over your own price series or a modelled return, and compare the average cost and ending value against a single lump sum.
Expense Ratio Calculator
See what a fund's expense ratio costs over time: fees paid each year, the lost compound growth, the ending-value gap and a side-by-side cheaper fund.
Portfolio Rebalancing Calculator
Turn current holding values and target weights into a trade plan: drift per asset, the exact buy or sell amount, and a cash-only mode that never sells.
CD Calculator
Work out what a certificate of deposit pays at maturity, its true APY at any compounding frequency, and what an early withdrawal penalty would cost you.
APY Calculator
Convert between nominal APR and effective APY at any compounding frequency, and see the same rate tabulated daily, monthly, quarterly and continuously.
Cap Rate Calculator
Calculate capitalisation rate from net operating income and price, or solve the price from a target cap rate, with GRM and the 1% rule screening check.
Rental Property Cash Flow Calculator
Model monthly rental cash flow after mortgage, tax, insurance and reserves, with cash-on-cash return, DSCR, cap rate and the break-even rent.
Savings Withdrawal Calculator
Find out how long your savings will last at a given monthly withdrawal, or how much you can safely take for a set number of years, with inflation increases.
Financial Independence Calculator
Work out your FI number from annual spending and a safe withdrawal rate, the years until you reach it, and the coast-FI amount needed today to stop saving.
Options Profit Calculator
Build a multi-leg option strategy and see the expiry payoff chart, break-even prices, maximum profit and maximum loss for calls, puts, spreads and straddles.
Income Tax Bracket Calculator
Apply a fully editable progressive bracket table to your income and see tax per band, total tax, marginal rate, effective rate and take-home pay.
WACC Calculator
Calculate weighted average cost of capital from market-value weights, CAPM cost of equity and a blended after-tax cost of debt, with Hamada beta relevering.
Depreciation Calculator
Build a year-by-year depreciation schedule using straight line, declining balance, double declining, sum of years digits, units of production or MACRS.
Bond Duration Calculator
Price a bond and calculate Macaulay duration, modified duration, convexity and DV01, then estimate the price move for any yield shift in basis points.
Sharpe Ratio Calculator
Paste a return series to get the Sharpe ratio with mean and standard deviation, plus Sortino, Treynor, information ratio and tracking error, annualised.
RMD Calculator
Work out your required minimum distribution from the IRS Uniform Lifetime Table, aggregate several accounts, and project future RMDs with a growth rate.
Self-Employment Tax Calculator
Estimate self-employment tax on your net profit with editable Social Security and Medicare rates, wage base, surtax threshold and the deductible half.
Estimated Tax Payment Calculator
Size your quarterly estimated tax payments from the safe-harbour rules, split them four ways or use the annualised income method for uneven earnings.
50/30/20 Budget Calculator
Split your take-home pay into needs, wants and savings at any ratio, map real spending to each bucket and see surplus, overspend and your true savings rate.
Credit Utilization Calculator
Calculate per-card and aggregate credit utilisation, and see exactly what payment or credit-limit increase brings each card down to your target ratio.
Stamp Duty Calculator
Calculate progressive stamp duty from a fully editable band table, with region presets, first-time-buyer relief, surcharges and total purchase cost.
Mortgage Recast Calculator
See what a lump-sum principal payment does to your mortgage: the recast payment over the remaining term versus keeping the payment and shortening the loan.
Gratuity Calculator
Calculate end-of-service gratuity under the Indian 15/26 rule, the UAE 21/30-day rule or your own company policy, with editable caps and rounding.
Color & CSS Tools
Color Picker
Pick any color and get its HEX, RGB and HSL values instantly. Free online color picker with shades, tints and one-click copy for designers and developers.
Color Palette Generator
Generate complementary, analogous, triadic, tetradic and monochromatic color palettes from any base color. Click any swatch to copy its HEX code fast.
Gradient Generator
Create beautiful linear, radial and conic gradients with up to 4 color stops, position sliders and an angle control. Live preview and copyable CSS code.
CSS Gradient Generator
Build production-ready CSS gradients with a fallback color, preset gallery and live preview. Copy clean background-image code straight into your site.
HEX to RGB Converter
Convert HEX color codes to RGB and RGBA instantly. Supports 3, 6 and 8-digit HEX with a live color swatch, batch list conversion and one-click copy.
RGB to HEX Converter
Convert RGB or RGBA values to HEX color codes instantly. Enter channels manually or paste an rgb() string, preview the swatch and copy the HEX result.
HEX to HSL Converter
Convert HEX color codes to HSL and HSLA instantly. See hue, saturation and lightness values with a live swatch, batch list conversion and copy button.
HSL to HEX Converter
Convert HSL values to HEX and RGB with live hue, saturation and lightness sliders. Watch the color swatch update in real time and copy the color codes.
Contrast Checker
Check the contrast ratio between text and background colors against WCAG AA and AAA standards. Live preview, pass/fail badges and a one-click color swap.
Random Color Generator
Generate a random color palette in one click. Lock the swatches you like, re-roll the rest, and copy the result as a HEX list or ready CSS variables.
CSS Border Radius Generator
Design rounded corners visually with per-corner sliders and a live preview box. Copy modern border-radius CSS, including fancy 8-value organic blob shapes.
CSS Box Shadow Generator
Make CSS box shadows online with offset, blur, spread, color and opacity controls. Stack multiple shadow layers, preview live and copy the box-shadow code.
CSS Clip Path Generator
Online clip-path generator and editor: triangles, arrows, hexagons, circles, ellipses and custom polygons with point sliders. Live preview and copy-ready CSS.
Color Mixer
Mix two colors together with an adjustable ratio slider and get the blended HEX and RGB instantly. Free online color blender with a live swatch preview.
Tints and Shades Generator
Generate a strip of tints and shades from any base color. Ten lighter and ten darker steps with HEX codes and one-click copy for hover states and scales.
Complementary Color Calculator
Find the complementary (opposite) color of any HEX code instantly. Rotates the hue by 180° and shows both swatches with copyable HEX and RGB values.
Analogous Color Generator
Generate an analogous color scheme from any base color. Colors at ±30° and ±60° on the wheel with copyable HEX codes and live swatches for calm palettes.
Triadic Color Generator
Generate a triadic color scheme from any base color. Three hues evenly spaced 120° apart on the wheel with copyable HEX codes and live swatch previews.
Monochromatic Color Generator
Generate monochromatic color variations from one base color by varying lightness and saturation. Copyable HEX swatches for clean, harmonious single-hue palettes.
Color Blindness Simulator
Simulate how colors look with protanopia, deuteranopia, tritanopia and achromatopsia. Compare original and color-blind versions of any HEX to test accessibility.
HEX to CMYK Converter
Convert HEX color codes to CMYK percentages for print. Enter any HEX and get cyan, magenta, yellow and key (black) values with a live swatch and copy button.
CMYK to HEX Converter
Convert CMYK print values to HEX and RGB for the web. Enter cyan, magenta, yellow and key percentages and get a copyable HEX code with a live swatch.
RGB to HSL Converter
Convert RGB values to HSL instantly. Enter red, green and blue channels and get hue, saturation and lightness with a live swatch and copyable hsl() output.
HSL to RGB Converter
Convert HSL values to RGB with live hue, saturation and lightness sliders. See the color swatch update in real time and copy the rgb() and HEX output.
RGB to CMYK Converter
Convert RGB values to CMYK percentages for print. Enter red, green and blue and get cyan, magenta, yellow and key values with a live swatch and copy button.
Color Name Finder
Find the nearest CSS named color for any HEX or RGB value. Shows the color name, its swatch and how close the match is, using all 140+ CSS color keywords.
RGBA Color Generator
Pick a color and adjust its alpha to generate rgba() and 8-digit HEX values. Live checkerboard preview shows true transparency, with one-click copy of both.
CSS Flexbox Generator
Build flexbox layouts visually with controls for direction, justify-content, align-items, wrap and gap. Live preview of the boxes and copy-ready CSS.
CSS Grid Generator
Design CSS grid layouts visually with column and row counts, gap control and a live grid preview. Copy clean grid-template CSS ready for your stylesheet.
CSS Text Shadow Generator
Free CSS text shadow generator to build text-shadow effects with x/y offset, blur and color. Add a second layer for glow, neon or 3D, then copy the CSS.
CSS Transform Generator
Generate CSS transforms with sliders for translate, rotate, scale and skew. See a live preview of the transformed box and copy the transform code.
CSS Transition Generator
Build CSS transitions with property, duration, timing-function and delay controls. Hover the live preview to see the effect and copy the transition code.
CSS Animation Generator
Generate CSS keyframe animations from presets like fade, slide, bounce, spin and pulse. Set duration, timing and iteration and copy the @keyframes code.
CSS Glassmorphism Generator
Create frosted-glass CSS cards with blur, transparency, color, border and radius controls. Live preview over a gradient and copy-ready backdrop-filter code.
CSS Button Generator
Design CSS buttons with background, text color, padding, radius, font size, border, shadow and a hover color. Live preview and copy-ready CSS including :hover.
CSS Filter Generator
Apply CSS filters with sliders for blur, brightness, contrast, grayscale, sepia, hue-rotate, saturate and invert. Live preview on a sample and copy the code.
CSS Triangle Generator
Generate pure-CSS triangles using the classic border trick. Choose direction, size and color, preview live, and copy the ready-to-use triangle CSS.
CSS Loader Generator
Generate pure-CSS loading spinners: ring, dots and bars. Control size, color and speed, preview the animation live, and copy the CSS including keyframes.
CSS Tooltip Generator
Build pure-CSS hover tooltips with position, background, text color, radius and custom text. Live hover preview and copy-ready tooltip CSS with an arrow.
CSS Outline Generator
Generate CSS outlines with width, style, color and outline-offset controls. Live preview of the outlined box and copy-ready outline code for focus states.
CSS Blend Mode Generator
Preview every CSS mix-blend-mode and background-blend-mode over two gradient layers. Pick a mode from the dropdown and copy the blend-mode CSS instantly.
CSS Border Generator
Free CSS border generator with per-side width, style and color controls plus a border-image maker for gradients or images. Live preview and copy-ready CSS.
OKLCH Color Converter
Convert HEX and RGB to OKLCH or OKLab and back, with a live swatch, gamut warnings and ready-to-paste oklch() CSS for Tailwind v4.
CSS Color Format Converter
Turn one colour into every modern CSS syntax at once: hex, rgb, hsl, hwb, lab, lch, oklab, oklch and display-p3, each with its own copy button.
RGB to LAB Color Converter
Convert sRGB or HEX to CIELAB and back through CIE XYZ at the D65 white point, with every intermediate step shown and out-of-gamut warnings.
RGB to HSV/HSB Converter
Convert HEX or RGB to HSV (the HSB model in Photoshop and Figma) and back, with the HSL equivalent shown beside it so you can see why they disagree.
Delta E Color Difference Calculator
Measure how different two colours look with CIE76, CIE94 and CIEDE2000, and read the result against the just-noticeable-difference scale used in print QC.
APCA Contrast Checker
Calculate the APCA lightness contrast (Lc) for any text and background pair, with the draft WCAG 3 font size and weight lookup and a live preview.
Accessible Color Finder
Find the nearest colour that passes WCAG contrast by adjusting only OKLCH lightness, so your brand hue survives while the text becomes readable.
Color Contrast Grid
Paste a palette and get every foreground-on-background contrast ratio in one matrix, colour-coded by WCAG pass level and exportable as CSV or Markdown.
Colorblind Safe Palette Generator
Generate a categorical palette that stays distinguishable under protanopia, deuteranopia and tritanopia, verified with CIEDE2000 on every simulated pair.
Tailwind Color Scale Generator
Turn one brand colour into a full 50-950 Tailwind scale in OKLCH, with contrast against white and black for every step and copy-ready @theme output.
Dark Mode Palette Generator
Map a light-theme palette to its dark counterpart by inverting OKLCH lightness within bounds you set, then re-check every pairing for 4.5:1 contrast.
Split Complementary Color Generator
Build a split-complementary scheme from any base colour, with an adjustable split angle, tint and shade ramps, and copy-ready HEX, RGB and HSL values.
Tetradic Color Scheme Generator
Generate four-colour rectangle or square harmonies from one base colour, balance them so one dominates, and preview the result on a mock UI card.
Cubic Bezier Generator
Drag two control points to build a cubic-bezier() easing curve, preview it on a moving dot, and copy the CSS timing function straight into your stylesheet.
CSS Neumorphism Generator
Build soft UI neumorphism CSS from one surface colour: two mirrored box-shadow layers with raised, pressed, concave and convex modes plus a contrast warning.
CSS Scrollbar Generator
Style scrollbars with both syntaxes at once: scrollbar-width and scrollbar-color for Firefox, plus the ::-webkit-scrollbar block for Chrome, Edge and Safari.
CSS Background Pattern Generator
Make stripes, checkerboards, polka dots, grid paper, hatching, zigzags and carbon fibre from pure CSS gradients — no image files and no extra HTTP requests.
Gradient Text Generator
Create gradient text in CSS with background-clip, an animated shimmer option, a solid-colour fallback and a live contrast check on light or dark backgrounds.
SVG Shape Divider Generator
Generate wave, tilt, curve, triangle, book, arrow and split section dividers as parametric SVG, ready as inline markup or a CSS data-URI background image.
Type Scale Generator
Build a modular type scale from a base size and ratio, with line heights snapped to a baseline grid, exported as CSS variables, Sass, Tailwind config or JSON.
CSS Clamp Calculator
Turn a minimum and maximum size plus two viewport widths into a fluid CSS clamp() value, with the slope, intercept and computed size at seven screen widths.
Hex to CSS Filter Converter
Find the CSS filter chain that turns a black element into any hex colour, with the residual delta E reported so you can see exactly how close the match got.
Colour Temperature to RGB Converter
Convert a colour temperature in kelvin to sRGB and hex using the Tanner Helland blackbody fit, with reference points from candlelight to clear polar sky.
Wavelength to Colour Converter
Convert a light wavelength in nanometres to approximate sRGB and hex using Bruton's ramp, alongside exact photon energy in eV and frequency in terahertz.
CSS Toggle Switch Generator
Generate an accessible CSS toggle switch built on a real checkbox, with focus-visible ring, disabled state, reduced-motion support and copyable HTML and CSS.
GIS & Map Tools
Coordinate Converter
Convert GPS coordinates between decimal degrees, degrees-minutes-seconds and decimal minutes instantly. Paste any format like 40°26'46"N and copy the result.
Distance Calculator
Calculate the straight-line distance and bearing between two points on a map by latitude/longitude using the Haversine formula — km, miles and nautical miles.
Latitude Longitude Finder
Look up latitude and longitude on a map: paste coordinates in any format to validate and normalize them, then open the point in Google Maps or OpenStreetMap.
GeoJSON to KML Converter
Convert GeoJSON or JSON to KML for Google Earth, free in your browser. Points, lines, polygons, multi-geometries and feature properties supported. No upload.
GPX to KML Converter
Convert GPX files from your GPS device to KML for Google Earth. Waypoints, tracks and routes preserved with names and elevation — free and private.
KML to GeoJSON Converter
Convert KML files to GeoJSON FeatureCollections in your browser. Placemarks, folders, polygons with holes and MultiGeometry supported. Free, no upload.
KML Circle Generator
Generate a KML circle around any latitude/longitude with a custom radius in meters, kilometers or miles, then download the circle KML for Google Earth or Maps.
KML Polygon Generator
Create a KML polygon from latitude/longitude vertices with custom fill and line colors, then download the KML file for Google Earth or Google Maps.
Square Footage Calculator
Calculate square footage and land area from rectangle dimensions or map coordinates (X,Y or lat/long). Get square feet, meters, yards, acres and hectares.
Bearing Calculator
Calculate the initial and final bearing between two latitude/longitude points, with compass direction, quadrant bearing and great-circle distance.
Midpoint Calculator
Find the great-circle midpoint between two latitude/longitude points, or any waypoint along the route, in decimal degrees, DMS and DDM.
DMS to Decimal Converter
Convert degrees, minutes and seconds to decimal degrees. Enter D/M/S with a hemisphere, or bulk-paste many DMS coordinates and convert them all at once.
Decimal to DMS Converter
Convert decimal degrees to degrees, minutes and seconds. Choose the seconds precision, see the component breakdown and bulk-convert a whole list.
Geohash Encoder
Convert latitude and longitude to a geohash at any precision from 1 to 12 characters, with the ground size of each cell shown alongside.
Geohash Decoder
Decode any geohash to its centre latitude and longitude plus the exact bounding box, cell size, uncertainty and a downloadable GeoJSON polygon.
UTM Coordinate Converter
Convert latitude and longitude to UTM zone, easting and northing on WGS-84 — and convert UTM grid references back to lat/long. Free and offline.
WKT to GeoJSON Converter
Convert WKT geometry to GeoJSON in your browser. Supports all seven geometry types, Z and M dimensions, EMPTY geometries and EWKT SRID prefixes.
GeoJSON to WKT Converter
Convert GeoJSON to Well-Known Text for PostGIS, Oracle Spatial or SQL Server. Control coordinate precision and merge features into a GEOMETRYCOLLECTION.
GeoJSON Validator
Validate GeoJSON against RFC 7946 and get the exact JSON path of every problem: unclosed rings, swapped coordinates, missing properties and more.
Bounding Box Calculator
Calculate the bounding box of a list of coordinates or a GeoJSON file. Get the bbox array, Leaflet bounds, WKT envelope and a downloadable polygon.
CSV to KML Converter
Convert a CSV of latitude and longitude columns into KML placemarks for Google Earth or My Maps. Pick your columns, add names and descriptions, download.
Polyline Encoder & Decoder
Encode coordinates into a Google encoded polyline string, or decode one back to latitude/longitude — precision 5 and 6, with GeoJSON output.
MGRS Coordinate Converter
Convert latitude and longitude to an MGRS grid reference and back, at 1 m to 100 km precision, with the UTM zone, band and 100 km square shown.
Web Mercator Converter (EPSG:4326 ↔ 3857)
Convert WGS84 latitude and longitude to Web Mercator metres and back, with the scale and area distortion at that latitude worked out for you.
Slippy Map Tile Calculator
Work out the XYZ tile for any coordinate and zoom, or the bounding box of a tile, with the Bing quadkey, pixel offset and metres per pixel.
Geohash Converter
Encode coordinates to a geohash at any precision, decode a geohash to its centre and bounding box, and list all eight neighbouring cells.
Route Distance Calculator
Add up the great-circle distance across a list of waypoints, with a per-leg table of distances and bearings in kilometres, miles and nautical miles.
Destination Point from Bearing and Distance
Find the coordinates you reach from a start point on a given bearing and distance, in decimal degrees and DMS, with a downloadable KML placemark.
GPX Track Analyzer
Analyse a GPX file for distance, elevation gain and loss, moving versus elapsed time, speed and pace, with an elevation profile drawn in your browser.
GPX to CSV Converter
Convert GPX waypoints, routes and track points into a CSV with latitude, longitude, elevation, time, and optional distance and speed columns.
GPX to GeoJSON Converter
Convert a GPX file into a GeoJSON FeatureCollection with waypoints as Points, tracks and routes as LineStrings, keeping names, times and elevation.
CSV to GeoJSON Converter
Turn a CSV of coordinates into a GeoJSON FeatureCollection, picking the latitude and longitude columns and keeping every other column as a property.
GeoJSON to CSV Converter
Flatten a GeoJSON FeatureCollection into a CSV table with one row per feature, a centroid for lines and polygons, and every property as a column.
GeoJSON Simplifier
Shrink GeoJSON with the Ramer-Douglas-Peucker algorithm at a tolerance in metres, and see the before-and-after outline and the file size saving.
Plus Code Converter
Convert latitude and longitude to a Plus Code and back, at 2 to 15 digits, with the code area's centre, bounding box and size in metres.
OS Grid Reference Converter
Convert WGS-84 latitude and longitude to a British National Grid reference and back, from 2 to 10 figures, with the OSGB36 position shown.
Maidenhead Grid Locator Converter
Convert latitude and longitude to a Maidenhead QTH locator and back, plus great-circle distance and beam heading between any two grid squares.
Point in Polygon Checker
Test one or many coordinates against a GeoJSON, KML or WKT polygon with the ray-casting rule, reporting inside, outside or on the boundary.
Distance Matrix Calculator
Build a full N by N distance table from a list of coordinates, with haversine or Vincenty accuracy, in km, miles, nautical miles or metres.
Geodesic Polygon Area Calculator
Measure the true area of a polygon on the globe from GeoJSON, KML, WKT or coordinates, in square metres, hectares, km2, acres and square feet.
Great Circle Path Generator
Sample the great circle between two coordinates into waypoints and export it as a GeoJSON LineString, KML or CSV, split at the antimeridian.
Rhumb Line Calculator
Work out the constant compass course and distance between two coordinates, the rhumb midpoint, and how much longer it is than the great circle.
Cross Track Distance Calculator
Find how far a point lies off a planned great-circle leg, the along-track distance, the closest point on course and whether you overshot.
GeoJSON to GPX Converter
Convert a GeoJSON FeatureCollection into valid GPX 1.1: Points become waypoints, LineStrings become tracks, and elevations are preserved.
ECEF Coordinate Converter
Convert geodetic latitude, longitude and height to WGS-84 ECEF XYZ and back with Bowring's method, plus local east/north/up from a reference station.
WKB to WKT Converter
Decode hex-encoded WKB or PostGIS EWKB into readable WKT and GeoJSON, with the SRID, dimensionality, byte order and vertex count explained.
Date & Time Tools
Date Difference Calculator
Calculate the exact difference between two dates in years, months and days, plus total days, weeks, hours and minutes. Free, fast and private.
Countdown Timer
Free online countdown timer. Count down to any date and time or start a quick timer in minutes, with start, pause, reset and a live progress bar.
Time Zone Converter
Convert any date and time between world time zones. See UTC offsets, daylight saving handled automatically, and compare multiple zones at once.
Timestamp Converter
Convert timestamps to human-readable dates and dates back to timestamps. Auto-detects seconds vs milliseconds, shows local, UTC and ISO 8601 formats.
Unix Timestamp Converter
Unix epoch time converter with live current epoch, seconds, milliseconds and microseconds support, and a reference table of common epoch values.
Add or Subtract Days Calculator
Add or subtract days, weeks, months or years from any start date and instantly see the resulting date with its weekday. Free, fast and fully private.
Business Days Calculator
Count business (working) days between two dates, excluding weekends and your own holiday list. See working days, weekend days and total days at a glance.
Week Number Calculator
Find the ISO 8601 week number for any date, plus the Monday-to-Sunday date range of that week and the day of the week. Free and 100% in-browser.
Day of Year Calculator
Find the day-of-year number (1–366) for any date, the days remaining in the year, and how far through the year you are as a percentage. Free and private.
Days Until Date Calculator
Count down from today to any future date: see the exact number of days, plus a weeks and a years/months/days breakdown. Free, instant and private.
Leap Year Checker
Check whether any year is a leap year, understand the divisible-by-4/100/400 rule, and see the next and previous leap years. Free and fully in-browser.
Time Duration Calculator
Add or subtract hours, minutes and seconds, or sum a list of durations into a total shown in h:m:s and in total seconds. Free and 100% in-browser.
Hours Between Times Calculator
Calculate the hours and minutes between two clock times, even across midnight, with optional break deduction for timesheets. Free, accurate and private.
Weekday Finder
Find what day of the week any past or future date falls on, and look up the Nth weekday of any month, like the 3rd Monday. Free and fully in-browser.
Months Between Dates Calculator
Count the full calendar months between two dates plus the leftover days, with the total months and total days also shown. Free, accurate and private.
Age in Months Calculator
From a birth date, get exact age in years, months and days plus total months and total days lived. Great for babies and milestones. Free and private.
Quarter of Year Calculator
Find the calendar quarter (Q1–Q4) for any date, its start and end dates, and how many days you are into and left in the quarter. Free and in-browser.
Date Format Converter
Convert any date between ISO 8601, US, European, RFC 2822 and custom token formats. Includes a bulk mode that reformats a whole pasted list at once.
Time Calculator
Add and subtract a chain of times and durations in hh:mm:ss with automatic carry across day boundaries, plus a decimal-hours read-out for payroll.
Military Time Converter
Convert 12-hour AM/PM times to military 24-hour time and back, with a full 0000–2300 reference chart and bulk conversion of a pasted list.
Sunrise Sunset Calculator
Calculate sunrise, sunset, solar noon, day length and civil twilight for any latitude, longitude and date using the NOAA solar position algorithm.
Moon Phase Calculator
Find the moon phase for any date with illumination percentage, moon age in days, a drawn moon disc and the dates of the next new and full moons.
Zodiac Sign Calculator
Enter a birth date to find its western zodiac sign, with element, modality, ruling planet, date range and a warning if the date falls on a cusp.
Chinese Zodiac Calculator
Find your Chinese zodiac animal and element from your birth date, using real Lunar New Year dates so January and February births resolve correctly.
Weeks Between Dates Calculator
Count the exact number of weeks and remaining days between two dates, with an option to count working weeks that exclude Saturdays and Sundays.
Julian Date Converter
Convert between Gregorian dates, Julian Day Number, Modified Julian Date and the 5-digit YYDDD Julian code used on manufacturing date stamps.
Decimal Hours Converter
Convert hours and minutes to decimal hours and back for payroll and invoicing, with rounding to the nearest 1, 5, 6, 10 or 15 minutes and a bulk list mode.
Pomodoro Timer
A configurable Pomodoro timer with work, short break and long break cycles, session counter, completed-cycle log and an optional end-of-session beep.
Online Stopwatch
A precise online stopwatch with lap splits, fastest and slowest lap highlighting, keyboard shortcuts and CSV download of the whole lap table.
Meeting Time Planner
Compare a 24-hour grid across several time zones at once, with working hours shaded, to find the meeting slot that suits everyone on the call.
ICS Calendar File Generator
Build a valid .ics calendar file with UID, DTSTAMP, TZID or UTC times, a reminder and recurrence, then download it for Google Calendar, Outlook or Apple.
RRULE Generator and Tester
Build an RFC 5545 recurrence rule from plain controls or paste one to test it, then read the next occurrences expanded date by date in your browser.
Date Sequence Generator
Generate a list of dates from a rule — every N days, only chosen weekdays, or the nth weekday of each month — skipping weekends and holidays you paste in.
Printable Calendar Generator
Draw a printable month or full-year calendar with ISO week numbers and your own events, then export a print-ready PNG or PDF at A4 or Letter proportions.
Add Business Days Calculator
Add or subtract working days from a date, skipping the weekend days you choose and any holidays you paste in, and see every single day that was skipped.
Daylight Saving Time Calculator
Find the exact daylight saving start and end instants for any IANA time zone and year, with the offsets on either side and the rule each change follows.
ISO 8601 Date Converter
Parse and convert ISO 8601 dates between calendar, basic, week and ordinal forms with the Unix timestamp, plus a full ISO 8601 duration converter.
Fiscal Year Calculator
Map any date to its fiscal year, quarter, period and week for any fiscal start month, including retail 4-4-5, 4-5-4 and 5-4-4 week-based calendars.
Age Difference Calculator
Work out the exact age gap between two birth dates in years, months and days, plus each person's age and the date the older one matched the younger.
Date Range Overlap Calculator
Compare two or more date ranges to find the shared interval, every pairwise overlap, the merged coverage and the gaps, with an inclusive end-date toggle.
Sprint Date Calculator
Generate an agile sprint schedule with start, end, review and retro dates, the working days in each sprint, and CSV or ICS export for the team calendar.
Year Progress Calculator
See how much of the year, quarter, month, week and day has elapsed as a live percentage, with the days remaining and copyable text progress bars.
Nth Weekday of the Month Calculator
Turn a rule like the third Monday of January into a real date for any year, or take a date and find out which occurrence of its weekday it is.
Easter Date Calculator
Work out Easter Sunday for any year from 1583 with the Gregorian computus, plus Orthodox Easter and every movable feast from Ash Wednesday to Pentecost.
US Federal Holidays Calculator
List all eleven US federal holidays for any year with observed dates, weekend shifts applied under EO 11582, and one-click CSV or ICS calendar export.
Golden Hour Calculator
Find golden hour and blue hour times for any place and date, with start and end bearings, window lengths and solar noon from the NOAA solar model.
Equinox and Solstice Calculator
Exact UTC instants of the March and September equinoxes and the June and December solstices for any year, with local times and season lengths.
Hijri Date Converter
Convert Gregorian dates to Hijri and back using the tabular civil Islamic calendar, with Arabic month names, weekday and a sighting adjustment.
Persian (Shamsi) Calendar Converter
Convert Gregorian dates to the Solar Hijri (Shamsi) calendar and back, with Persian month names, weekday, day of year and leap-year status.
GPS Week Number Calculator
Convert UTC to GPS week, day of week and time of week, or back again, with configurable leap seconds and both 10-bit and 13-bit rollover values.
Interval Timer (HIIT and Tabata)
A free online HIIT and Tabata interval timer with work and rest phases, rounds, sets, countdown beeps and a large high-contrast display.
Retirement Date Calculator
Work out your exact retirement date from your date of birth and chosen retirement age, then count the years, days, working days and pay periods left.
Business Hours Calculator
Count working hours between two timestamps against your opening hours, working days, lunch break and public holidays — the arithmetic behind SLA clocks.
Shift Schedule Generator
Build rotating shift rosters from 4-on-4-off, 2-2-3 Panama, DuPont or a custom pattern, with a month calendar per crew and CSV or ICS export.
Security & Encryption Tools
Password Strength Checker
Test how strong your password is with an entropy score, a strength meter, an estimated crack time and clear tips to make it harder to guess — all offline.
Passphrase Generator
Generate strong, memorable passphrases from random words using your browser's cryptographic RNG. Choose word count, separator, capitalization and a number suffix.
Random PIN Generator
Generate cryptographically secure random PIN codes from 4 to 12 digits. Create several at once and copy any PIN with a single click — all offline in your browser.
HMAC Generator
Generate an HMAC of any message with a secret key using HMAC-SHA1, SHA-256 or SHA-512 via the Web Crypto API. Output in hex or Base64, computed entirely offline.
AES Text Encrypter
Encrypt text with a password using AES-256-GCM and PBKDF2 in your browser. Get a single Base64 blob with the salt and IV embedded, ready to store or share safely.
AES Text Decrypter
Decrypt an AES-256-GCM Base64 blob back to plain text with the password used to encrypt it. Wrong passwords are detected and reported — decryption runs offline.
File Checksum Calculator
Calculate SHA-1, SHA-256 and SHA-512 checksums of any file in your browser. Copy each hash and compare against an expected value to verify a download is intact.
Hash Comparer
Compare two hashes or strings side by side to check they match. Get a normalized equality verdict plus per-character diff highlighting, all offline in your browser.
Secure Token Generator
Generate cryptographically secure random tokens for APIs, sessions and keys. Choose the length and a hex, base62 or base64url charset, and create several at once.
Credit Card Validator
Validate a credit card number with the Luhn algorithm and detect the brand (Visa, Mastercard, Amex, Discover and more) locally. Numbers are never sent anywhere.
Caesar Cipher Encoder & Decoder
Encode and decode text with the classic Caesar shift cipher, choose any shift from 1 to 25, and brute-force all 25 shifts to crack unknown messages.
ROT13 Encoder & Decoder
Encode and decode text with ROT13 instantly, add ROT5 for digits, or combine both as ROT18. A self-inverse cipher that hides spoilers and puzzle answers.
Atbash Cipher Encoder & Decoder
Encode and decode text with the Atbash cipher, an ancient mirror-alphabet substitution where A maps to Z. Self-inverse, preserves case and punctuation.
Vigenère Cipher Encoder & Decoder
Encode and decode text with the Vigenère polyalphabetic cipher using a keyword, with a live view of how the repeating key aligns to your message.
XOR Cipher Encoder & Decoder
XOR text against a repeating key and output the result as hex or Base64, then decode hex or Base64 back to text. Fast reversible obfuscation, not encryption.
Rail Fence Cipher Encoder & Decoder
Encode and decode text with the rail fence transposition cipher using 2 to 10 rails, with an optional zigzag visualization of the rail pattern.
NATO Phonetic Alphabet Converter
Convert text to the NATO phonetic alphabet (Alfa Bravo Charlie) and back, with spoken digits like Niner and names for punctuation. Free two-way converter.
Text to Hex Converter
Convert UTF-8 text to a hexadecimal byte string with a choice of separators — space, none, 0x or \x prefixes — and an uppercase toggle. Free text to hex tool.
Hex to Text Converter
Convert hexadecimal back to readable UTF-8 text, accepting hex with or without spaces, 0x or \x prefixes, with clear errors for odd-length or invalid input.
Keyboard Shift Cipher
Encode and decode text with the QWERTY keyboard shift cipher, replacing each key with the one to its left or right. Direction toggle and instant output.
RSA Key Pair Generator
Generate an RSA public and private key pair at 2048, 3072 or 4096 bits, exported as PEM and JWK. Created in your browser and never uploaded.
ECDSA Key Pair Generator
Generate an elliptic-curve key pair for ECDSA signing or ECDH key agreement over P-256, P-384 or P-521, exported as PEM and JWK, entirely in your browser.
JWT Signature Verifier
Verify a JSON Web Token's signature with a shared secret or PEM public key, and check its exp, nbf and iat claims against the clock — all in your browser.
TOTP Code Generator
Generate live TOTP two-factor codes from a Base32 secret with a countdown, previous and next windows, and a ready-made otpauth:// enrolment URI.
Htpasswd Generator
Create .htpasswd lines for Apache and Nginx basic auth using APR1-MD5 or {SHA}, with a random salt and a downloadable file. Hashed in your browser.
PBKDF2 Hash Generator
Derive a PBKDF2 key from a password with a chosen hash, salt and iteration count. Output in hex and Base64, computed locally with the Web Crypto API.
Hash Identifier
Paste a hash and find out what it probably is. Identifies MD5, SHA-1, SHA-256, NTLM, bcrypt, APR1 and more from length, character set and prefix.
CSP Header Generator
Build a Content-Security-Policy header directive by directive, with quick-add source tokens, nonce support and warnings for unsafe combinations.
NTLM Hash Generator
Generate the Windows NTLM hash of any password instantly. Computes MD4 over the UTF-16LE bytes locally, with the intermediate byte string shown.
SHA-384 Hash Generator
Generate a SHA-384 hash of any text or file in hex or Base64. Uses the Web Crypto API, so files are hashed locally and never uploaded anywhere.
Password Entropy Calculator
Measure a password's entropy in bits from its character pool and length, then see estimated crack times for five different attackers. Runs locally.
IBAN Validator
Validate one or many IBANs against the country length table and the ISO 7064 mod-97 checksum, with the reason for every failure and pretty formatting.
Playfair Cipher Encoder & Decoder
Encrypt and decrypt with the Playfair digraph cipher. Shows the 5×5 key square, the digraph splitting and which rule was applied to every pair.
SSL Certificate Decoder
Decode an SSL/TLS certificate to read its subject, issuer, validity dates, SANs, key size and SHA-256 fingerprint. Runs entirely in your browser.
CSR Decoder
Decode a PKCS#10 certificate signing request to verify the subject, key size and requested SANs before you send it to a certificate authority.
ASN.1 DER Decoder
Decode any DER or BER blob into a collapsible ASN.1 tree with tags, lengths, byte offsets and typed values including OIDs, times and integers.
PEM to DER Converter
Convert PEM to raw DER bytes or re-armour DER as PEM, with a hex dump, byte count and automatic detection of the structure you pasted.
JWK to PEM Converter
Convert a JSON Web Key to PEM using Web Crypto. Public keys export as SPKI and private keys as PKCS#8, ready for OpenSSL, Node.js, Go or Java.
PEM to JWK Converter
Convert a PEM public or private key to a JSON Web Key and compute its RFC 7638 thumbprint, all locally in your browser with Web Crypto.
SSH Key Fingerprint Generator
Generate the SHA-256 and MD5 fingerprints of an SSH public key, matching ssh-keygen exactly, with the key type and size read from the blob.
SRI Hash Generator
Generate a Subresource Integrity hash for any script or stylesheet and get a ready-to-paste integrity attribute with the crossorigin setting.
File Encryption Tool
Encrypt and decrypt any file locally with AES-256-GCM and a PBKDF2-derived passphrase key. Nothing is uploaded and no account is needed.
security.txt Generator
Build a valid RFC 9116 security.txt with Contact and Expires fields, URI validation and the optional Policy, Encryption and Canonical directives.
Security Header Analyzer
Paste HTTP response headers and get a per-header pass, warn or fail verdict plus an overall grade covering HSTS, CSP, cookies and information leaks.
Permissions-Policy Generator
Build a Permissions-Policy header from a checklist of browser features, with the matching iframe allow attribute and the legacy Feature-Policy form.
WPA PSK Generator
Derive the 256-bit WPA/WPA2 pre-shared key from an SSID and passphrase using PBKDF2-HMAC-SHA1 with 4096 iterations, exactly as IEEE 802.11i specifies.
MD4 Hash Generator
Generate an MD4 hash of any text or file in hex and Base64, with a UTF-16LE mode for NTLM password hashes. Runs entirely offline in your browser.
RIPEMD-160 Hash Generator
Compute the RIPEMD-160 digest of text or a file in hex and Base64, plus Bitcoin's HASH160 double hash. Everything runs locally in your browser.
SHA-3 Hash Generator
Generate SHA3-224, SHA3-256, SHA3-384, SHA3-512 or Ethereum's Keccak-256 hash of text or a file, in hex and Base64, entirely in your browser.
MySQL Password Hash Generator
Generate MySQL PASSWORD() and OLD_PASSWORD() hashes from any password, with ready-to-run SQL. Computed locally in your browser, never uploaded.
Django Password Hash Generator
Create a pbkdf2_sha256 password hash for Django with a random salt and your chosen iteration count, or verify a password against an existing hash.
IMEI Validator
Check whether an IMEI is valid with the Luhn algorithm, calculate a missing check digit, split out the TAC and serial, and validate a whole list at once.
VIN Validator & Decoder
Validate a 17-character VIN with the ISO 3779 check digit, and decode the world region, manufacturer prefix, model-year code and plant code.
Barcode Check Digit Calculator
Calculate or verify the GS1 check digit for EAN-13, EAN-8, UPC-A, UPC-E, GTIN-14, ITF-14 and SSCC-18, one code at a time or a whole pasted list.
ABA Routing Number Validator
Validate a 9-digit US bank routing number with the ABA checksum, calculate a missing ninth digit, and decode what the first two digits mean.
Enigma Machine Simulator
A working Enigma I / M3 simulator with rotors I–V, reflectors A, B and C, ring settings, start positions and a full plugboard. Runs in your browser.
Affine Cipher
Encrypt and decrypt with the affine cipher E(x) = (ax + b) mod 26, see the substitution alphabet, and brute-force all 312 keys to crack a message.
Polybius Square Cipher
Encode and decode with a Polybius square in 5×5 or 6×6 form, with an optional keyword, number or letter coordinates and the grid drawn out for you.
Generators
Password Generator
Generate strong random passwords with cryptographically secure randomness. Choose length and character sets, see entropy strength, copy instantly.
QR Code Generator
Create QR codes for URLs, Wi-Fi, email, phone and SMS. Pick size, colors and error correction, then download a crisp PNG — free and private.
Barcode Generator
Generate Code 128 barcodes online with checksum, adjustable bar width and height, optional text label, and PNG download. Free and fully private.
Random Number Generator
Generate random numbers in any range with cryptographically secure randomness. Multiple numbers, no-repeat mode, sorting, plus dice and coin presets.
Random Name Generator
Free random name generator online — create realistic full names or unique usernames instantly. Randomize names, choose gender, count and format, then copy.
Dice Roller
Roll virtual dice online — d4, d6, d8, d10, d12, d20 or custom-sided. Roll many dice at once, see every result and the total, with fair random rolls.
Coin Flip
Flip a virtual coin online — heads or tails with a fair 50/50 result. Flip one coin or many at once and keep a running tally of heads versus tails.
Yes or No Generator
Random yes or no answer generator. Ask a question and get a clear Yes or No, with an optional Maybe. A fast, unbiased decision maker for quick choices.
Random Letter Generator
Generate random letters from A to Z. Choose uppercase or lowercase, how many letters, and whether repeats are allowed. Fast, fair and fully private.
Random List Picker
Paste a list and pick random winners without repeats, or shuffle the whole list. A fair random name and item picker for giveaways, draws and raffles.
Random Team Generator
Randomly split a list of names into balanced teams. Choose the number of teams or a team size and get evenly distributed, fair groups in one click.
Random Date Generator
Generate random dates between a start and end date. Choose how many, get ISO and human-readable formats, and copy the list. Fast, fair and private.
Random IP Generator
Generate random IPv4 and IPv6 addresses. Choose how many, pick private-range IPv4, and copy the list. Great test data for networking, apps and demos.
MAC Address Generator
Generate random MAC addresses online. Choose colon or hyphen separators, uppercase or lowercase, and how many. Fast, valid test data, fully private.
PIN Generator
Generate random numeric PIN codes from 4 to 12 digits. Create many at once, optionally with no repeated digits, using secure randomness. Free and private.
Random String Generator
Generate random strings with a custom length and character sets — uppercase, lowercase, digits and symbols. Create many at once with secure randomness.
Username Generator
Generate cool, memorable usernames from adjective and noun combos with numbers. Pick a style and count, then copy handles for gaming, social and signups.
Random Emoji Generator
Generate random emojis from a curated list. Pick how many you want and copy them instantly for chats, captions, usernames and creative prompts.
Random Wheel Picker
Paste a list, spin the wheel and let it pick a winner at random. Add weights, remove winners after each spin and keep a full history of results.
Business Name Generator
Generate business name ideas from your keyword and industry. Mix compound, prefix, suffix and portmanteau patterns, filtered by length and syllables.
Random Word Generator
Generate random English words filtered by part of speech, length and starting letter. Draw unique words or allow repeats, then copy or download the list.
WiFi QR Code Generator
Create a WiFi QR code so guests join your network by scanning instead of typing the password. Download the QR as PNG or SVG, or print a network card.
vCard QR Code Generator
Turn your contact details into a vCard QR code people can scan to save you straight to their phone. Download it as PNG, SVG or a .vcf contact file.
Bulk QR Code Generator
Paste a list of URLs or codes and generate a QR code for every line at once. Preview them in a labelled grid, save each as PNG or export one print sheet.
Random Address Generator
Generate correctly formatted fake addresses for the US, UK and Canada. Ideal for QA fixtures, form testing and demos, with one-click CSV export.
Random Phone Number Generator
Generate format-valid test phone numbers from officially reserved fictional ranges for the US, Canada, UK and Australia, in national and E.164 format.
Lottery Number Generator
Generate random lottery numbers for Powerball, Mega Millions, EuroMillions, UK Lotto and custom draws — duplicate-free lines with a separate bonus ball.
Bingo Card Generator
Generate unique 5×5 B-I-N-G-O cards with the standard 1–75 column ranges and a free centre square. Download individual PNGs or one printable sheet.
Secret Santa Generator
Draw Secret Santa names online with no signup or email. Nobody draws themselves, couples can be excluded, and each match stays hidden until it is tapped.
Seeded Random Number Generator
Generate repeatable random numbers from a text seed. The same seed always returns the same list, with ranges, decimals, a no-duplicates mode and CSV export.
Bulk Password Generator
Generate up to 1000 strong passwords at once with a length and character policy, minimum counts per character set, ambiguous-character filtering and entropy in bits.
Test Credit Card Number Generator
Generate fake but format-valid card numbers for QA testing. Real issuer prefixes, a correct Luhn check digit, fake expiry and CVV, plus one-click CSV export.
IBAN Generator
Generate test IBANs for 26 countries with correct ISO 13616 check digits. Right length, right character pattern, MOD-97 validated and exportable as CSV.
Random Email Address Generator
Generate random test email addresses from name patterns and a reserved example domain. Every address is grammar-checked, unique within the batch and CSV ready.
Fantasy Name Generator
Generate fantasy names for elves, dwarves, orcs, humans, dragons, taverns and places. Built from syllable tables with optional surnames, epithets and a saved seed.
Team Name Generator
Generate team name ideas for sports, gaming, quiz night or the office. Mix patterns, force alliteration, cap the length, then lock the names you like and reroll.
Random Playing Card Generator
Deal random playing cards from a real 52-card deck shuffled with Fisher–Yates. Draw without replacement, add jokers, use multiple decks and track what remains.
Sudoku Generator
Generate printable sudoku puzzles with a guaranteed unique solution. Choose easy to expert, rebuild any puzzle from its seed and download the answer key.
Maze Generator
Generate printable mazes of any size with a guaranteed single solution path. Set the grid, overlay the answer route and download a crisp PNG.
Tournament Bracket Generator
Build a printable single or double elimination bracket from your entrant list. Automatic byes, standard seeding or a random draw, and numbered matches throughout.
Round Robin Schedule Generator
Create a full round robin fixture list where every team plays every other exactly once. Balanced home and away, byes for odd counts and one-click CSV export.
QR Code Generator With Logo
Add your logo to the centre of a QR code without breaking it. Error correction level H, a capped overlay area and a live scannability warning.
Identicon Generator
Turn any username, email or ID into a GitHub-style identicon. SHA-256 decides the pattern and the colour, so the same text always draws the same avatar.
License Key Generator
Generate software licence keys from a mask like XXXXX-XXXXX-XXXXX-XXXXX, with a Luhn mod N or MOD 97-10 check character so your app can reject typos offline.
SKU Generator
Cross your brand, category, colour and size lists into every product variant, apply abbreviation rules and a sequence number, and export the SKUs as CSV.
Number Sequence Generator
Generate a numeric list from a start, step and count or end value, with zero padding, prefixes, thousands separators and per-line, CSV, JSON or SQL output.
Magic Square Generator
Build a magic square of any order from 3 to 24 using the Siamese, criss-cross and LUX methods, with every row, column and diagonal checked against the magic constant.
Nonogram Puzzle Generator
Draw a picture or trace an image into a grid and get a printable nonogram, with a solver that tells you honestly whether the clues can be worked out by logic alone.
Weighted Random Picker
Pick a winner from a list where every option carries its own weight, with or without replacement, and see each entry's true probability next to what the run drew.
Random Coordinates Generator
Generate random latitude and longitude points spread evenly by area over the globe or inside a bounding box, in decimal or DMS, with CSV and GeoJSON export.
Random Numbers by Distribution
Draw seeded random samples from uniform, normal, log-normal, exponential, Poisson and binomial distributions, with sample statistics, a histogram and CSV export.
Raffle Ticket Generator
Create numbered raffle tickets with matching stubs on A4 or Letter, with your event name, price, date and accent colour, exported as a print-ready PDF.
Random Dungeon Map Generator
Generate a seeded tabletop dungeon with BSP rooms, L-shaped corridors, doors and stairs, drawn on a square grid with a numbered room key and PNG export.
Audio Tools
WAV to MP3 Converter
Convert WAV audio to MP3 online for free. Shrink large uncompressed WAV files into small, shareable MP3s right in your browser — nothing is ever uploaded.
MP3 to WAV Converter
Convert MP3 to WAV online for free. Decode compressed MP3 files to uncompressed 16-bit PCM WAV audio right in your browser — nothing is ever uploaded.
MP3 to OGG Converter
Convert MP3 to OGG Vorbis online for free. Re-encode MP3 audio to open, royalty-free OGG right in your browser — nothing is ever uploaded to a server.
OGG to MP3 Converter
Convert OGG to MP3 online for free. Turn OGG Vorbis audio into universally playable MP3 files right in your browser — nothing is ever uploaded to a server.
M4A to MP3 Converter
Convert M4A to MP3 online for free. Turn Apple M4A/AAC audio into universally playable MP3 files right in your browser — nothing is ever uploaded.
AAC to MP3 Converter
Convert AAC to MP3 online for free. Turn AAC audio into universally compatible MP3 files right in your browser — nothing is ever uploaded to a server.
FLAC to MP3 Converter
Convert FLAC to MP3 online for free. Shrink lossless FLAC audio into small, shareable MP3 files right in your browser — nothing is ever uploaded.
MP3 to M4A Converter
Convert MP3 to M4A online for free. Re-encode MP3 audio to AAC-based M4A for Apple devices right in your browser — nothing is ever uploaded.
WAV to OGG Converter
Convert WAV to OGG Vorbis online for free. Compress large WAV files into small, royalty-free OGG audio right in your browser — nothing is ever uploaded.
Compress Audio
Compress audio online for free. Reduce MP3 file size by choosing a target bitrate from 64 to 320 kbps right in your browser — nothing is ever uploaded.
Trim Audio
Trim audio online for free. Cut a clip from any audio file by setting start and end times, exported as MP3 right in your browser — nothing is ever uploaded.
Audio Volume Changer
Change audio volume online for free. Boost quiet recordings or lower loud ones from 0 to 300%, exported as MP3 in your browser — nothing is ever uploaded.
Change Audio Speed
Change audio speed online for free. Speed up or slow down audio from 0.5x to 2x without changing pitch, exported as MP3 — nothing is ever uploaded.
Audio Converter
Convert audio online for free. Turn any file into MP3, WAV, OGG, M4A or FLAC right in your browser with one tool — nothing is ever uploaded to a server.
MP3 to AAC Converter
Convert MP3 to AAC online for free. Re-encode MP3 audio to the more efficient AAC codec at your chosen bitrate, entirely in your browser — nothing is uploaded.
MP3 to FLAC Converter
Convert MP3 to FLAC online for free. Decode MP3 audio into a lossless FLAC file for archiving or editing, right in your browser — nothing is ever uploaded.
WAV to FLAC Converter
Compress WAV to FLAC online for free. Genuine lossless compression makes files about half the size with identical audio — all in your browser, nothing uploaded.
WAV to M4A Converter
Convert WAV to M4A online for free. Encode bulky WAV recordings into compact AAC audio in an M4A container, right in your browser — nothing is uploaded.
FLAC to WAV Converter
Convert FLAC to WAV online for free. Decode lossless FLAC into uncompressed 16 or 24-bit PCM WAV for editing or burning — all in your browser, nothing uploaded.
M4A to WAV Converter
Convert M4A to WAV online for free. Decode iPhone voice memos and AAC audio into uncompressed PCM WAV for editing — all in your browser, nothing uploaded.
AAC to WAV Converter
Convert AAC to WAV online for free. Decode raw AAC streams into uncompressed 16-bit PCM WAV audio right in your browser — nothing is ever uploaded.
OGG to WAV Converter
Convert OGG to WAV online for free. Decode OGG Vorbis and Opus audio into uncompressed PCM WAV for editing and playback — in your browser, nothing uploaded.
OPUS to MP3 Converter
Convert OPUS to MP3 online for free. Turn WhatsApp and Telegram voice notes into universally playable MP3 files right in your browser — nothing is uploaded.
Audio Bitrate Changer
Change audio bitrate online for free. Re-encode MP3, M4A or OGG to an exact CBR or VBR bitrate — like MP3 at 128 kbps — in your browser, nothing uploaded.
Audio Sample Rate Converter
Convert audio sample rate online for free. Resample to 8, 16, 44.1 or 48 kHz for video, speech tools or telephony — right in your browser, nothing uploaded.
Stereo to Mono Converter
Convert stereo audio to mono online for free. Mix both channels or keep only the left or right channel — right in your browser, nothing is ever uploaded.
Mono to Stereo Converter
Convert mono audio to stereo online for free. Duplicate the channel for true dual mono or add subtle Haas-delay widening — in your browser, nothing uploaded.
Merge Audio Files (Joiner)
Merge multiple audio files into one MP3 online for free. Join songs and voice notes in order, with optional crossfade — everything stays in your browser.
Audio Fade In and Out
Add smooth fade in and fade out effects to any audio file online for free. Set fade lengths in seconds and export an MP3 — nothing is ever uploaded.
Reverse Audio
Reverse any audio file online for free. Play songs, voice memos and sound effects backwards and download the result as MP3 — 100% in your browser.
Audio Pitch Changer
Change the pitch of any audio file in semitones without changing its speed. Free online pitch shifter that runs entirely in your browser — no upload.
Audio Normalizer
Normalize audio loudness online for free to broadcast and streaming standards (EBU R128 / LUFS). Runs fully in your browser — files are never uploaded.
Remove Silence from Audio
Automatically detect and cut silent gaps from recordings, podcasts and voice notes online. Adjustable threshold and gap length — 100% local, no upload.
Bass Booster
Boost the bass of any song or recording online for free. Adjustable low-frequency gain and treble control, processed entirely in your browser.
Vocal Remover (Karaoke)
Remove centered vocals from stereo songs to make karaoke tracks online. Free phase-cancellation vocal remover that runs 100% in your browser.
Slowed and Reverb Maker
Make slowed and reverb edits of any song online for free. Adjust the slow-down amount and reverb depth, then download an MP3 — no upload, no watermark.
Ringtone Maker
Cut any song into a phone ringtone online for free. Trim, fade and export iPhone M4R or Android MP3 ringtones right in your browser — no upload.
Audio Waveform Generator
Turn any audio file into a waveform image online for free. Customize colors, bars and size, then download a transparent PNG — audio never leaves your device.
Audio Spectrogram Generator
Generate a spectrogram image from any audio file online for free. Visualize frequency content over time and download a PNG — 100% in your browser.
Online Voice Recorder
Record your voice online with your microphone — free, private and unlimited. Pause, resume, preview and download recordings; nothing ever leaves your tab.
Remove Background Noise From Audio
Clean hiss, hum, air conditioning and room noise out of any recording. Two denoising modes plus a rumble filter, all running inside your browser.
Audio Equalizer (10-Band)
Shape any audio file with a 10-band graphic equalizer. Boost bass, lift vocals or fix a dull recording, then export MP3 or WAV without uploading a thing.
Split Audio by Silence
Automatically cut a long recording into separate tracks wherever it goes quiet. Ideal for tape rips, voice memos and interview sessions, with no upload.
Split Audio Into Parts
Cut an audio file into equal chunks or at your own timestamps. Great for long podcasts, lectures and upload size limits, and nothing leaves your browser.
BPM Detector
Find the tempo of any song in beats per minute. Upload nothing: the track is decoded and analysed in your browser, with alternates and a confidence score.
Song Key Finder
Work out what key a song is in, with its Camelot wheel code for harmonic mixing. Analysed in your browser using chroma and Krumhansl-Schmuckler profiles.
LUFS Loudness Meter
Measure integrated LUFS, loudness range and true peak to ITU-R BS.1770-4, and compare against Spotify, Apple Music and broadcast targets. Nothing is uploaded.
MP3 Tag Editor (ID3)
Edit the title, artist, album, year, track and cover art stored in an MP3. Writes a clean ID3v2.3 tag in your browser without re-encoding the audio.
Split Stereo Into Left and Right
Separate a stereo file into two mono tracks, one per channel. Useful for karaoke stems, dual-mic interviews and checking a faulty side, with no upload.
Nightcore Maker
Turn any song into a nightcore edit by speeding it up and raising the pitch together. Adjustable speed, optional treble sparkle, and no upload required.
8D Audio Maker
Turn any song into 8D audio that circles your head in headphones. Adjustable rotation speed, depth, stereo width and room echo, processed in your browser.
Add Background Music to Audio
Mix background music under a voiceover, podcast or narration, with automatic ducking so the speech stays clear. Both files stay inside your browser.
Video Tools
MP4 to MP3 Converter
Extract the audio from an MP4 video and save it as an MP3 online, free. Pull music or speech out of any video right in your browser — nothing is uploaded.
WebM to MP4 Converter
Convert WebM videos to MP4 online, free. Re-encode WebM to a compatible H.264 MP4 right in your browser — nothing is uploaded and your files stay private.
MOV to MP4 Converter
Convert MOV (QuickTime) videos to MP4 online, free. Turn iPhone and Mac MOV files into universal H.264 MP4 in your browser — nothing is uploaded.
AVI to MP4 Converter
Convert AVI videos to MP4 online, free. Modernise old AVI files into compact H.264 MP4 right in your browser — nothing is uploaded and files stay private.
MKV to MP4 Converter
Convert MKV videos to MP4 online, free. Turn Matroska MKV files into universally playable H.264 MP4 in your browser — nothing is uploaded.
MP4 to WebM Converter
Convert MP4 videos to WebM online, free. Create lightweight VP8 WebM files for the web right in your browser — nothing is uploaded and files stay private.
Video to MP3 Converter
Extract audio from any video and save it as MP3, free. Pull sound from MP4, MOV, WebM, MKV and more in your browser — nothing is uploaded.
MP4 to GIF Converter
Convert MP4 videos to animated GIFs online, free. Turn clips into shareable GIFs with adjustable FPS and width in your browser — nothing is uploaded.
GIF to MP4 Converter
Convert animated GIFs to MP4 online, free. Shrink heavy GIFs into small H.264 MP4 videos in your browser — nothing is uploaded and files stay private.
Compress Video
Compress video online for free to shrink file size. Reduce MP4 and other videos with adjustable quality in your browser — nothing is uploaded.
Trim Video
Trim and cut video online for free. Set start and end times to keep just the part you want, right in your browser — nothing is uploaded.
Mute Video
Mute video online for free by removing the audio track. Strip sound from MP4 and other videos in your browser — fast, and nothing is uploaded.
Resize Video
Resize video resolution online for free. Scale videos to 1080p, 720p, 480p, 360p or a custom width in your browser — nothing is uploaded.
Video Converter
Free online video converter. Convert between MP4, WebM, MKV and MOV right in your browser — pick an output format, nothing is uploaded.
MP4 to AVI Converter
Convert MP4 videos to AVI online, free. Re-encodes to MPEG-4 video with MP3 audio for older players and editors — all in your browser, nothing uploaded.
MP4 to MKV Converter
Convert MP4 to MKV instantly with zero quality loss. Streams are copied into a Matroska container, not re-encoded — free, private, in your browser.
MP4 to MOV Converter
Convert MP4 to MOV (QuickTime) online with no quality loss. Streams are remuxed, not re-encoded, so it takes seconds — private, in your browser.
FLV to MP4 Converter
Convert old Flash FLV videos to MP4 online, free. Re-encodes to H.264 + AAC so clips play on any modern device — processed locally, never uploaded.
TS to MP4 Converter
Convert TS (MPEG transport stream) files to MP4 online, free. Lossless remux fixes downloaded stream segments in seconds — local, nothing uploaded.
WebM to GIF Converter
Convert WebM videos to animated GIFs online, free. Palette-optimized encoding for sharp colors, with FPS, width and clip controls — nothing uploaded.
WebM to MP3 Converter
Extract the audio from a WebM file and save it as MP3 online, free. Choose the bitrate and convert entirely in your browser — nothing is uploaded.
Video to WAV Converter
Extract audio from any video as an uncompressed WAV file online, free. Ideal for transcription, editing and analysis — processed locally, never uploaded.
GIF Resizer
Resize animated GIFs online without losing the animation. Scales every frame with palette-optimized re-encoding — free, private, in your browser.
GIF Compressor
Compress animated GIFs online, free. Reduce frame rate, colors and dimensions — the three levers that actually shrink a GIF — with before/after sizes shown.
Extract Frame from Video
Grab a still frame from any video at an exact timestamp and save it as a lossless PNG — free, in your browser, with nothing uploaded anywhere.
Video Contact Sheet Maker
Generate a contact sheet from any video — a grid of evenly spaced thumbnails in one image. Set the interval and grid size; nothing is uploaded.
Compress Video to Target Size
Compress a video to an exact target size in MB — 8 MB, 10 MB, 25 MB and more. Bitrate is calculated from duration automatically. Nothing is uploaded.
Crop Video
Crop a video online free — cut it to 16:9, 9:16, 1:1, 4:5 or exact pixel dimensions right in your browser. Nothing is uploaded and there is no watermark.
Rotate Video
Rotate a video 90° clockwise, 90° counter-clockwise or 180° online, free. Fix sideways or upside-down phone clips in your browser — nothing is uploaded.
Flip Video
Flip a video horizontally or vertically online, free. Mirror a selfie-camera clip so text reads correctly — all in your browser, nothing uploaded.
Merge Videos (Joiner)
Merge multiple videos into one MP4 online, free. Join clips with different sizes and formats in order — processed in your browser, never uploaded.
Change Video Speed
Speed up or slow down a video from 0.25× to 4× online, free. Audio stays in sync with its pitch preserved — all in your browser, nothing uploaded.
Reverse Video
Reverse a video so it plays backwards, audio included, online and free. Great for rewind effects — processed in your browser, never uploaded.
Blur Video
Blur a whole video with gaussian or box blur, or make a blurred-background vertical version, online and free. Runs in your browser — never uploaded.
Change Video Frame Rate (FPS)
Convert a video to 24, 25, 30, 50, 60 or any custom FPS online, free. Fix frame-rate mismatches in your browser — nothing is ever uploaded.
Video Aspect Ratio Converter
Convert a video between 16:9, 9:16, 1:1 and 4:5 online free. Crop to fill or letterbox with a chosen color — right in your browser, never uploaded.
Add Audio to Video
Add music or a voice-over to a video online, free. Replace the original soundtrack or mix the new audio into it — in your browser, nothing uploaded.
Add Watermark to Video
Overlay a logo or watermark image on a video online, free. Set corner position, size and opacity — processed in your browser, nothing uploaded.
Screen Recorder
Record your screen, window or browser tab free, right from this page — optional mic voice-over, live preview, and a WebM download. Nothing is uploaded.
Video to Image Sequence
Turn a video into a numbered sequence of PNG or JPEG stills. Choose how many frames per second to sample, preview every frame and download the ones you want.
Loop Video
Repeat a video a set number of times or loop it until it reaches a target length. Shows the resulting duration before you run it, with no upload and no watermark.
Boomerang Video Maker
Turn a short clip into a boomerang that plays forwards then backwards in one loop. Pick the speed and output size, with no upload, no account and no watermark.
Video Colour Corrector
Adjust brightness, contrast, saturation, gamma, hue and sharpening on a video with labelled sliders. Runs in your browser with no upload and no watermark.
Video Fade In and Out
Fade a video in from black at the start and out at the end, with matching audio fades. The out point is worked out from the clip length for you, with no upload.
Split Video Into Parts
Cut a video into equal parts or fixed-length chunks and download each one separately. Lossless by default, with an option for exact cut points. Nothing is uploaded.
Remove Black Bars From Video
Detect and crop the letterbox or pillarbox bars around a video automatically. Samples the footage, finds the real picture area and re-encodes without the bars.
Side-by-Side Video Maker
Put two videos next to each other, stacked, or one inside the other as picture-in-picture. Choose which clip's sound to keep or mix both, all in your browser.
Photo Slideshow Video Maker
Turn photos into an MP4 slideshow with crossfades and background music. Reorder the images, set how long each is shown, and render it right in your browser.
Video Metadata Viewer
See a video's duration, resolution, frame rate, codecs, rotation flag and creation date. Reads MP4, MOV, WebM and MKV headers without uploading the file.
Video Bitrate Calculator
Work out the bitrate that fits a target file size, or the file size a bitrate produces. Includes audio budget, container overhead and recommended bitrates by resolution.
SMPTE Timecode Calculator
Convert between SMPTE timecode and frame numbers at 23.976 to 60 fps, with true drop-frame arithmetic, plus add and subtract two timecodes.
Health & Fitness Calculators
Calorie Calculator
Work out how many calories you need each day to lose, maintain or gain weight, using the Mifflin-St Jeor equation with metric or imperial units.
TDEE Calculator
Estimate your total daily energy expenditure from BMR and activity level, with Mifflin-St Jeor and Katch-McArdle options and a full activity comparison table.
BMR Calculator
Calculate your basal metabolic rate with Mifflin-St Jeor, revised Harris-Benedict or Katch-McArdle, in metric or imperial, and compare all three side by side.
Body Fat Calculator
Estimate body fat percentage with the US Navy circumference method using neck, waist and hip measurements, and see your fat mass and lean mass in kg or lb.
Lean Body Mass Calculator
Calculate lean body mass and fat mass from height and weight using the Boer, James and Hume formulas, or directly from a known body fat percentage.
Ideal Weight Calculator
Find your ideal body weight for your height using the Robinson, Miller, Devine and Hamwi formulas, plus the healthy BMI range, in kg or pounds.
Macro Calculator
Turn a daily calorie target into grams of protein, carbohydrate and fat using preset or custom macro splits, with a per-meal breakdown and metric or imperial input.
Protein Intake Calculator
Work out how much protein to eat per day in grams, based on your body weight and training goal, with metric and imperial input and a per-meal split.
Water Intake Calculator
Estimate how much water to drink each day from your body weight, exercise time and climate, with results in litres, millilitres, US fluid ounces and glasses.
Waist to Hip Ratio Calculator
Calculate your waist-to-hip ratio and waist-to-height ratio from tape measurements in centimetres or inches, with the WHO risk bands for men and women.
Pace Calculator
Calculate running pace, finish time or distance from any two of the three, in min/km or min/mile, with equivalent times for 5K, 10K, half and full marathon.
Steps to Calories Calculator
Convert daily steps into calories burned and distance walked, using stride length from your height, your body weight and MET values for walking pace.
Due Date Calculator
Estimate your pregnancy due date from your last period, conception date or IVF transfer, with gestational age today and trimester dates using Naegele's rule.
Sleep Cycle Calculator
Find the best times to go to bed or wake up based on 90-minute sleep cycles, including the time it takes you to fall asleep. Works forwards and backwards.
Ovulation Calculator
Estimate your ovulation day and six-day fertile window from your last period and cycle length, projected across the next six cycles.
Period Calculator
Predict your next period start and end dates from your last period, cycle length and period duration, shown on a shaded calendar.
Pregnancy Week Calculator
Work out how many weeks and days pregnant you are, plus your trimester and due date, from your last period, conception date or a known due date.
Target Heart Rate Calculator
Calculate your target heart rate zones with the Karvonen reserve method and the percent-of-maximum method, from an estimated or measured maximum heart rate.
One Rep Max Calculator
Estimate your 1RM from a set of reps using the Epley, Brzycki, Lombardi, Wathen and O'Conner formulas side by side, with a training load table.
A1C Calculator
Convert HbA1c to estimated average glucose and back using the ADAG equation, in mg/dL and mmol/L, with IFCC units and ADA reference bands.
Blood Pressure Calculator
Classify a blood pressure reading against the 2017 ACC/AHA categories and calculate pulse pressure and mean arterial pressure, with an averaging mode.
Body Surface Area Calculator
Calculate body surface area in m² with the Du Bois, Mosteller, Haycock, Boyd and Gehan-George formulas side by side, in metric or imperial units.
VO2 Max Calculator
Estimate VO2 max from a Cooper 12-minute run, a Rockport one-mile walk or your resting heart rate, then compare it against age and sex fitness norms.
Calories Burned Calculator
Calculate calories burned from MET values for 57 activities, using the ACSM equation kcal = MET × 3.5 × kg ÷ 200 × minutes, in kg or lb.
Race Time Predictor
Predict your 5K, 10K, half marathon and marathon times from one recent race using Riegel's formula, with pace per km and per mile for each.
Weight Loss Percentage Calculator
Calculate what percentage of your body weight you have lost, your weekly rate, progress towards a goal weight and a projected goal date.
Calorie Deficit Calculator
Work out the daily calorie deficit and intake target needed to reach a goal weight by a chosen date, with a safe intake floor and a weekly loss rate check.
Net Carbs Calculator
Add up net carbs from nutrition labels by subtracting fibre and sugar alcohols, with erythritol excluded, and track the day's total against your carb limit.
Glycemic Load Calculator
Calculate glycemic load from glycemic index and carbs per serving, using a built-in table of 65 common foods, with low/medium/high bands and a daily total.
Alcohol Calories Calculator
Calculate the calories in beer, wine, spirits and cocktails from volume and ABV, plus standard drinks and units, with a weekly total across your drinks.
Blood Alcohol Calculator
Estimate blood alcohol concentration with the Widmark equation from body weight, drinks and time elapsed, with an editable r factor and elimination rate.
Caffeine Half-Life Calculator
See how much caffeine is still in your system at bedtime by modelling each coffee, tea and energy drink with an editable half-life and a decay curve.
Intermittent Fasting Calculator
Build a 16:8, 18:6, 20:4, OMAD, 5:2 or alternate-day fasting schedule from your first or last meal, with window times, a live countdown and a 7-day plan.
Sweat Rate Calculator
Calculate your sweat rate in litres and fluid ounces per hour from pre and post exercise weights, with replacement volumes and an estimated sodium loss.
Cholesterol Ratio Calculator
Calculate total:HDL, LDL:HDL and triglyceride:HDL ratios plus non-HDL cholesterol and Friedewald LDL, in mg/dL or mmol/L, against standard reference bands.
eGFR Calculator
Estimate kidney function with the race-free CKD-EPI 2021 creatinine equation plus Cockcroft-Gault clearance, with µmol/L switching and KDIGO staging.
IV Drip Rate Calculator
Nursing infusion maths in one place: drops per minute from a drop factor, pump rate in mL/hour, infusion time, and mcg/kg/min to mL/hour conversion.
Smoking Cost Calculator
See what smoking costs per day, month, year and decade, what the same money would grow to if invested, and how much you have saved since your quit date.
FFMI Calculator
Work out your fat-free mass index and height-adjusted FFMI from weight, height and body fat, with the usual interpretation bands and their limits.
Wilks Calculator
Score a powerlifting total with the Wilks coefficient and DOTS side by side, in kilograms or pounds, for the three-lift total or a single lift.
Barbell Plate Calculator
Work out exactly which plates go on each side of the bar for any target weight, using only the plates you own, plus a matching warm-up ladder.
Cycling Power Calculator
Estimate the watts needed for a given cycling speed, or the speed a given power buys you, from CdA, rolling resistance, gradient, wind and air density.
Swim Pace Calculator
Convert swim times to pace per 25, 50 and 100 in metres and yards, convert between pool courses, build split ladders and calculate SWOLF.
Steps to Miles Calculator
Convert steps to miles and kilometres using a stride length estimated from your height, or your own measured stride, plus the reverse calculation.
Waist to Height Ratio Calculator
Divide your waist by your height to get your WHtR, read it against the 0.4, 0.5 and 0.6 screening boundaries, and compare it with your BMI.
Conception Date Calculator
Work back from a due date, last period or ultrasound to the likely conception window, with cycle length taken into account and a full timeline.
Pregnancy Weight Gain Calculator
Compare your weight gain with the Institute of Medicine ranges for your pre-pregnancy BMI, week by week, for a singleton or twin pregnancy.
Child Height Predictor
Predict a child's adult height with the mid-parental method from both parents' heights, with a realistic range and the double-height-at-two cross-check.
Dog Age Calculator
Convert dog years to human years with the epigenetic clock formula and the size-band table side by side, plus the reverse and a cat conversion.
Sleep Debt Calculator
Log up to fourteen nights against your sleep target to see your running sleep debt, how long it takes to repay, and bedtimes in 90-minute cycles.
Anion Gap Calculator
Calculate the serum anion gap, the potassium-inclusive variant, the albumin-corrected gap and the delta ratio, with editable reference ranges.
Corrected Calcium Calculator
Adjust total serum calcium for a low albumin using Payne's correction, in mg/dL or mmol/L, with an editable factor and reference range.
QTc Calculator
Correct a measured QT interval for heart rate with Bazett, Fridericia, Framingham and Hodges side by side, using editable prolongation thresholds.
Blood Volume Calculator
Estimate total blood volume with Nadler's equations and Gilcher's rule of five, plus red cell mass, plasma volume and maximum allowable blood loss.
Creatinine Clearance Calculator
Estimate creatinine clearance with the Cockcroft-Gault equation using actual, ideal or adjusted body weight, in mg/dL or µmol/L.
Parkland Formula Calculator
Work out 24-hour burn fluid resuscitation from weight and %TBSA, with a rule-of-nines picker, hourly rates and a catch-up rate from the injury time.
Pediatric Dosage Calculator
Convert a mg per kg paediatric dose into milligrams and millilitres, apply single and daily maximums, and compare Clark's and Young's rules.
APGAR Score Calculator
Score a newborn's appearance, pulse, grimace, activity and respiration at 1, 5 and 10 minutes, with totals, bands and a copyable summary.
Glasgow Coma Scale Calculator
Score eye, verbal and motor responses to get a GCS total in E V M notation, with a paediatric scale and proper not-testable handling.
CHA₂DS₂-VASc Calculator
Score stroke risk in atrial fibrillation with CHA2DS2-VASc, read the annual risk from an editable table, and compute HAS-BLED alongside it.
Alcohol Units Calculator
Add up UK alcohol units, national standard drinks, grams of pure ethanol and calories across a week of drinks, with editable national standards.
Dog Food Portion Calculator
Work out how much to feed a dog each day from resting energy requirement, a life-stage factor and the food's calorie density, in grams and cups.
Student & Education Tools
GPA Calculator
Work out your GPA on a 4.0, 5.0 or 10-point scale, weighted or unweighted, with credit hours per course and honours or AP bonus points.
CGPA to Percentage Calculator
Convert CGPA to percentage using the ×9.5 rule, a proportional formula or your own multiplier, on a 10, 5 or 4-point scale with the working shown.
Percentage to CGPA Calculator
Convert percentage marks into CGPA on a 10, 5 or 4-point scale using the ÷9.5 rule, a proportional formula or your own divisor, with the working shown.
Grade Calculator
Add up assignments, quizzes and exams as points earned out of points possible to get your overall course percentage and letter grade instantly.
Final Grade Calculator
Find out exactly what score you need on the final exam to reach the course grade you want, plus the best and worst grades still possible.
Weighted Grade Calculator
Calculate your course grade when homework, quizzes and exams each count for a set percentage, with a warning when your weights don't add up to 100%.
Test Score Calculator
Turn questions right or wrong into a percentage and a letter grade, and get a full grading chart showing the score for every number of mistakes.
Attendance Percentage Calculator
Work out your attendance percentage, how many classes you can still miss, or how many you must attend in a row to get back above the required minimum.
Typing Speed Test
Free typing speed test with live WPM, accuracy and character-by-character feedback. Choose 15 seconds to 5 minutes and four practice passages.
Reading Time Calculator
Estimate how long a text takes to read or read aloud. Paste your text or enter a word count, set the words-per-minute speed, and get the time.
Exam Countdown Timer
Count down to every exam on your timetable at once. Add each paper with its date and time and see the days, hours and minutes left, live.
Study Planner
Turn your subjects, priorities and available hours into a day-by-day revision timetable with balanced study sessions you can copy or download.
Class Rank Calculator
Convert your class rank into a percentile and a top-percent figure, or paste the full list of scores to find your rank, quartile and decile.
APA Citation Generator
Build APA 7th edition references and in-text citations for books, journal articles, web pages, chapters and videos from the details you type in.
MLA Citation Generator
Create MLA 9th edition Works Cited entries and parenthetical in-text citations for books, articles, web pages, anthologies and videos in seconds.
Harvard Referencing Generator
Generate Harvard author-date reference list entries and in-text citations for books, journal articles, web pages and reports, with a configurable et al. rule.
Flashcard Maker
Make your own flashcard deck, study it with a shuffle-and-flip review mode that tracks what you know, and export or import the deck as JSON or CSV.
Quiz Maker
Build multiple-choice and true/false quizzes, take them in a scored practice mode with per-question feedback, and export the quiz, answer key or blank paper.
Multiplication Table Generator
Generate any times table or a full multiplication grid, with a blank worksheet mode, shuffled practice order and a clean printable file for the classroom.
Math Worksheet Generator
Create printable maths worksheets with randomised addition, subtraction, multiplication, division and fraction questions, plus a matching answer key.
Graph Paper Generator
Draw printable graph paper in your browser — square, engineering, dot, isometric or hexagonal grids at any spacing, colour and paper size, exported as PNG.
Number Line Generator
Draw a printable number line with any start, end and tick interval — integers, decimals or fractions — with marked points and open or closed interval endpoints.
Word Search Generator
Turn any word list into a printable word search puzzle with your choice of grid size and directions, plus a highlighted answer key for marking.
Cumulative GPA Calculator
Combine your prior cumulative GPA and earned credits with this term's courses to get your new overall GPA, and find the term GPA a target needs.
Grade Curve Calculator
Apply flat, top-score, square-root or bell curves to a list of class scores and compare the results side by side with the letter grade distribution.
Rubric Score Calculator
Score a weighted analytic rubric criterion by criterion, convert the result to a percentage and letter grade, and copy the finished table for feedback.
Grade Distribution Calculator
Turn a list of class scores into a letter-grade histogram with mean, median, mode, standard deviation, pass rate and the percentile rank of any score.
Degree Classification Calculator
Work out your UK degree classification from module marks weighted by credits and year, with editable boundaries and borderline detection for a First or 2:1.
GCSE Grade Converter
Convert GCSE grades between the 9-1 numeric scale and the old A*-G letters using Ofqual's published anchor points, or turn a raw percentage into a grade.
ACT to SAT Score Converter
Convert between ACT and SAT scores using the official 2018 concordance tables, including section scores and the SAT range each ACT composite covers.
IELTS Band Score Calculator
Convert raw IELTS Listening and Reading scores out of 40 into band scores, then combine all four skills into your overall band with the correct rounding.
Standards-Based Grading Converter
Convert 1-4 proficiency levels into percentages and letter grades, combining repeated attempts by most recent, decaying average, mode, mean or highest.
Chicago Style Citation Generator
Build Chicago style footnotes, shortened notes, bibliography entries and author-date references for books, articles, chapters, websites and theses.
IEEE Citation Generator
Create IEEE reference entries for journal articles, conference papers, books, standards, patents and web pages, and build a numbered reference list.
Vancouver Citation Generator
Generate Vancouver and ICMJE numbered references for journal articles, books, chapters and web pages, with the correct author, page and date punctuation.
BibTeX Generator
Create BibTeX entries with an auto-generated citation key and escaped LaTeX characters, or paste existing BibTeX to read it back as a sorted reference list.
Certificate Maker
Design and print award certificates with a border, seal, signature rules and bulk names, exported as a vector PDF or PNG straight from your browser.
Lesson Plan Generator
Fill in a gradual release, 5E, Madeline Hunter or starter-main-plenary lesson plan, watch the timings total up, and export it as Markdown, text or PDF.
Report Card Generator
Paste a subject, grade and comment list to build a printable report card with letter grades, an average, a GPA, attendance figures and signature lines.
Cornell Notes Template Generator
Build a Cornell note-taking sheet at true proportions — 2.5 inch cue column, 2 inch summary bar and adjustable rules — and download it as a print-ready PDF.
Printable Lined Paper Generator
Print wide ruled, college ruled, narrow or primary three-line paper at true spacing, with margin lines, hole-punch marks and your own line colour.
Handwriting Practice Sheet Generator
Make tracing worksheets with dashed letters over four-line handwriting guides — any word, the alphabet or your own list — and print them as a PDF or PNG.
Hundreds Chart Generator
Print a 1 to 100 number chart or any custom range, shade multiples for skip counting, and blank out cells for fill-in practice with a matching answer key.
Crossword Puzzle Generator
Turn your own words and clues into an interlocking crossword with numbered squares, Across and Down clue lists and a solution page, ready to print.
Spelling Test Generator
Turn a spelling list into a numbered answer sheet, a look-cover-write-check grid, a shuffled dictation order for the teacher and a matching answer key.
Seating Chart Generator
Shuffle your class into rows, pairs, groups of four or a horseshoe, keeping named students apart and others at the front, then print the plan.
Class Timetable Generator
Build a weekly class timetable with real period times, breaks and lunch, colour-coded subjects and a 5, 6 or 7 day week, exported as PDF, PNG or CSV.
Attendance Sheet Generator
Print a class attendance register for any month or date range, skip weekends and holidays, and mark present, absent or late with live totals and a CSV export.
Syllabus Generator
Build a course syllabus with weighted assessment, an auto-generated weekly schedule and policy sections, then export it as a PDF or Markdown file.
Bloom's Taxonomy Question Generator
Generate questions for all six revised Bloom levels from one topic, using a fixed stem bank and a repeatable seed, then print a worksheet with answer space.
Learning Objective Generator
Write measurable learning objectives in ABCD or SMART form, with a verb checker that flags “understand” and “know” and suggests observable replacements.
Parent-Teacher Conference Scheduler
Turn a class list into timed conference slots across one or more evenings, keep siblings together, flag anyone left over and export CSV or a calendar file.
Bell Schedule Generator
Build a school bell schedule from period lengths, passing time, homeroom and lunch waves, then generate delayed-start, early-release and assembly variants.
Fraction Strips Generator
Print fraction bars, circles or number lines for halves through twelfths, all drawn to one common width so equivalent fractions line up exactly.
Music Staff Paper Generator
Print blank manuscript paper with treble, bass, grand, alto or tenor clefs, key and time signatures, barlines and guitar or bass tab staves.
Spaced Repetition Schedule Generator
Turn a topic list into a dated revision calendar using the SM-2 algorithm, with per-topic ease factors, a daily load chart and a calendar file export.
SAT & ACT Superscore Calculator
Combine your best SAT or ACT section scores across every test date, see which sitting each one came from, and compare it with your best single sitting.
ECTS Credit Converter
Convert between ECTS credits, US semester and quarter credits and UK CATS points using ratios you control, plus study hours and an editable grade table.
Reading Level Converter
Cross-reference Lexile measures, US grade levels, Guided Reading letters, DRA numbers and ATOS book levels, returning a band rather than a single number.
Grading Scale Chart Generator
Print the score chart for any number of questions: every possible number wrong with its percentage and letter grade, plus curve and rounding rules.
Network & IP Tools
Subnet Calculator
Calculate network address, broadcast, usable host range and subnet mask from any IPv4 address and CIDR prefix. Free, instant and 100% in your browser.
CIDR to IP Range Converter
Convert CIDR notation like 192.168.1.0/26 into its first and last IP address and total address count. Handles many blocks at once, free and in-browser.
IP Range to CIDR Converter
Convert any start–end IP range into the smallest possible set of CIDR blocks. Ideal for firewall rules and route summaries — free and fully in-browser.
VLSM Subnet Calculator
Plan variable-length subnets from one parent network and a list of host requirements. Largest-first allocation with masks, ranges and waste — in-browser.
Subnet Mask Converter
Convert between CIDR prefix, dotted subnet mask, wildcard mask, hex and binary — with a full /0–/32 reference table. Free and 100% in your browser.
Wildcard Mask Calculator
Convert a subnet mask or CIDR prefix to a Cisco wildcard mask and back, with a ready-to-paste ACL line and binary view. Free, private, in-browser.
IP to Binary Converter
Convert IPv4 and IPv6 addresses to binary with a per-octet bit table, and turn 32-bit binary back into an IP. Free, instant and fully in your browser.
IP to Decimal Converter
Convert an IPv4 address to its 32-bit decimal, hex and octal forms and back, with the positional math shown step by step. Free and fully in-browser.
IP in Subnet Checker
Check whether IP addresses fall inside one or more CIDR subnets. Batch-check whole lists with a per-IP match table — free, private and in-browser.
IP Address Validator
Validate lists of IPv4, IPv6 and CIDR entries with the exact failure reason per line — compressed ::, IPv4-mapped forms and prefixes included. Free.
Private IP Address Checker
Check if an IPv4 or IPv6 address is private, loopback, link-local, CGNAT or otherwise special — with the matching RFC and public-routability verdict.
CIDR to IP List Generator
Expand a CIDR block into a downloadable list of every IP address it contains, up to /16. Include or exclude network and broadcast — free and in-browser.
IP Address Sorter
Sort IPv4 and IPv6 address lists in true numeric order — not alphabetical — with de-duplication and invalid-line reporting. Free and 100% in-browser.
IPv6 Subnet Calculator
Calculate IPv6 subnets online: network prefix, first and last address, total addresses and expanded/compressed forms for any /0–/128 prefix. 100% in-browser.
IPv6 Expander & Compressor
Expand a compressed IPv6 address to its full 8-group form, or compress it to the RFC 5952 canonical short form — instantly and 100% in your browser.
IPv4 to IPv6 Converter
Convert an IPv4 address to its IPv4-mapped (::ffff:), IPv4-compatible and 6to4 IPv6 forms — or extract the IPv4 hidden inside an IPv6 address. Free and private.
CIDR Aggregator
Aggregate a list of IPs and CIDR blocks into the minimal covering set. Merges overlapping and adjacent IPv4 ranges into clean summary routes — 100% offline.
MAC Address Formatter
Convert MAC addresses between colon, hyphen, Cisco dotted and bare-hex notation in bulk, with case control and U/L + multicast bit decoding. 100% in-browser.
PTR Record Generator
Build reverse-DNS PTR records for IPv4 and IPv6: in-addr.arpa and ip6.arpa names plus the ready-to-paste zone-file line. Pure formatting, no lookups.
SPF Record Generator
Create a valid SPF TXT record from your sending IPs, includes and mail servers — with live DNS-lookup counting against the 10-lookup limit. Free and private.
DMARC Record Generator
Generate a DMARC TXT record with policy, subdomain policy, pct, rua/ruf reporting and alignment options — each tag explained in plain English. 100% in-browser.
DNS Record Generator
Generate correctly formatted zone-file lines for A, AAAA, CNAME, MX, TXT, NS, SRV and CAA records — with FQDN dots, priorities and TXT chunking handled for you.
Port Number Lookup
Look up what a TCP or UDP port is used for — search 150+ common well-known and registered ports by number, service name or protocol. Instant and offline.
Download Time Calculator
Calculate how long a download takes from file size and connection speed, with correct Mbps vs MB/s handling, overhead allowance and the speed you need.
Subnet Splitter
Split any IPv4 CIDR block into equal-sized subnets by new prefix length or subnet count, with network, broadcast, host range and CSV export.
CIDR Overlap Checker
Paste a list of IPv4 or IPv6 CIDR blocks and instantly see which ones overlap, which contain another, which are duplicates and where the gaps are.
Subnetting Practice Questions Generator
Generate unlimited CCNA-style subnetting practice questions with a seeded worksheet and a full answer key that shows the binary AND working.
EUI-64 Calculator
Convert a 48-bit MAC address to its modified EUI-64 IPv6 interface identifier and link-local address, or work backwards from an IPv6 address to the MAC.
IPv6 Address Compressor
Shorten any IPv6 address to its canonical RFC 5952 form, see the fully expanded version beside it, and compress a whole list at once.
IPv6 to IPv4 Converter
Pull the IPv4 address out of an IPv6 address and name the mechanism — IPv4-mapped, 6to4, Teredo, NAT64, ISATAP — or explain when there is none.
IPv6 ULA Generator
Generate a random RFC 4193 unique local IPv6 prefix (fd00::/8) with a 40-bit global ID, plus a table of /64 subnets ready to assign.
DHCP Scope Calculator
Plan a DHCP scope from a subnet: pool start and end, exclusions, lease count, T1/T2 renewal timers and ready-to-paste dhcpd.conf and netsh config.
MTU and MSS Calculator
Work out the TCP MSS for any path MTU, subtract PPPoE, GRE, IPsec, VXLAN or WireGuard overhead, and get the exact clamp value to configure.
TCP Window Size Calculator
Calculate the bandwidth-delay product, the receive window needed to saturate a link, the TCP window scale factor and the throughput a given window allows.
IPv4 Header Decoder
Paste an IPv4 header hex dump and decode every field — version, IHL, DSCP, flags, TTL, protocol — and recompute the header checksum to verify it.
TCP Header Decoder
Decode a TCP header hex dump: ports, sequence and ack numbers, all nine flag bits, window size, and every option including MSS, SACK and timestamps.
DNS Zone File Generator
Build a complete BIND zone file online: $ORIGIN, $TTL, a full SOA record with date-based serial, plus NS, A, AAAA, CNAME, MX, TXT and SRV rows.
DNS Zone File Parser
Paste a BIND zone file and see every record normalised to a full name with its effective TTL, plus duplicate, CNAME-clash and missing-dot warnings.
DKIM Record Generator
Generate a DKIM TXT record from your public key, or create a fresh 2048-bit RSA key pair in the browser. Output as one flat line and as BIND chunks.
MTA-STS Policy Generator
Generate both halves of RFC 8461 MTA-STS: the mta-sts.txt policy file with mode, mx and max_age, plus the _mta-sts TXT record with a fresh id.
BIMI Record Generator
Build the default._bimi TXT record for Brand Indicators for Message Identification, with URL checks for your SVG logo and Verified Mark Certificate.
TLSA Record Generator
Paste a certificate and get its DANE TLSA record: pick usage, selector and matching type, and the SHA-256 or SHA-512 hash is computed in your browser.
Email Header Analyzer
Paste raw email headers to trace the delivery path hop by hop, see where mail stalled, and read the SPF, DKIM and DMARC verdicts — all offline.
SMTP Status Code Lookup
Look up any SMTP reply code and decode RFC 3463 enhanced status codes like 5.7.1 field by field into class, subject and detail meanings.
IP Blocklist Generator
Turn a list of IPs and CIDR ranges into nginx, Apache, iptables, ufw, netsh or plain CIDR rules, with duplicates removed and ranges merged.
DSCP to ToS Converter
Convert between DSCP values, the legacy ToS byte, IP Precedence and PHB names like EF, AF31 and CS5, in decimal, hex and binary side by side.
VoIP Bandwidth Calculator
Work out VoIP bandwidth per call for G.711, G.729, Opus and more, including RTP/UDP/IP, Ethernet, PPP and IPsec overhead, with and without cRTP.
WiFi Channel to Frequency Converter
Convert WiFi channel numbers to centre frequencies and back for 2.4, 5 and 6 GHz, with band, DFS status, channel width spans and 2.4 GHz overlap.
Science & Engineering Calculators
Ohm's Law Calculator
Solve Ohm's law online: enter any two of voltage, current, resistance or power and get the other two instantly, with mV, mA, kΩ and kW unit prefixes.
Resistor Color Code Calculator
Decode 3, 4, 5 and 6-band resistor color codes to resistance and tolerance, or convert a resistance value back into band colors. Free and instant.
LED Resistor Calculator
Calculate the series resistor for any LED from supply voltage, forward voltage and current. Get the nearest E12/E24 standard value and required wattage.
Parallel & Series Resistor Calculator
Calculate total resistance of resistors in parallel or series with unlimited values. Also works for capacitors, where the series/parallel rules invert.
Voltage Divider Calculator
Solve the voltage divider equation Vout = Vin·R2/(R1+R2) for output voltage or a missing resistor, with divider current, power and loaded-output mode.
Wire Gauge (AWG) Calculator
Look up AWG wire sizes 4/0 to 40 — diameter, cross-section and ohms per 1000 ft — and calculate voltage drop for copper or aluminium runs.
Force Calculator
Solve Newton's second law F = ma for force, mass or acceleration, plus weight W = mg on Earth, Moon and Mars, with newtons and pounds-force output.
Acceleration Calculator
Solve the SUVAT kinematic equations online. Enter any three of displacement, initial and final velocity, acceleration and time to find the other two.
Kinetic Energy Calculator
Calculate kinetic energy from mass and velocity with KE = ½mv², or solve for mass or speed. Results in joules, kilojoules, calories and foot-pounds.
Potential Energy Calculator
Calculate gravitational potential energy PE = mgh or elastic spring energy ½kx², solving for any variable, with gravity presets and unit conversion.
Momentum Calculator
Calculate momentum p = mv, impulse J = FΔt, and solve 1D elastic or perfectly inelastic collisions from conservation of momentum, all in your browser.
Projectile Motion Calculator
Compute time of flight, maximum height, range and impact velocity for a projectile, and see the trajectory plotted on an interactive canvas graph.
Molar Mass Calculator
Work out the molar mass of any chemical formula in g/mol, with a per-element breakdown. Handles brackets, hydrates and a grams-to-moles converter.
Molarity Calculator
Solve M = mol/L for molarity, moles, volume or mass of solute. Enter grams with a molar mass or a chemical formula and get the concentration instantly.
Dilution Calculator
Solve C1V1 = C2V2 for any missing term and see how much solvent to add. Works in molarity, percent, ppm and mg/mL with metric and US volumes.
pH Calculator
Convert between pH, pOH, [H+] and [OH-], or find the pH of a weak acid or base from its Ka, Kb and concentration. Shows every step of the working.
Percent Yield Calculator
Calculate percent yield from actual and theoretical yield, or solve for either one. Includes a grams-to-moles helper and an explanation of yields over 100%.
Percent Composition Calculator
Find the mass percent of every element in a chemical formula. Enter a compound and get the full composition table plus grams per element in any sample size.
Chemical Equation Balancer
Balance any chemical equation automatically. Enter reactants and products and get the smallest whole-number coefficients plus an atom-by-atom check.
Ideal Gas Law Calculator
Solve PV = nRT for pressure, volume, moles or temperature, plus combined, Boyle's and Charles's law modes with atm, kPa, bar, psi and mmHg units.
Half Life Calculator
Solve N = N0(1/2)^(t/t½) for remaining amount, elapsed time, half-life or starting amount, with decay constant, mean lifetime and isotope presets.
Density Calculator
Solve density = mass / volume for any variable in g/cm³, kg/m³ or lb/ft³, with specific gravity and a reference table of common material densities.
Interactive Periodic Table
Explore all 118 elements in the standard layout. Click any element for its atomic weight, group, period, block, electron configuration and state.
Punnett Square Calculator
Build monohybrid and dihybrid Punnett squares from two parent genotypes and get the genotype and phenotype ratios with percentages for every outcome.
DNA to RNA Converter
Transcribe DNA to mRNA, get the complement and reverse complement, translate codons to protein and see GC content — all in your browser.
Work and Power Calculator
Solve W = F·d·cos θ and P = W ÷ t for work, force, distance, angle, power or time, with newton, foot, joule, kWh and horsepower units built in.
Torque Calculator
Work out torque, force, lever arm or angle from τ = r·F·sin θ in N·m, lb·ft, lb·in or kgf·m, and turn torque plus rpm into shaft power.
Centripetal Force Calculator
Solve F = mv² ÷ r for force, mass, speed or radius, with speed entered directly or from a period or rpm, plus g-force and banking angle.
Friction Force Calculator
Find static and kinetic friction from f = μN on flat ground or an incline, with a surface table, a will-it-slip test and the resulting acceleration.
Hooke's Law Calculator
Solve F = kx for force, spring constant or extension, get the stored energy from U = ½kx², and combine springs in series or parallel.
Free Fall Calculator
Work out fall time, drop height or impact speed from v = √(2gh) and h = ½gt², with gravity presets for the Moon and Mars and an impact energy line.
Simple Pendulum Calculator
Find the period, length or local gravity of a simple pendulum from T = 2π√(L/g), with frequency, angular frequency and a large-amplitude correction.
Gravitational Force Calculator
Apply Newton's law of universal gravitation to find force, mass or separation, plus surface gravity and escape velocity with presets for every planet.
Elastic Collision Calculator
Work out the velocities after a head-on collision from conservation of momentum, with a restitution slider from perfectly elastic to perfectly inelastic.
Specific Heat Calculator
Solve Q = mcΔT for heat, mass, specific heat capacity or temperature change, with a 22-material table and a separate phase-change term Q = mL.
Wavelength and Frequency Calculator
Convert between wavelength and frequency using c = λf, with wave speed for vacuum, a medium, sound in air or a custom value, plus photon energy in eV.
Snell's Law Calculator
Solve n₁sin θ₁ = n₂sin θ₂ for the refracted angle or either refractive index, with a critical angle, total internal reflection warning and wave speeds.
Lens and Mirror Equation Calculator
Solve 1/f = 1/do + 1/di for focal length, object or image distance, with magnification, image height and a real, virtual, upright or inverted verdict.
Stoichiometry Calculator
Type a balanced equation, give the amount of one substance, and get moles and grams of every other reactant and product with the working shown.
Empirical Formula Calculator
Turn percent composition or measured masses into an empirical formula, then scale it to the molecular formula using the compound's molar mass.
Electron Configuration Calculator
Get the full and noble-gas electron configuration of any element or ion, with an orbital diagram, valence count and the last electron's quantum numbers.
Henderson-Hasselbalch Calculator
Work out buffer pH, pKa or the base-to-acid ratio you need, with a built-in pKa table and a warning when the buffer is working outside its useful range.
Titration Calculator
Find an unknown acid or base concentration, or the titrant volume needed, using equivalents so polyprotic acids and dibasic bases are handled correctly.
Gibbs Free Energy Calculator
Solve delta G = delta H minus T delta S for any variable, get a spontaneity verdict, the crossover temperature and the equilibrium constant both ways.
Freezing Point Depression Calculator
Calculate freezing point depression and boiling point elevation from molality, or work backwards from a measured shift to find a solute's molar mass.
PPM Calculator
Convert between ppm, ppb, mg/L, mg/kg and percent by mass with a density field, plus a molarity bridge and a C1V1 = C2V2 dilution helper.
DNA Codon Translator
Translate a DNA or mRNA sequence into protein across three or six reading frames, with start and stop codons marked and the longest ORF listed.
GC Content Calculator
Count A, C, G and T in a sequence to get GC content, AT content and the GC/AT ratio, plus primer melting temperature and a sliding-window GC profile.
Hardy-Weinberg Equilibrium Calculator
Get allele and genotype frequencies from observed counts or a known p, then test the population against Hardy-Weinberg equilibrium with a chi-square test.
555 Timer Calculator
Work out 555 astable frequency and duty cycle or monostable pulse width, and design backwards from a target frequency to E12 resistor values.
Writing Tools
Syllable Counter
Count syllables in any word, sentence or paragraph instantly, with a per-word breakdown. Great for poetry, haiku and readability. 100% in-browser.
Gunning Fog Index Calculator
Calculate the Gunning Fog Index of your text and see the grade level, complex-word list and sentence stats. Free, instant and 100% in your browser.
SMOG Readability Calculator
Calculate the SMOG grade of your text from polysyllabic words and sentence count. The standard for health content — free and 100% in-browser.
Coleman-Liau Index Calculator
Compute the Coleman-Liau readability index from letters and sentences per 100 words — no syllable guessing. Free, instant and fully in-browser.
Automated Readability Index (ARI) Calculator
Calculate the ARI of any text from characters, words and sentences, mapped to US grade level and reader age. Free, instant, 100% in-browser.
Lexical Density Calculator
Measure lexical density — content words as a share of all words — plus type-token ratio and unique word count. Free and 100% in your browser.
Sentence Length Analyzer
Analyze sentence lengths: average, median, longest, shortest and variation, with long sentences flagged in color. Free and 100% in-browser.
Adverb Counter
Find and count adverbs in your writing — -ly words plus common non-ly adverbs — with highlights and density. Free, private, 100% in-browser.
Passive Voice Checker
Detect passive voice sentence by sentence, with constructions highlighted and a passive percentage score. Free, heuristic-based, 100% in-browser.
Filler Word Finder
Find filler and hedge words like very, really, just and basically, see them highlighted, and strip them all with one click. 100% in-browser.
Transition Word Checker
Check what percentage of your sentences use transition words against the 30% guideline, with category breakdown and highlights. 100% in-browser.
Cliché Finder
Scan your writing for 100+ clichés and business jargon phrases like low-hanging fruit, with counts and in-context highlights. 100% in-browser.
Repeated Words Checker
Find words repeated too close together — plus doubled words like “the the” — with a proximity window you control. Free and 100% in-browser.
Words to Pages Converter
Convert a word count into pages (and back) for Arial, Times New Roman or Calibri at 11 or 12 pt with single, 1.5 or double spacing. Free and instant.
Speech Time Calculator
Work out how long your speech or presentation will take at slow, average or fast speaking rates — or how many words you need for a 5-minute talk.
Title Case Converter
Convert any headline to proper title case under AP, Chicago, MLA, APA or New York Times rules — real minor-word lists, not naive capitalization.
Headline Analyzer
Score any headline on length, SERP pixel width, emotional and power words, format and numbers — with a fully transparent points breakdown.
Table of Contents Generator
Paste Markdown or HTML and get a nested, linked table of contents with GitHub-style anchor slugs — output as Markdown, an HTML list or plain text.
Citation Generator
Format references in APA 7, MLA 9, Chicago, Harvard or IEEE for books, journal articles, websites and videos — manual entry, no lookups, fully private.
In-Text Citation Generator
Build parenthetical and narrative in-text citations for APA 7, MLA 9, Chicago author-date and Harvard, with correct et al. rules and page formats.
Writing Prompt Generator
Generate random story prompts from genre, character, setting, conflict and constraint banks. Lock the parts you like and reroll the rest — free and offline.
Email Signature Generator
Create a clean, professional HTML email signature for Gmail, Outlook and Apple Mail — table-based, image-free and copy-ready, with your brand colour.
Blog Title Generator
Turn one keyword into 25 ranked blog title ideas using proven headline formulas — how-to, list, question, guide and comparison — scored and sorted.
Haiku Syllable Checker
Check your haiku against the 5-7-5 syllable pattern (or tanka 5-7-5-7-7) with per-line counts and a word-by-word syllable breakdown.
Writing Goal Calculator
Turn a word-count target and deadline into a daily writing plan: words per day, a full schedule table and a projected finish date at your own pace.
Linsear Write Formula Calculator
Calculate the Linsear Write score of any text and see the US grade level, the easy and hard word counts and every step of the arithmetic. Free and instant.
LIX Readability Calculator
Calculate the LIX readability index and the companion RIX score for any text, with difficulty bands, school-year equivalents and the long words highlighted.
Fry Readability Graph
Plot your text on the Fry readability graph. Three 100-word samples are measured for syllables and sentences, then charted to read off the US grade level.
Raygor Readability Estimate
Plot your text on the Raygor readability graph. It counts words of six or more letters instead of syllables, so no syllable judgement is needed at all.
FORCAST Readability Calculator
Calculate the FORCAST readability grade for forms, checklists and technical manuals. It ignores sentence length entirely and counts single-syllable words.
Sentence Opener Analyzer
See how every sentence in your draft begins. Groups openers by first word and by pattern, and flags runs of consecutive sentences that start the same way.
Dialogue Percentage Calculator
Measure the dialogue-to-narration ratio in your manuscript. Counts quoted words and characters, breaks the result down per scene, and highlights every passage.
Paragraph Length Analyzer
Analyze paragraph lengths in your writing: words, sentences and characters per paragraph, with mean, median, standard deviation and wall-of-text warnings.
Word Cloud Generator
Make a word cloud from any text, free and online. Counts word frequency, removes stop words, sizes each word by frequency and downloads the result as a PNG.
Chapter Word Count Tracker
Split a manuscript into chapters and see the word count, page count and reading time of each, with a bar chart, outlier flags and progress against your target.
Screenplay Page Calculator
Estimate script pages and screen time from pasted screenplay text. Classifies every element and wraps it at industry widths to count the typed lines.
Story Beat Sheet Calculator
Turn a target word count or page count into the exact position of all 15 Save the Cat beats, plus three-act and four-part structure, as a copyable checklist.
Manuscript Word Count Planner
Turn a target word count and a deadline into a daily writing schedule, with days off, the pace you need and a cumulative table you can export as CSV.
Writing Streak Tracker
Log your daily word counts and track your current streak, longest streak, total words and daily average, with a 12-week heat grid and CSV export.
Words Per Page Calculator
Work out how many words fit on a page for your font, point size, line spacing, page size and margins, and convert word counts into pages or back again.
RIS to BibTeX Converter
Convert RIS reference records into BibTeX entries, or BibTeX back into RIS, with automatic citation keys, type mapping and a downloadable .bib or .ris file.
Reference List Sorter
Alphabetise a bibliography by author surname, remove duplicate references, renumber the list and re-wrap every entry with a proper hanging indent.
ISBN Validator & Converter
Validate an ISBN check digit, convert between ISBN-10 and ISBN-13, add the correct hyphens and check a whole list at once with a pass or fail column.
Book Page Count Calculator
Estimate the printed page count of your book from the word count, trim size, margins, font size and leading, with front and back matter included.
Book Spine Width Calculator
Calculate book spine width from page count and paper stock, then get the full wrap-cover canvas size with bleed in both inches and millimetres.
Book Royalty Calculator
Work out self-publishing royalties per copy for ebooks, paperbacks and hardcovers, with delivery costs, print costs and a break-even copy count.
Blog Post Outline Builder
Build an H2 and H3 outline, share a target word count across the sections by weight, and export the plan as Markdown headings, a numbered list or a table.
Email Subject Line Checker
Check where your email subject line gets cut off in Gmail, Outlook and iPhone Mail, and see which spam-trigger words, capitals and punctuation could hurt it.
Online Teleprompter
Scroll your script at an adjustable words-per-minute speed with mirror mode, full screen, a countdown and keyboard control, right in your browser.
Subtitle Reading Speed Checker
Check characters per second, words per minute, line length and gaps in any SRT or VTT file, then export retimed subtitles. Runs entirely in your browser.
Audiobook Length Calculator
Turn a manuscript word count into finished hours, studio time, narration cost and audio file size, with a chapter-by-chapter breakdown. Free and in-browser.
Translation Cost Calculator
Price a translation job from CAT match bands, with editable payable percentages, minimum charges, rush fees, DTP and proofreading, per language pair.
Resume Keyword Matcher
Compare your resume against a job description, see which keywords and phrases you cover, which are missing, and how densely each section uses them.
Standard Manuscript Formatter
Turn pasted prose into a standard manuscript format PDF — Courier 12, double spaced, one-inch margins, title page, running header and scene breaks.
Screenplay Formatter
Convert Fountain-style plain text into an industry-formatted screenplay PDF with correct margins, page breaks, (MORE) and (CONT'D), plus a page count.
Book Index Generator
Turn a list of terms and page numbers into a sorted book index with letter headings, merged page ranges, sub-entries and See / See also cross-references.
POV Consistency Checker
Split a manuscript into scenes and check the point of view in each — pronoun counts, dominant POV, filter verbs and head-hopping between viewpoint characters.
Dialogue Tag Analyzer
Analyse how your dialogue is attributed — said and asked versus exotic tags, adverb-propped tags, action beats and long runs with no attribution at all.
Oxford Comma Checker
Find every three-item list in your text, see which use the Oxford comma and which don't, and apply one-click fixes to bring a whole document to one style.
Plain English Checker
Flag bureaucratic wording, hidden verbs, long sentences and passive voice, with everyday replacements from an A–Z of over 200 plain-English alternatives.
British to American Spelling Converter
Convert text between British and American spelling in both directions, with guarded rules, an Oxford -ize mode and a full list of every change made.
Business Tools
Quotation & Estimate Generator
Create a professional quotation or estimate with line items, tax, discount and validity date, then download it as a print-ready PDF. Free, no signup.
Receipt Generator
Make an itemised payment receipt with receipt number, payment method, tax, total and change due, then download it as a PDF. Free and fully offline.
Purchase Order Generator
Create a numbered purchase order with vendor, ship-to address, delivery date, line items and terms, then export it as a professional PDF. Free and private.
Pay Stub Generator
Build a payslip template with your own earnings and deduction lines, year-to-date columns and computed net pay, exported as a PDF. Every figure is yours.
Timesheet Calculator
Add up clock-in and clock-out times minus unpaid breaks to get weekly hours in decimal and hh:mm, with overtime threshold, multiplier and gross pay.
Meeting Cost Calculator
Work out what a meeting really costs from attendee count, blended hourly rate and duration, with a live ticking counter and the annual cost if it recurs.
Burn Rate & Runway Calculator
Calculate gross burn, net burn and how many months of runway your cash buys, with optional monthly revenue and expense growth modelled month by month.
Churn Rate Calculator
Calculate customer churn, revenue churn, retention rate, net revenue retention and average customer lifetime from your start-of-period figures.
Customer Lifetime Value Calculator
Calculate LTV from ARPU, gross margin and churn, then check it against your CAC for the LTV:CAC ratio, payback period and a health band.
MRR & ARR Calculator
Normalise monthly, quarterly and annual plans into a single MRR and ARR, and break month-over-month movement into new, expansion, contraction and churn.
CPM Calculator
Solve for CPM, impressions or ad spend, then add clicks and conversions to get CTR, CPC, conversion rate and cost per conversion. Free and offline.
Employee Cost Calculator
Work out the true annual cost of an employee — salary plus payroll tax, pension, benefits, equipment and overhead — as annual, monthly and hourly figures.
Payback Period Calculator
Find how long an investment takes to pay for itself from a cash-flow series, both simple and discounted, with fractional-period interpolation and NPV.
CAC Calculator
Calculate blended and paid customer acquisition cost, the LTV:CAC ratio and CAC payback in months from your sales and marketing spend. Free and offline.
Net Revenue Retention Calculator
Calculate net revenue retention, gross revenue retention and logo retention from expansion, contraction and churn figures, plus a 12-month cohort projection.
ARPU Calculator
Calculate ARPU and ARPPU from revenue and user counts, with free-to-paid conversion and automatic monthly, quarterly and annual normalisation. Free and private.
SaaS Magic Number Calculator
Calculate the SaaS magic number from quarterly revenue and sales and marketing spend, with the standard 0.5 / 0.75 interpretation bands and implied CAC payback.
Rule of 40 Calculator
Calculate your Rule of 40 score from revenue growth plus EBITDA, free cash flow or net margin, and see exactly what it would take to reach 40.
Conversion Rate Calculator
Calculate conversion rate and analyse a multi-step funnel with step-to-step rates, drop-off counts and the traffic you would need to hit a conversion target.
ROAS Calculator
Calculate ROAS, ACOS, break-even ROAS and the maximum CPA your margin supports, plus profit after ad spend. Free, instant and fully browser-based.
A/B Test Significance Calculator
Test whether an A/B result is statistically significant with a two-proportion z-test: p-value, z-score, confidence interval and relative uplift. Free tool.
NPS Calculator
Calculate your Net Promoter Score from group totals or a full 0–10 response distribution, with a margin of error, likely range and a distribution chart.
Equity Dilution Calculator
Model a funding round on your cap table: post-money valuation, price per share, investor ownership and founder dilution, including the option pool shuffle.
Vesting Schedule Calculator
Build a share or option vesting schedule with a cliff, see exactly how much is vested on any date, and value the spread between fair market value and strike.
Business Valuation Calculator
Value a business three ways: earnings multiple, discounted cash flow with a Gordon growth terminal value, and net asset value. Compare the resulting range.
EBITDA Calculator
Calculate EBITDA from net income or operating income, add back one-off costs for adjusted EBITDA, and get the margin plus an enterprise value at any multiple.
Contribution Margin Calculator
Work out contribution margin per unit, CM ratio, break-even units and the volume needed for a target profit — with a weighted multi-product sales mix.
Working Capital Calculator
Calculate working capital, current ratio, quick ratio and the cash conversion cycle from DSO, DIO and DPO using your own balance sheet figures.
Inventory Turnover Calculator
Calculate inventory turnover from COGS and average inventory, plus days inventory outstanding, sell-through rate and GMROI, annualised from any period.
EOQ Calculator
Find the economic order quantity with EOQ = √(2DS ÷ H), plus orders per year, reorder point, order cycle length and total annual inventory cost.
Wholesale Price Calculator
Build a wholesale and retail price ladder from unit cost, with margin, markup and profit per unit at every tier plus the deepest discount you can offer.
PayPal Fee Calculator
Work out the fee and net amount on a payment, and the exact amount to charge so you receive a specific sum, using fully editable percentage and fixed rates.
Etsy Fee Calculator
Add up listing, transaction, payment processing and offsite ads fees, subtract your costs, and see net profit, margin and the break-even item price.
PTO Accrual Calculator
Project paid time off balances from an hourly, per-pay-period or annual accrual rate, with accrual caps, carry-over limits and hours-to-days conversion.
Severance Pay Calculator
Estimate a severance package from weeks per year of service, with pro-rated partial years, caps, pay in lieu of notice and accrued leave payout.
Employee Turnover Rate Calculator
Calculate turnover as separations ÷ average headcount, split into voluntary and involuntary, annualised from any period, with replacement cost.
Proforma Invoice Generator
Create a proforma invoice PDF with line items, HS codes, incoterms, discount, tax, freight, bank details and the amount written out in words.
Rent Receipt Generator
Generate rent receipts as a PDF with landlord and tenant details, period covered, amount in words and a stamp block — up to a full year in one document.
SaaS Quick Ratio Calculator
Calculate the SaaS quick ratio from new, expansion, contraction and churned MRR across several months, with net new MRR, gross churn and net retention.
Cohort Retention Calculator
Paste a cohort grid and get the retention triangle, average retention curve, month-1 and month-12 retention and the implied average customer lifetime.
Cash Conversion Cycle Calculator
Work out DIO, DSO, DPO and the cash conversion cycle from revenue, COGS and balance sheet figures, plus the cash a shorter cycle would release.
Price Elasticity of Demand Calculator
Calculate midpoint arc and point price elasticity from two price and quantity observations, classify demand and find the profit-maximising price.
Erlang C Calculator
Size a contact centre with Erlang C: offered load in erlangs, agents needed for your service level, average speed of answer, occupancy and shrinkage.
OEE Calculator
Calculate Overall Equipment Effectiveness from shift time, downtime, cycle time and piece counts, with TEEP and the six big losses broken out in minutes.
Takt Time Calculator
Calculate takt time from available production time and customer demand, then get the stations required, line balance efficiency and idle time per cycle.
Safety Stock Calculator
Calculate safety stock with the full demand and lead-time variability formula, with Z from an inverse normal, plus the reorder point and days of cover.
ABC Inventory Analysis Calculator
Paste SKUs with annual usage and unit cost to rank them by consumption value and classify them into A, B and C at editable Pareto cut-offs.
GMROI Calculator
Calculate GMROI per category from sales, COGS and average inventory at cost, with turns, sell-through, weeks of supply and a totals comparison row.
Pipeline Coverage Calculator
Weight your pipeline by stage probability and get the coverage ratio against the quota gap, plus the new pipeline needed to close it at your win rate.
Sales Quota Attainment Calculator
Work out quota attainment and pay it through a tiered commission schedule with accelerators, showing the payout per band and the effective rate on revenue.
BOM Cost Calculator
Roll up a two-level bill of materials with scrap, labour, overhead and freight to a landed unit cost, target sell price and the top cost drivers.
Credit Note Generator
Create a credit note PDF against an original invoice: line items, tax summary by rate, credit total, reason code and the balance left on the invoice.
Delivery Note Generator
Make a delivery note or packing slip PDF with ship-to and bill-to blocks, ordered versus shipped quantities, carton counts, weights and a signature block.
Statement of Account Generator
Build a customer statement PDF from a list of invoices, with open balances aged into 0-30, 31-60, 61-90 and 90+ buckets and a clear total due.
Expense Report Generator
Build an expense claim PDF with dated lines by category, mileage at your own rate, per diem with a part-day rule, reclaimable tax and a cash advance.
Tiered Pricing Calculator
Compare volume and graduated tiered pricing on one tier table: totals, blended price per unit, the crossover quantity and the margin at each tier.
Subscription Proration Calculator
Work out mid-cycle upgrade and downgrade amounts: unused credit on the old plan, prorated charge on the new one, net due today and the next renewal.
SLA Uptime Calculator
Turn an uptime target into allowed downtime per day, week, month, quarter and year, check achieved uptime, and model composite and redundant availability.
Cost Per Hire Calculator
Calculate cost per hire from itemised internal and external recruiting costs, with cost per funnel stage, time to fill, time to hire and spend against payroll.
Revenue Per Employee Calculator
Calculate revenue and profit per employee, payroll as a share of revenue, the gap to a benchmark, and the headcount a revenue target supports.
Bradford Factor Calculator
Calculate the Bradford Factor for each employee from a dated absence table, with a rolling window, editable trigger points and a ranked CSV export.
FTE Calculator
Convert staff hours into full-time equivalents, roll them up to a team total, and get pro-rata salary and pro-rata holiday for every part-time person.
Salary Increase Calculator
Work out a new salary from a percentage rise or a target figure, the real increase after inflation, mid-year pro-rata pay and multi-year compounding.
Home & DIY Calculators
Paint Calculator
Work out how much paint a room needs from its length, width and height, minus doors and windows, with coats, coverage rate and the number of cans to buy.
Concrete Calculator
Calculate concrete volume for slabs, footings, columns and round tubes in cubic yards and cubic metres, then convert it to 40, 60 or 80 lb bags or truck loads.
Tile Calculator
Calculate how many tiles and boxes you need for floors or walls from tile size, grout joint width and a waste allowance, across as many surfaces as you like.
Flooring Calculator
Add up several rooms, apply a waste allowance and divide by the coverage printed on the pack to get the boxes of laminate, vinyl, hardwood or carpet you need.
Mulch Calculator
Work out mulch volume for rectangular, circular or triangular beds in cubic yards, cubic metres and bags, and compare bagged mulch against a bulk delivery.
Gravel & Aggregate Calculator
Calculate gravel, crushed stone, sand or topsoil for a driveway or path — volume in yards and metres, weight in US tons and tonnes, and the delivered cost.
Roofing Calculator
Turn a building footprint and roof pitch into roof area, roofing squares, shingle bundles, underlayment rolls, ridge cap and starter strip with waste added.
Drywall Calculator
Work out drywall sheets for a room from wall and ceiling area, plus the joint compound, tape and screws needed, using standard trade estimating ratios.
Board Foot Calculator
Calculate board feet for a whole lumber cut list from thickness, width and length, with quantities, a cubic-metre equivalent and cost per board foot.
Fence Calculator
Turn a fence run and post spacing into post, rail, picket and panel counts, with gate openings deducted and the concrete needed for every post hole.
Wallpaper Calculator
Calculate wallpaper rolls from room size, roll width and length, and pattern repeat — with pattern matching, trim allowance and the real waste percentage shown.
BTU Calculator
Estimate the BTU per hour a room needs for heating and cooling from its size, ceiling height, insulation, sun exposure and climate zone, with kW and AC tonnage.
Stair Calculator
Work out riser height, tread depth, total run and stringer length from a total rise, and check the result against US, UK and Australian stair code limits.
Electricity Cost Calculator
Calculate what appliances cost to run: enter watts, hours per day and days per week to get kWh and cost per day, month and year, for a whole list of devices.
Deck Calculator
Work out decking boards, joists, beams, posts, railing and screws from your deck size, board width and joist spacing, with waste, board feet and cost.
Brick Calculator
Calculate how many bricks or blocks a wall needs from its size and the unit dimensions, with mortar joints, door and window deductions, waste and mortar volume.
Mortar Calculator
Calculate bags of mortar mix from a brick or block count or from wall dimensions, plus cement, lime and sand volumes for ASTM type N, S, M and O mixes.
Paver Calculator
Calculate how many pavers a patio needs plus base gravel, bedding sand, edge restraint and polymeric sand, with pattern waste for herringbone and running bond.
Rebar Calculator
Calculate slab rebar: bars each way from your spacing, lap splices at 40 bar diameters, total linear feet, tie intersections and weight from the ASTM bar table.
Asphalt Calculator
Calculate asphalt tonnage for a driveway from area, compacted thickness and density, for rectangular, L-shaped and circular areas, with cubic yards and cost.
Insulation Calculator
Work out insulation batts or blown-in bags from wall or attic area, deduct the framing, and check the R-value your thickness achieves against a target.
Siding Calculator
Calculate siding squares and boxes from wall perimeter, height and gables, less doors and windows, plus starter strip, J-channel, corner posts and soffit.
Baseboard & Trim Calculator
Work out baseboard, crown, chair rail and shoe moulding from room size or perimeter, less doorways, converted into stock lengths with waste, joints and mitres.
Wall Framing Calculator
Count studs, corner and T studs, kings, jacks and cripples, plate and header lengths and board feet from your wall length, stud spacing and openings.
Retaining Wall Calculator
Calculate retaining wall blocks per course and total courses including the buried base, plus cap blocks, pallets, base gravel, drainage stone and backfill.
Sod Calculator
Add up an irregular lawn from rectangles, circles and triangles, then convert it into sod slabs, rolls and pallets with a waste allowance and cost per pallet.
Grass Seed Calculator
Calculate grass seed from lawn area and grass type using published new-lawn and overseeding rates, plus the starter fertiliser to hit a target nitrogen rate.
Solar Panel Calculator
Work out the solar system size, panel count, roof area and annual kWh your home needs from your daily use and peak sun hours, then see the simple payback.
Generator Size Calculator
Add up running and starting watts for the appliances you want to back up, then size a generator in watts, kW and kVA and estimate runtime on one tank of fuel.
LED Savings Calculator
Compare old bulbs with LEDs on energy, cost and lifespan. See annual kWh, yearly saving, payback in months and how many replacement bulbs you avoid buying.
Natural Gas Cost Calculator
Convert therms, CCF, cubic metres and kWh of gas, apply flat or tiered rates with a standing charge and tax, and price the cost of running a gas appliance.
Water Bill Calculator
Price a metered water bill with tiered rate blocks, a sewer charge, fixed fee and tax, then see the effective cost per unit and what using less would save.
Firewood Calculator
Convert a firewood stack into full cords, face cords and cubic metres, work out the price per cord, and compare its heat value against gas and electric heating.
Pool Volume Calculator
Calculate swimming pool volume in gallons and litres for rectangular, round, oval and kidney pools, plus fill time, pump turnover and chemical dose scaling.
Cooking Measurement Converter
Convert cups, tablespoons, teaspoons, fluid ounces, millilitres, grams and ounces for flour, sugar, butter and more, with US, metric and imperial cup sizes.
Recipe Scaler
Paste an ingredient list and scale every quantity to a new serving count. Handles mixed numbers and fractions like 1 1/2 and ¾, with tidy fraction output.
Baking Pan Conversion Calculator
Swap one baking pan for another safely. Compare areas and batter volumes for round, square, rectangular, loaf and bundt pans and get the recipe multiplier.
Roast Cooking Time Calculator
Work out roasting time by weight for turkey, chicken, beef, pork, lamb and ham, with resting time, target internal temperature and a start time to aim for.
Coffee to Water Ratio Calculator
Solve any two of coffee dose, water and brew ratio, with presets for pour-over, drip, French press, AeroPress, espresso and cold brew, in grams, ml or fl oz.
Crown Molding Calculator
Total your crown molding run from a list of wall lengths, get the sticks to buy with a cutting plan, and read the exact compound miter and bevel saw settings.
Countertop Calculator
Add up countertop square footage from straight, L and U runs plus islands, subtract sink and cooktop cut-outs, add backsplash, and cost material, edge and seams.
Carpet Calculator
Lay a room out against a 12 ft, 15 ft or 3.66 m roll to get drops, seam positions, running feet and true square yards, plus underlay, gripper and total cost.
Gutter Calculator
Total your gutter run from eave lengths, size 5 and 6 inch K-style or half-round against roof area and rainfall, and count downspouts, hangers, elbows and corners.
Attic Ventilation Calculator
Work out the net free area your attic needs under the 1:300 or 1:150 rule, split it between intake and exhaust, and convert it into soffit, ridge, box or gable vents.
Lawn Fertilizer Calculator
Work out how much fertiliser your lawn needs from the N-P-K analysis and a target nitrogen rate, with bag counts, spreader calibration and an annual programme total.
Pool Chemical Calculator
Dose chlorine, pH, alkalinity, calcium, stabiliser and salt from your test results and pool volume, and check water balance with the Langelier Saturation Index.
Raised Bed Soil Calculator
Work out how much soil your raised beds need in cubic feet, cubic yards, litres and bags, then split it by mix ratio into compost, peat or coir and vermiculite.
Rainwater Harvesting Calculator
Estimate rainwater harvest from roof area and monthly rainfall, run a month-by-month tank balance, and size storage for a dry spell at your daily demand.
Sprinkler Run Time Calculator
Work out sprinkler precipitation rate from head spacing and flow, then get run minutes per zone with a cycle-and-soak schedule matched to your soil and slope.
Water Heater Size Calculator
Size a water heater from your peak-hour fixture use: tank first-hour rating and recovery, or tankless GPM at your design temperature rise, with a pass or fail verdict.
Curtain Fabric Calculator
Work out curtain fabric from track width, drop and fullness: number of widths, cut length rounded to whole pattern repeats, lining yardage and total cost.
Social Media Tools
Twitter (X) Character Counter
Count characters the way X (Twitter) actually counts them: every link counts as 23, CJK and emoji count as 2. Live remaining count, fully in-browser.
Twitter Thread Splitter
Split long text into a numbered X (Twitter) thread. Breaks at sentence and word boundaries under the weighted 280 limit, with per-tweet copy buttons.
Hashtag Generator
Turn phrases and keywords into clean hashtags: CamelCase, lowercase, per-word and combined variants, with an Instagram-safe 30-tag cap. Runs in your browser.
Hashtag and Mention Extractor
Extract all #hashtags and @mentions from pasted posts or captions. Deduplicates, counts frequency and exports each list separately — 100% in-browser.
Instagram Line Break Generator
Add line breaks that actually survive Instagram captions and bios. Cleans trailing spaces and fills blank lines with an invisible character. Free, in-browser.
WhatsApp Text Formatter
Format WhatsApp messages with bold, italic, strikethrough and monospace. Select text, click a style, and preview exactly how the message will render.
Discord Text Formatter
Build Discord markdown — bold, italic, underline, spoilers, quotes — plus colored text with ANSI code blocks. Live preview and copy-ready output.
Discord Timestamp Generator
Turn any date and time into Discord timestamp tags that show in each reader's own timezone — all seven formats previewed live with copy buttons.
YouTube Chapter Timestamp Generator
Build a YouTube chapter list from titles and durations — start times are added up for you and checked against YouTube's chapter rules before you copy.
YouTube Description Generator
Assemble a complete YouTube description from structured fields — hook, chapters, links, hashtags, disclosure — with the 5,000-character limit tracked live.
YouTube Tag Generator
Generate a YouTube tag list from your title and keywords: phrases, word combinations and variants packed to fit the 500-character tag budget. Free, offline.
Engagement Rate Calculator
Calculate social media engagement rate three ways — by followers, reach and impressions — from likes, comments, shares and saves, with reference benchmarks.
Invisible Character Generator
Copy invisible characters — Braille blank, Hangul filler, zero-width space and more — one or many at a time, with notes on where each blank character works.
Slack Text Formatter
Convert Markdown to Slack mrkdwn and back. Escapes the ampersand and angle brackets first, previews in Slack styling and tracks message limits.
Reddit Text Formatter
Format Reddit posts and comments with buttons for bold, spoilers, superscript, tables and code blocks, with a live preview and a character count.
Telegram MarkdownV2 Escaper
Escape the 18 characters Telegram MarkdownV2 reserves and fix the Bot API can't parse entities error, or switch the message to HTML parse mode.
Discord Embed Generator
Build Discord webhook embed JSON with a live preview: title, colour, author, fields, images, footer and timestamp, with every character limit checked.
Discord Permissions Calculator
Tick Discord permissions to build the bitfield integer, decode a pasted value back into flags, and generate the OAuth2 bot invite URL in your browser.
Social Media Character Counter
Count one post against every social media character limit at once — X, Instagram, LinkedIn, Facebook, TikTok, YouTube, Pinterest, Threads and Bluesky.
SMS Character Counter
Count SMS characters the way carriers bill them: GSM-7 or UCS-2 encoding, 160/153 and 70/67 segment maths, plus an estimate of what a send costs.
WhatsApp Link Generator
Create a wa.me click-to-chat link with a prefilled message, plus HTML and Markdown snippets and a downloadable QR code, all built in your browser.
WhatsApp Chat Analyzer
Analyse an exported WhatsApp chat in your browser: per-person message counts, hourly and weekday activity, emoji, media tallies and longest reply gaps.
YouTube Embed Code Generator
Generate a YouTube iframe embed with start and end times, autoplay, loop, privacy-enhanced mode and a responsive aspect-ratio wrapper for any page.
Flag Emoji Generator
Turn ISO 3166-1 country codes into flag emoji, decode flags back into codes, or browse and copy every country flag with its Unicode code points.
Social Share Link Generator
Build share URLs for X, Facebook, LinkedIn, WhatsApp, Telegram, Reddit, Pinterest, Tumblr, Bluesky and email, plus ready-to-paste HTML buttons.
Emoji Shortcode Converter
Convert colon-wrapped shortcode names to emoji and emoji back to shortcodes, using the naming convention Slack, Discord and GitHub all share.
YouTube Revenue Calculator
Estimate YouTube ad income from your own RPM or CPM, with separate long-form and Shorts figures and the 55/45 creator split shown in full.
YouTube Monetization Requirements Checker
Check subscribers, watch hours and Shorts views against both YouTube Partner Program routes, see the exact shortfall and a days-to-eligibility projection.
CPC Calculator
Work out cost per click, total spend or clicks from any two of the three, plus CTR, CPM, conversions, cost per conversion and ROAS in one view.
Influencer Rate Calculator
Build a sponsored-post rate from followers, a base CPM, your engagement rate against a platform benchmark, content type and usage rights, as a low-mid-high range.
Follower Growth Rate Calculator
Calculate follower growth rate, average gain per day, week and month, the compound periodic rate, doubling time and the date you hit your target.
Share of Voice Calculator
Calculate share of voice across any competitor set — mentions, impressions, ad spend or followers — with a bar chart, the gap to the leader and a concentration index.
Conversion Funnel Calculator
Enter funnel stages as counts or step rates to see conversion and drop-off per step, the end-to-end rate, value per stage and the traffic a target needs.
Spintax Generator
Parse nested spintax, get the exact unique variation count, list every version or generate random unique spins, and merge existing variants back into spintax.
Link in Bio Page Generator
Build a self-contained link-in-bio page: avatar, bio, styled buttons, an icon row, theme colour and dark mode, all inlined into one downloadable HTML file.
Social Media Content Calendar Generator
Turn a start date, weekly cadence, posting times, platforms and a topic list into a dated schedule with a month grid, CSV export and a downloadable .ics file.
Caption & Hashtag Splitter
Separate a caption from its hashtag block, normalise and deduplicate the tags, cap them at the platform limit and build a padded first-comment block.
Giveaway Comment Picker
Pick giveaway winners from a pasted comment list with keyword and tag-a-friend rules, bonus entries, a crypto-random Fisher-Yates draw and named alternates.
TikTok Money Calculator
Estimate TikTok income from Creator Rewards, gifts and brand deals using your own RPM, qualified-view share and diamond rate, with monthly and annual totals.
Twitch Revenue Calculator
Work out Twitch streaming income from subscriptions by tier, bits, ad revenue and tips, with your split applied and the platform's cut shown in full.
Patreon Earnings Calculator
See what you really keep from Patreon after the platform fee, payment processing, micro-pledge rates, payout fees and declined cards, per month and per patron.
Podcast Ad Revenue Calculator
Estimate podcast sponsorship income from downloads, pre-roll, mid-roll and post-roll CPMs and fill rates, with host-read versus programmatic blending and a network cut.
Spotify Royalty Calculator
Convert Spotify streams into real take-home pay after the distributor cut, label split and publishing share, and solve backwards for the streams a revenue goal needs.
Email Marketing Metrics Calculator
Calculate delivery, open, click-through, click-to-open, unsubscribe, bounce and complaint rates plus revenue per email and annualised list churn from one campaign.
Break-Even ROAS Calculator
Find the ROAS your ads must hit to break even, the target ROAS for a profit goal, your maximum CPA, and convert between ROAS and ACoS for Amazon Ads.
Reach and Frequency Calculator
Solve impressions, reach or frequency from the other two, with reach percentage, GRPs, plan cost, days to effective frequency and impressions wasted above a cap.
Ad Budget Pacing Calculator
Check whether a campaign is over or underspending mid-flight, project end-of-flight spend from the current run rate, and get the daily spend needed to land on budget.
Facebook Ads Budget Calculator
Work out the daily budget for a conversion goal, back-solve the clicks and impressions it needs, and check whether the ad set clears the learning phase.
YouTube CTR Calculator
Calculate YouTube click-through rate from impressions and views, find the impressions or CTR uplift a view target needs, and track watch hours against monetisation.
Viral Coefficient (K-Factor) Calculator
Compute your K-factor from invites and conversion rate, project cumulative signups cycle by cycle, and find the invite rate needed to push growth above K = 1.
Discord Server Boost Calculator
Work out the boosts needed for levels 1, 2 and 3, the monthly and annual cost with the Nitro discount applied, and how it splits across contributing members.