Blog
Guides and how-tos for getting the most out of every ByteTools utility.
How to Permanently Rotate PDF Pages and Save Them
Rotate PDF pages by 90, 180 or 270 degrees and save the change permanently in your browser. Free, private in-browser rotation with no upload needed.
Rotate Images Online: 90° Turns or Any Custom Angle
Fix sideways photos and straighten crooked horizons free. Rotate any image 90 degrees or by a custom angle in your browser — nothing gets cropped or uploaded.
How to Write a robots.txt File and Block AI Bots
Build a valid robots.txt with crawl rules, sitemap directives and one-click presets to block AI training crawlers like GPTBot and ClaudeBot.
How to Convert RGB to HEX Color Codes Fast
Turn RGB or RGBA values into 6- or 8-digit HEX codes instantly. Paste an rgb() string, preview the swatch and copy the result, all in-browser.
How to Reverse Text Online: Characters, Words and Lines
Reverse text online three ways: flip characters for mirror text, reverse word order, or invert line order. Free, private, works with emoji and accents.
Resize Images to Exact Dimensions Online (No Uploads)
Resize any photo to exact pixels or a percentage with aspect-ratio lock. A free, private browser image resizer for social, email and web dimensions.
How to Remove Extra Spaces and Clean Up Whitespace
Collapse double spaces, trim trailing whitespace and convert tabs to spaces in one click. Clean messy text from PDFs and OCR privately in your browser.
How to Remove Blank Lines from Text or Code Online
Strip empty and whitespace-only lines from pasted text in one click, or collapse extra gaps while keeping paragraph spacing, privately in your browser.
How to Remove Duplicate Lines from Any List Online
Delete repeated lines from lists, logs and CSV columns in one step, with case-insensitive matching and keep-first or keep-last options, all in your browser.
How to Reorder PDF Pages Online for Free
Change the order of pages in a PDF with simple up/down controls and download the reorganised file. Free, private and entirely in your browser.
How to Generate Random Strings and Words for Testing
Generate random strings with custom length and character sets, or random words from a built-in list. Free, secure, private test-data generator online.
Random Number Generator: Fair Draws & Winner Picks
Generate truly unbiased random numbers online for raffles, giveaways and sampling — with no-repeat mode, sorting and dice or coin presets. Free and private.
Random Name Generator: Test Data & Username Ideas
Generate realistic random names from diverse cultures or unique usernames online — perfect for placeholder data, QA, characters and sign-ups. Free and private.
Random Color Generator: Lock, Re-Roll and Export
Generate random color palettes, lock the swatches you love, re-roll the rest, and export as a HEX list or CSS variables, all in your browser.
How to Create a Free QR Code That Never Expires
Create QR codes for URLs, Wi-Fi, email, phone and SMS, then download a crisp PNG. No redirect service, so codes never expire. Free and private.
Product Schema: Get Price and Star Rich Snippets
Generate Product JSON-LD with a nested Offer, brand, SKU, availability and optional rating so your listings win price and star rich snippets in search.
How to Vectorize a PNG Into an SVG Online
Convert PNG to SVG by tracing pixels into scalable vector shapes. Free in-browser vectorizer for logos, icons and pixel art — private, no uploads.
How to Calculate Percentages: The Complete Guide
Learn the three percentage formulas everyone needs — percent of a number, reverse percent, and percentage change — with worked examples and a free live calculator.
How to Convert PDF Pages to PNG or JPG Images Free
Render every PDF page as a high-resolution PNG or JPG at 1x-3x scale, all in your browser with no uploads. A simple, private step-by-step guide.
How to Check PDF Metadata Before You Share a File
See the hidden author, creator, dates and properties inside any PDF privately in your browser, and learn what those fields quietly reveal about you.