Blog
Guides and how-tos for getting the most out of every ByteTools utility.
How to Build a Color Palette From a Single Color
Learn how to turn one brand color into complementary, analogous, triadic and monochromatic palettes using color-wheel math, all in your browser.
Character Counter: Stay Within Every Platform Limit
Count characters live and check Twitter/X, Instagram, meta description and SMS limits as you write, all privately in your browser with no uploads.
How to Change Image DPI to 300 Without Losing Quality
Learn how to change an image to 300 DPI online in seconds. A lossless, browser-based method that rewrites metadata without touching a single pixel.
Case Converter Guide: Fix Capitalization in One Click
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case and more online, with a clear guide to which case style to use when.
Fix Duplicate Content with rel=canonical Tags
Learn when and how to use rel=canonical tags to consolidate duplicate URLs, and generate a correct canonical link online with URL normalization.
Generate Secure Random Bytes for Keys and Salts
Create cryptographically secure random bytes online as hex, Base64 or a binary file. A practical guide to sizing keys, salts, IVs and tokens.
How to Fix Dark Photos: Brightness & Contrast Online
Adjust image brightness and contrast online with live sliders. Brighten dark photos, tame washed-out scans and add punch, free and private in your browser.
How to Add Breadcrumb Schema to Your Pages
Build BreadcrumbList JSON-LD from simple name and URL rows so Google shows a readable trail like Home > Guides > SEO instead of a raw URL in your snippet.
Understanding Your BMI: What the Number Really Means
Calculate your Body Mass Index in metric or imperial units, learn the WHO weight categories, and see when BMI is and isn't a reliable guide.
How to Blur an Image Online for Free (No Upload)
Blur an image online with an adjustable Gaussian blur slider. Great for backgrounds, redacting screenshots and placeholders, private and free in your browser.
Binary and Bitwise Math Made Easy: A Practical Guide
Add binary numbers, run AND, OR, XOR and bit shifts, and convert between binary, decimal, hex and octal with a free browser calculator that shows every base.
Convert Base64 to an Image and Download It (Free Guide)
How to decode a Base64 string or data URL back into a viewable, downloadable image online. Instant preview, automatic format detection, fully private.
How to Base64 Encode Text and Files (UTF-8 Safe)
Learn how to Base64 encode text and files correctly in your browser, why btoa() breaks on emoji, and when to reach for URL-safe base64url output.
How to Decode Base64 to Text or a File Online
Decode any Base64 string back to readable text or the original file in your browser. Handles base64url and missing padding automatically, fully private.
How to Make Code 128 Barcodes Online (Free Guide)
Learn how to create scannable Code 128 barcodes online for shipping labels, inventory tags and asset IDs — free, private and ready to download as PNG.
AVIF Won't Open? Convert AVIF to JPG in Seconds
Can't open an AVIF file in Photoshop or Windows Photos? Convert AVIF to JPG in your browser for instant compatibility — free, private, no uploads.
Article Schema Markup for Blog Posts and News
A practical guide to generating Article, NewsArticle and BlogPosting JSON-LD with headline, author, publisher and dates so your posts shine in Search and Discover.
How to Calculate the Area of Any Common Shape
Calculate the area of a rectangle, triangle, circle, trapezoid or ellipse from simple measurements, with the formula shown, using a free browser tool.
How to Calculate Your Exact Age in Years, Months and Days
Find your precise age from your date of birth, convert it to weeks, days and hours, and check your age on any date with a free browser calculator.
How to Add Page Numbers to a PDF Online for Free
Stamp page numbers onto every PDF page with a choice of position, starting number and font size. Free, private in-browser tool with no upload needed.