Developer Tools
Format and validate JSON, convert Markdown to HTML, handle Base64 and percent-encoded URLs, and generate QR codes
JSON Formatter
Format, minify and validate JSON, with the exact line of any error
Base64 Encoder/Decoder
Encode text or files to Base64, decode Base64 and base64url back again
URL Encoder/Decoder
Encode a value or a whole URL, decode either, and read query parameters
Markdown to HTML Converter
Convert Markdown to clean HTML, with a live preview and GitHub extensions
HTML Entity Encoder/Decoder
Escape text into HTML entities, or decode entities back into characters
Regex Tester
Test a regular expression against your text, with live highlighting, capture groups and replace
Regex Find and Replace
Replace every match of a pattern, reusing captured groups in the replacement
JWT Decoder
Decode a JWT, read every claim in plain English and check the signature
JWT Generator
Build a token with your own claims and sign it with HMAC, RSA or ECDSA
Color Picker & Converter
Pick a color and read it back as HEX, RGB, HSL, HSV, CMYK or OKLCH
CSS Minifier
Minify CSS without rewriting your rules, or format it back to readable
UUID Generator
Generate UUIDs in any version, from random v4 to time-ordered v7
Binary & Hex Converter
Convert a number between binary, octal, decimal and hex, exact at any size
Image to Base64
Convert an image to Base64, a data URI, or a ready CSS/HTML snippet
QR Code Generator
Generate a QR code for a link, Wi-Fi, contact card or event, add your logo, and see it read back before you download
Barcode Generator
Generate an EAN, UPC, Code 128, Code 39, ITF or Codabar barcode and download it as PNG or SVG