Developer Tools
Encoders, generators and formatters for everyday development work.
UUID Generator
Generate random UUID v4 identifiers instantly in your browser. Create one or thousands of unique IDs, copy any of them, and download the whole list.
JSON Formatter
Format, beautify, minify and validate JSON online. Pick an indent size, catch syntax errors with the exact line number, then copy or download clean JSON.
Base64 Encode / Decode
Encode text and files to Base64 and decode Base64 back to text or files in your browser. Supports standard and URL-safe alphabets, with copy and download.
URL Encode / Decode
Percent-encode and decode URLs and query strings in your browser. Switch between encodeURIComponent and full-URI modes, then copy the result instantly.
JWT Decoder
Decode JSON Web Tokens in your browser to inspect the header and payload. See issued-at and expiry times as human dates. Signatures are not verified.
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from text or files in your browser using the Web Crypto API. Copy the hex digest with one click.
Password Generator
Create strong, random passwords in your browser with adjustable length and character sets. Uses crypto-grade randomness, shows strength, and generates in bulk.
QR Code Generator
Create QR codes from any text or URL in your browser. Adjust size and error correction, preview live, and download as a crisp PNG or scalable SVG file.
Regex Tester
Test regular expressions against your text live in the browser. Toggle flags, highlight every match and capture group, and browse a handy pattern cheatsheet.
HTML Formatter
Beautify and format minified HTML code with custom indentation.
CSS Formatter
Format and indent minified CSS code for better readability.
HTML Minifier
Compress HTML code by removing whitespace and comments.
HTML to Markdown
Convert rich HTML text into clean Markdown format.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases.
HTML Entities Encode/Decode
Encode or decode HTML entities to safely display special characters.
Crontab Helper
Generate and understand cron schedule expressions easily.
Image to ASCII Art
Convert any image into text-based ASCII art.