Developer Tools
Everyday developer utilities. Pretty-print JSON, decode JWTs, encode/decode Base64 and URLs, convert timestamps, and pick colors - fast and private.
6 tools available
JSON Formatter
Format, validate, and minify JSON. Catches syntax errors with line numbers. 100% browser-based.
Base64 Encoder/Decoder
Encode and decode Base64 strings in your browser. Supports UTF-8 and binary. No upload.
JWT Decoder
Decode JSON Web Tokens to view header, payload, and signature. Free, browser-based, doesn't verify.
Timestamp Converter
Convert Unix timestamps (seconds or milliseconds) to human-readable dates and back. Multiple timezones.
URL Encoder/Decoder
Encode or decode URL strings. Handles full URLs and query parameter values. 100% browser-based.
Color Picker & Converter
Pick a color visually and get its HEX, RGB, HSL, and CSS values. Free, browser-based.