Developer Tools
Handy utilities for developers — format JSON, encode and decode Base64, hash and decode tokens, test regular expressions, convert timestamps and colors, and more. Fast, private and free.
JSON Formatter
Format and validate your JSON data
UUID Generator
Generate UUID v4, v7 and ULID in bulk
Hash Generator
MD5, SHA-1, SHA-256 and SHA-512 hashes
Base64 Encoder/Decoder
Encode and decode Base64 text instantly
Timestamp Converter
Convert Unix timestamps to readable dates
Color Converter
Convert HEX, RGB, HSL, OKLCH + contrast checker
CPF/CNPJ Validator
Validate Brazilian CPF and CNPJ numbers
Regex Tester
Test regular expressions with live match highlighting
JWT Decoder
Decode JWT header and payload safely
Markdown to HTML
Convert Markdown into clean HTML instantly