Dev tools that
punch above their weight_
10 free tools for developers. Everything runs in your browser — nothing uploaded, nothing tracked, nothing stored.
JSON Formatter
Format, validate, and minify JSON. Syntax highlighting and error detection.
Regex Tester
Test regular expressions with live matching, capture groups, and flags.
JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, and expiration.
Base64 Encode/Decode
Encode text to Base64 or decode Base64 back to text. Handles UTF-8.
Cron Parser
Parse and explain cron expressions. See next run times in human-readable format.
UUID Generator
Generate v4 UUIDs. Bulk generate, copy to clipboard, decode UUID versions.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input.
Diff Checker
Compare two texts side by side. Highlights additions, deletions, and changes.
Color Converter
Convert between HEX, RGB, HSL, and more. Live preview with copy support.
Unix Timestamp
Convert between Unix timestamps and human dates. Current time, relative dates.