Developer Tools

Utilities for the small conversions that interrupt real work. They all run locally, so tokens, payloads, and files stay on your machine.

JSON Formatter validates and pretty-prints (or minifies) JSON with clear error messages, and CSV ⇄ JSON Converter moves data between the two with correct quoting. Base64 Encode / Decode and URL Encode / Decode handle the encodings you meet most. JWT Decoder shows a token’s header and claims with a readable expiry — and reminds you that decoding is not verifying. Regex Tester highlights matches and capture groups as you type, Unix Timestamp Converter turns epoch seconds or milliseconds into dates, and UUID Generator and Hash Generator (SHA) create random IDs and checksums for text or files.