All tools
Developer Tools
Eight practical developer tools. Process text and code locally in your browser.
JSON Formatter & Validator
Format or minify nested JSON and detect invalid syntax.
Base64 Encoder & Decoder
Encode UTF-8 text as Base64 or decode strict Base64 to text.
URL Encoder & Decoder
Percent-encode a URI component or decode encoded text.
JWT Decoder
Read a JWT header and payload without verifying its signature.
UUID Generator
Generate cryptographically random version 4 UUIDs.
Unix Timestamp Converter
Convert Unix seconds or milliseconds to dates and back.
Regex Tester
Test JavaScript patterns and flags with isolated execution.
JSON ↔ YAML Converter
Convert JSON data and YAML 1.2 configuration locally.
Inputs and results stay in this browser. No account or uploads. Anonymous analytics is currently disabled.