Developer Tools
Format, decode and inspect the small things that trip up every developer.
Base64 Encode Decode – Free, In-Browser
Developer
Encode and decode Base64 for text and files, with URL-safe output and correct UTF-8 handling.
Run here No login
JSON Formatter & Validator – Free, In-Browser
Developer
Format, validate and minify JSON in your browser, with exact error locations.
Run here No login
JWT Decoder – Free, In-Browser
Developer
Decode JWT header and payload locally, read exp and iat as human dates. Signature not verified.
Run here No login
Regex Tester – Free, In-Browser
Developer
Test regular expressions live with match highlighting, capture groups and replace preview.
Run here No login
Unix Timestamp Converter – Free, In-Browser
Developer
Convert Unix seconds or milliseconds to readable dates in any timezone, and back again.
Run here No login