JSON formatting and comparison, regex testing, REST API code generation, diffing, JWT decoding, and encoding utilities — all free, client-side, and ready to use with no signup.
Beautify or minify JSON instantly, right in your browser.
Compare two JSON documents and see what was added, removed, or changed.
Check that JSON is well-formed and get the exact line and column of any error.
Test a pattern against real text with live match highlighting, groups, and replace.
Describe an API call once — get ready-to-run code in 14 languages and frameworks.
Compare two blocks of text or code and see exactly what changed, line by line.
Decode a JWT's header and payload, and check its expiry, instantly.
Encode or decode Base64 and URL strings instantly.