JSON & JWT Toolkit

Pretty-print JSON, decode JWT payloads, compare exp/iat/nbf to local clock (no signature verify).

JSON & JWT Toolkit helps developers read and clean up JSON and inspect JWTs right in the browser. Features • Prettify and minify JSON — fix formatting or compress to one line. • Decode JWTs — split a token into header and payload so you can see claims (e.g. sub, custom fields). • Timing hints — compares exp, iat, and nbf to your computer clock to spot expiry and possible clock skew (for debugging only). Important This tool does not verify JWT signatures. Treat decoded data as untrusted unless your server validates the token. No data is sent to us; processing happens in the extension popup.