Decode, verify, and inspect JWTs in one panel. 100% client-side.
API developers, DevOps engineers, and QA teams use JWT Debugger daily to decode, verify, and inspect jwts in one panel. 100% client-side as part of their debugging and development workflow. When something is not working as expected, inspection tools show you the details that matter: headers, tokens, payloads, and timing information. Everything runs client-side using JavaScript. No server calls, no logging, no data retention. Close the tab and your input is gone. Works on desktop and mobile browsers. Part of the HttpStatus.com JWT tools — free, fast, and private.
The debugger combines decode and verify in one view so you can see payload and signature status together.
No. Decoding and verification run entirely in your browser.
Yes. Paste the full token; strip the 'Bearer ' prefix if the tool doesn't accept it.
Wrong key, wrong algorithm, or token was modified. Double-check you're using the issuer's public key or secret.
Common claims (sub, exp, iat, iss, aud) may have short explanations. Custom claims are shown as raw key-value.