JWT Debugger by JWT.io, Sambego

The JWT.io debugger as a Firefox extension

Do you find yourself going to the browser's console to debug JWTs all the time? Then this extension is for you!

We took the functionality from our JWT.io website and embedded it within a Firefox extension with extra features!

NEW IN v3.1.0:
- Minor bugfixes

NEW IN v3.0.0:
- Support for ES512
- Stricter key checking for ES algorithms.

NEW in v2.1.0:
- Minimum length tooltips for HMAC secrets.
- Claim tooltips with information about them.
- Plain RSA public keys support (keys without X.509 header).

NEW IN v2.0.0:
- More algorithms, including PS and ES variants.
- Human readable tooltips for timestamps in claims.
- Automatic public-key download for JWKs (x5u, x5c, jku, jwk) and Auth0 keys.
- Firefox support (check the Firefox addons page!).
- Streamlined code for smaller size and better performance.

Features:
- Debug JWTs easily and visually.
- Support for HS256/384/512 (HMAC + SHA) signatures.
- Support for RS256/384/512 (RSA) signatures.
- Support for PS256/384 (RSA) signatures.
- Support for ES256/384 (ECDSA) signatures.
- Easily edit all JWTs from the current tab in cookies or web storage.
- Get shareable URLs for your JWTs.

Source code:
https://github.com/jsonwebtoken/jsonwebtoken.github.io

Report bugs at GitHub.

Brought to you by Auth0!