๐ซJWT Debugger
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JWT (JSON Web Token) is an open standard (RFC 7519) for securely transmitting information between parties. This tool combines a decoder and generator into a single JWT debugger. You can analyze existing tokens or generate test tokens and decode them immediately.
How to Use
- 1Select a Tab
Choose 'Decoder' or 'Generator' from the tabs at the top.
- 2Decode a JWT
In the Decoder tab, paste a JWT token and the header, payload, claims, and signature are analyzed automatically.
- 3Generate a JWT
In the Generator tab, configure the algorithm, secret key, and claims to auto-generate a token.
- 4Bridge to Decoder
Click 'Decode this token' on a generated token to switch to the Decoder tab with the token pre-filled.
Tips
- ๐กJWT decoding doesn't require a secret key. The payload is encoded, not encrypted โ never put sensitive information in the payload.
- ๐กCheck the expiration (exp) claim to quickly determine if a token is still valid.
- ๐กWhen debugging API authentication errors, inspecting token claims often reveals the root cause.
- ๐กThis tool does not verify signatures. Signature verification must be done server-side with the secret key.