JWT
eyJ...
Payload
{"sub":"123","exp":...}Developer Tools
JWT Payload Debugger — Header & Claims Viewer
Decode JWT header and payload locally in your browser (iat, exp, sub, etc.) without uploading tokens. Signature is not verified—use for inspection only.
JWTTokenDebug
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开发工具
JWT Payload Debugger
Decode JWT header and payload locally in your browser (iat, exp, sub, etc.) without uploading tokens. Signature is not verified—use for inspection only.
Header（算法与类型）
Payload（声明数据）
Use cases
- Check whether a token is expired
- Inspect user identifiers in claims
- Compare gateway vs client JWT payloads
How to use
- Paste the full JWT string
- Review decoded header and payload
- Cross-check iat/exp and business claims
Example input and output
FAQ
Is the token sent to a server?
No. Decoding runs entirely in your browser.
Does this validate signatures?
No. It Base64Url-decodes header and payload only; use a verifier tool for crypto checks.
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