JWT
eyJhbGciOiJIUzI1N...
Output
Decoded Header + Payload + expiry
Developer Tools
JWT Decoder and Structure Cheat Sheet
Paste a JWT to decode Header and Payload with colored segments and highlight expiry and other key claims.
JWTDecodeSecurity
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开发工具
JWT Cheat Sheet
Header
-
Payload
-
Signature
-
Payload 字段说明
常见 Claim 参考
iss — 签发者sub — 主题aud — 受众exp — 过期时间nbf — 生效时间iat — 签发时间jti — JWT IDalg — 算法等待输入 JWT。
Use cases
- Debug JWT contents
- Check token expiry
- Learn JWT structure
How to use
- Paste a JWT
- Review the three decoded segments
- Read claim explanations
Example input and output
FAQ
Does it verify signatures?
No. It only decodes and displays structure. Signature verification needs a secret and belongs on the server.
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