JWT
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjMiLCJuYW1lIjoiVVVVUCIsImlhdCI6MTUxNjIzOTAyMn0.signature
Payload summary
{"sub":"123","name":"UUUP","iat":1516239022}Encoding & Decoding
JWT Decoder - Inspect Header and Payload
Decode a JWT locally to show Header, Payload, and Signature, with algorithm and expiry hints. Useful for auth debugging. The token is not uploaded.
JWTDecodeAuth
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Quick actions
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编码加解码
JWT 解码器
结构分段
粘贴 JWT 后高亮显示三段结构
状态：等待输入
Header
-
Payload
-
Signature
-
⚠️ 仅解码，不验证签名
Use cases
- Inspect token claims while debugging sessions
- Check common claims such as iat and exp
- Compare the algorithm declared in the Header
How to use
- Paste a full JWT string
- Review the decoded Header and Payload
- Copy individual decoded segments as needed
Example input and output
FAQ
Does it verify the signature?
No. It only Base64URL-decodes and displays structure locally. It does not prove the token is authentic or untampered.
How is expiry determined?
If the Payload includes exp, the page compares it with the current browser time. Without exp, expiry cannot be judged.
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