JWT Decoder & Inspector
Paste any JWT token to decode header and payload, check exp/iat/nbf times, and spot risky settings like alg=none.
Algorithm
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Status
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Expires In
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Header
Payload
Security Checks
How to use
- Paste JWT token.
- Review header and payload.
- Check expiry and warnings.
FAQs
No. This tool decodes and inspects token structure in-browser. Signature verification needs the secret/public key.