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JW
JWT Decoder
Decode JWT header and payload locally
Runs locally in your browser; input is never uploaded
Usage
Paste a three-part JWT or Authorization: Bearer text, then run. The shared output only contains formatted Header and Payload JSON. Signature, the no-verification warning and exp/nbf/iat time details appear in diagnostics. This tool decodes but does not verify signatures.
FAQ
- 1.
Does successful decoding mean the JWT is trusted?
No. Decoding only reads Header and Payload. Trust requires signature verification with a trusted key and claim validation.
- 2.
How are exp, nbf and iat displayed?
Numeric time claims are converted to readable times in diagnostics and do not pollute the copyable JSON output.
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