JWT Decoder
Decode and inspect JSON Web Token headers, payloads, claims, and expiry dates without verifying or transmitting keys.
Waiting for valid token...
Waiting for valid token...
How to Use JWT Decoder
Paste JWT
Paste any three-part bearer token (header.payload.signature).
Inspect Claims
View decoded Header (alg, typ) and Payload (sub, exp, iat, custom claims).
Check Expiration
See human-readable timestamp conversion for 'exp' and 'iat' fields.
Frequently Asked Questions
Does this tool verify the signature?
No. Decoding a JWT displays its readable claims. It does not verify cryptographic authenticity without secret keys.
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