Free browser tool · No signup
JWT Decoder
Read a JWT header, payload and timestamp claims locally in your browser.
Your input stays in this browser. No API calls or server uploads.
Decoded data is unverified. This tool does not verify signatures or grant access.
How to use the jwt decoder
Paste a three-part JWT to decode its JSON header and payload and inspect exp, nbf and iat timestamps.
Supported features and limitations
Decoding does not verify the signature, issuer, audience or authorization. Encrypted five-part tokens are not supported. No token is saved or uploaded by this tool.
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