JWT Decoder
Decode JWT header and payload, with exp / iat status checks
Header
Payload
Signature (verify on your server)
Tip: never paste production tokens into tools you don't trust. This page decodes locally and sends nothing.
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About this tool
Paste a JSON Web Token to instantly inspect its header, registered claims and signature. exp and iat timestamps are rendered as human-readable dates in your local timezone, with clear expired / valid / not-yet-valid badges. The token is never sent anywhere — decoding happens in your browser only.