JWT Decoder
Paste a JWT to decode its header and payload right away. Nothing gets sent anywhere, so it's safe to use on real tokens.
JWT
Header
Payload
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Frequently asked questions
Does decoding a JWT verify its signature?+
No, this tool only decodes the header and payload so you can inspect the claims. It does not verify the signature, since that requires the secret or public key.
Is it safe to paste a real JWT here?+
Yes, decoding happens entirely in your browser; the token is never sent to a server.
Why does the payload show numbers instead of dates?+
JWT timestamp claims like iat and exp are Unix timestamps (seconds since 1970). Convert them with a timestamp converter if you need a readable date.