JWT Decoder

Decode a JWT header and payload locally without claiming its signature is valid.

Decoding a JWT does not verify its signature or guarantee that the token is authentic.

Your data is processed locally in your browser.

What a decoded JWT shows

A JWT commonly contains a header, payload, and signature. The exp, iat, and nbf claims use Unix seconds and are also shown as readable dates.

Important considerations

Decoding proves neither the signature, issuer, nor authenticity. Never use decoded data for authorization without verification in a trusted environment.

Processing happens locally in your browser.

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