Encoding

JWT Decoder

Inspect a JWT header, payload, and signature segment locally without verifying the token.

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Decoding is not verification. Signatures, claims, expiration, authenticity, and authorization are not verified.

Decoded JWT parts

Choose “Decode JWT” to see the result here.

Processed in your browser. Inputs stay in this page’s memory and are not uploaded or saved.

The signature is shown as the original encoded segment. Header and payload are formatted JSON; token text is never sent to a server.

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What does this tool do?

Inspect a JWT header, payload, and signature segment locally without verifying the token. Input: Three-part JWT input. Output: Decoded JWT parts (JWT parts).

How to use it

Enter three-part jwt input, then choose “Decode JWT”. Review the result and use Copy to copy the displayed text. Clear removes all fields and the result.