JWT Decoder
Decode a JWT's header and payload without verifying the signature.
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How it works
The JWT Decoder splits a JSON Web Token into its header and payload segments, Base64URL-decodes them, and pretty-prints the resulting JSON. It does not verify the signature — use this only for inspecting token contents.
Frequently asked questions
Does this verify the token's signature?
No. This only decodes the header and payload for inspection. Signature verification requires the secret or public key and isn't performed here.