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JWT Decoder

Decode a JSON Web Token in your browser and read its header and payload. The signature is not verified.

Runs in your browser Free, no sign-up

Decode is not verify

Anyone can read the middle part of a JWT. It is only Base64. This page does not check the signature, so do not trust the payload just because it decoded. A token with alg set to none has no signature at all. The token stays in your browser.