$ jwt-decode
JWT Decoder
Decode a JSON Web Token to see its header, payload, and whether it has expired. Signature is not verified.
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About this JWT decoder
A JWT has three Base64URL-encoded parts separated by dots: header, payload, and signature. This tool decodes the first two so you can read the claims. It does not verify the signature — never trust a token just because it decodes. Decoding happens locally; the token is not sent anywhere.