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🪪 JWT Decoder

Decode JWT header/payload and inspect exp/iat/nbf claims (no signature verification)

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HMAC Calculator
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Free online JWT decoder with Bearer/JWT prefix support. Decode JWT header and payload from Base64URL into readable JSON, then inspect claims like alg, typ, sub, aud, exp, iat, and nbf. Everything runs locally in your browser with no data upload. This tool is for decoding and inspection only, and does not verify JWT signatures.