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JWT Decoder

Decode JWT tokens online and inspect the header, payload, and signature instantly. Free JWT decoder for debugging auth — no data ever sent anywhere.

155 chars
iat → 2018-01-18T01:30:22.000Z
{
  "header": {
    "alg": "HS256",
    "typ": "JWT"
  },
  "payload": {
    "sub": "1234567890",
    "name": "John Doe",
    "iat": 1516239022
  },
  "signature": "SflKxwRJSMeKKF2Q… (not verified)"
}

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About JWT Decoder

Decode and inspect JWT tokens instantly — entirely in your browser. • Reveals the header algorithm, payload claims, and raw signature • Useful for debugging auth issues, checking expiry (exp), and reading claims • Signature is NOT verified — this tool only decodes, it does not validate • Nothing is sent to a server — your tokens stay private