Free Tools

    JWT Decoder

    Decode JSON Web Tokens to inspect header, payload, and claims. Decoding only — runs entirely in your browser.

    Runs in your browser Header + payload Expiry detection

    Decoding only — never paste production tokens. Decoding happens in your browser.

    {
  "alg": "HS256",
  "typ": "JWT"
}
    {
  "sub": "1234567890",
  "name": "John Doe",
  "iat": 1516239022
}
    SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c
    Issued at
    2018-01-18T01:30:22.000Z

    What it does

    Decode any JWT

    Pastes the header, payload, and signature segments and decodes the base64url-encoded JSON for you.

    Expiry awareness

    Highlights iat, exp, and nbf claims as readable dates and flags expired or not-yet-valid tokens.

    Privacy-first

    Decoding runs in your browser. No tokens are sent to a server, logged, or stored.

    Frequently Asked Questions

    Quick answers about the JWT decoder.

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