JWT Decoder

Decode and inspect JWT tokens online for free. View header, payload and claims with readable dates, check expiry, verify HMAC signatures — locally in your browser.

Encoded JWT

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

Header

{
  "alg": "HS256",
  "typ": "JWT"
}

Payload

{
  "sub": "1234567890",
  "name": "John Doe",
  "iat": 1516239022
}

Claim	Value	Date	Relative
`iat`	`1516239022`	`2018-01-18 02:30:22`	9 years ago

Signature

SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

About JWT Decoder

Paste a JSON Web Token to instantly decode its header and payload, see registered claims like exp, iat and nbf as readable dates, and check whether the token has expired.

Optionally verify HMAC signatures (HS256/384/512) by providing the secret. Everything runs locally — tokens are never sent to a server.