Decoded JWT header & payload

The JSON structure inside a standard authentication JWT.

Open in JSON Formatter

About this format

JSON Web Tokens consist of three parts. The header and payload are simply Base64URL-encoded JSON strings.

Example Data

{
  "header": {
    "alg": "HS256",
    "typ": "JWT"
  },
  "payload": {
    "sub": "1234567890",
    "name": "John Doe",
    "iat": 1516239022
  }
}

When to use Decoded JWT header & payload

  • Decoding API tokens
  • Verifying user identity
  • Checking token expiration