JWT Generator & Validator

Create and verify JSON Web Tokens (JWT) with HS256 signing algorithm

JWT Generator

Signature algorithm and token type
Data to include in the token
At least 32 characters for HS256

JWT Validator

What is JSON Web Token (JWT)?

JWT is an open standard (RFC 7519) for creating access tokens based on the JSON format. It is often used for authentication and data exchange in web applications.

JWT structure

JWT consists of three parts separated by dots:

  1. Header - contains token type and signing algorithm
  2. Payload - contains data (claims)
  3. Signature - is created by signing the header and payload using a secret key

Usage example

{
    "header": {
        "alg": "HS256",
        "typ": "JWT"
    },
    "payload": {
        "sub": "1234567890",
        "name": "John Doe",
        "iat": 1784846553    }
}

Our tool allows you to create HS256-signed JWT and verify existing tokens.