JWT Generator
Generate JWT tokens with custom payload, header, and secret key. Uses HMAC-SHA256 signing via the Web Crypto API entirely in your browser.
How to Use JWT Generator
The JWT Generator creates JSON Web Tokens with your custom payload and secret key. Enter a JSON payload with your claims (sub, name, iat, exp, etc.), provide a secret key for signing, and generate a valid HS256-signed JWT. The token is created entirely in your browser using the Web Crypto API — no data is sent to any server. Perfect for developers testing APIs, creating mock tokens for development, or learning how JWTs work. The generated token has three parts: header, payload, and signature, separated by dots.
Step-by-Step Instructions
- Enter your JSON payload with desired claims
- Provide a secret key for HMAC-SHA256 signing
- Click Generate JWT to create the token
- Copy the generated JWT for use in your application
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