JWT Encoder & Token Signer

During automated testing, local development, or microservice integration, you frequently need to generate mock authentication tokens without having to spin up an entire OAuth Identity Provider.

How HMAC-SHA256 Signing Works Client-Side

We utilize the native browser window.crypto.subtle API. When you supply a secret key and click generate, the browser imports your key, constructs the base64Url encoded header and payload, and executes an HMAC digest locally.