Create a signed JSON Web Token from your own payload and secret using the HS256 algorithm. A JWT packs a header and a payload into two base64url segments and appends an HMAC-SHA256 signature, so a server that shares the secret can verify the token has not been tampered with. This generator builds the standard header for you, base64url-encodes your JSON payload, and signs it with your secret using the browser native Web Crypto API, giving you a complete token you can paste into an Authorization header for testing. Pair it with the JWT decoder to inspect what you produced. Enter your payload JSON and a secret, then click generate. Everything runs in your browser, so your secret is never sent to a server.