Create a signed JSON Web Token (HS256, HS384 or HS512) from your own payload and secret, with optional issued-at and expiry.
Press “Generate JWT” to see the result.
No. The token is signed in your browser with the Web Crypto API.
No — it is only Base64-encoded, so never put secrets or passwords in it.
No. Everything is worked out in your browser and nothing you type is sent to a server.