JWT Generator
Generate and sign JSON Web Tokens for testing.
FAQ
Which signing algorithms are supported?
HS256, HS384, and HS512 (HMAC), signed with the Web Crypto API entirely in your browser. RS256/ES256 aren't supported — asymmetric signing needs a private key, which has no safe place to live in a browser-only tool.
Is my secret sent anywhere?
No. Signing happens entirely client-side — the secret and token never leave your device.