Generate and sign JSON Web Tokens online. Build a custom header and payload, sign with your HS256 secret, and copy a ready-to-use JWT for testing APIs and authentication flows — all generated in your browser so secrets stay private.
Add the claims your application expects — sub, iss, exp, roles or anything custom — and the generator builds a valid token. Perfect for creating test tokens for protected endpoints during development.
Provide a shared secret and the tool signs your token with HMAC SHA-256 so it passes signature verification on your backend. Signing happens locally, so your secret is never transmitted.
Fill in the header and payload claims, enter your signing secret, and the tool produces a signed JWT you can copy and use immediately.
Tokens are signed with HS256 (HMAC SHA-256) using the secret you provide.
Yes. The token is generated and signed entirely in your browser, so the secret never leaves your device.
Paste it into the JWT Decoder to inspect the header and payload and verify the signature with your secret.