JWT Generator Online (Free, Private)
Create and sign JSON Web Tokens locally in your browser. HS256 signing with custom claims — secrets never uploaded.
JWTs carry authenticated claims between services. Generating test tokens for local development requires setting header, payload, and signing secret — but production secrets must never go to server-side generators.
Sign tab in the JWT workbench
- Edit header JSON — set alg (HS256, HS384, HS512) and typ
- Edit payload JSON — add sub, exp, roles, and custom claims
- Enter a shared secret — processed locally via Web Crypto API
- Copy the signed token or switch to Decode/Verify to inspect it
JWT structure
- Header — algorithm and token type
- Payload — claims like sub, exp, and roles
- Signature — verifies integrity with a shared secret or key