JWT Generator
API & BackendSign HS256, HS384 or HS512 JSON Web Tokens from a payload and secret.
Runs entirely in your browser — nothing is uploaded
Features
- HMAC signing with SHA-256, SHA-384 or SHA-512.
- Registered-claim helpers for iss, sub, aud, exp and iat.
- Live preview of the encoded header and payload segments.
- Signing happens locally with the Web Crypto API.
How to use the JWT Generator
- 1Edit the payload and add any registered claims you need.
- 2Enter your signing secret and choose an algorithm.
- 3Copy the signed token.
Frequently asked questions
Is it safe to enter my production secret?
Signing runs entirely in your browser and the secret is never transmitted, but use a development secret wherever you can.
Can it sign RS256?
Not currently. RS256 needs an RSA private key; this tool covers the HMAC family only.