ADVERT
JWT Token Generator
Create signed JSON Web Tokens with this free JWT token generator. Customize headers and payloads, choose HS256/384/512 HMAC algorithms, and copy the ready-to-use JWT.
How to use this tool
- Adjust the header and payload JSON to match the claims you need.
- Select an HMAC algorithm and provide a shared secret.
- Generate the token and copy it for local testing or staging environments.
Practical uses
- Mock authentication flows when developing against protected APIs.
- Generate tokens for API clients or integration tests without running auth services.
- Teach teammates how header and payload claims influence JWT behavior.
Best practices
- Never use production secrets in browser tools. Use staging keys only.
- Set short expirations in shared debug tokens.
- Store secrets in environment variables in real apps instead of hard-coding.
FAQ
- Which algorithms are supported?
- This tool supports symmetric HMAC algorithms HS256, HS384, and HS512.
- Where is signing done?
- Signing runs locally via the Web Crypto API, so your secret stays in-browser.
- Can I generate refresh tokens?
- You can craft custom JWT payloads, but many systems use opaque refresh tokens instead.
Resources
ADVERT
ADVERT