What is JWT Generator?
JWT Generator allows developers to create and sign custom JSON Web Tokens (JWT) with custom header parameters, payload claims, and secret signing keys.
How to use JWT Generator
Enter header, payload claims JSON, and secret key. Click Generate JWT to output a signed token string.
Key features
- Custom JWT creation with HS256 signing
- 100% client-side operation
Common use cases
- Generating test JWT tokens for REST API integration testing
Technical details & standards
Signs JWT payload using HMAC SHA-256 (HS256) crypto routines client-side.
Frequently asked questions
Are secret keys uploaded to any server?
No. All cryptographic signing occurs entirely inside local browser memory.
Is my data safe?
All processing happens entirely in your browser. Your data never leaves your device and is never sent to or stored on a server.
Does it work offline?
Yes. Once the page has loaded, most tools keep working without an internet connection.