Sample JWT Generator
Create test JWT tokens with custom claims, expiration, and signing algorithms
All processing happens in your browser. No data is sent to any server.
FOR TESTING/LEARNING ONLY
This generates sample JWTs with a random fake signature. They are NOT cryptographically signed and must not be used for authentication.
Why This Tool
Testing JWT authentication flows requires valid-looking tokens with specific claims. This tool generates sample JWTs with custom payloads, configurable expiration, and different signing algorithms — without running a backend.
How It Works
Set the header (algorithm), define payload claims (sub, name, iat, exp, custom fields), and generate. The tool creates a properly formatted JWT token you can use in development and testing.