JWT Generator Online Free
Create JSON Web Tokens with custom header and payload. Support for HS256, HS384,...Create JSON Web Tokens with custom header and payload. Support for HS256, HS384, HS512 algorithms. 100% client-side - tokens never leave your browser.
JWT Configuration
Generator Features
Why Use JWT Generator Online Free?
Instant Generation
Generate JWTs instantly with any custom payload. No server delays, no API calls needed.
100% Private
All generation happens in your browser. Your secret keys and payloads never leave your device.
Multiple Algorithms
Support for HS256, HS384, and HS512. Choose the right security level for your needs.
Completely Free
No signup, no limits, no premium features. Generate unlimited JWTs for free.
Common Uses for JWT Generator
API Development
Generate test tokens for API authentication during development and testing.
Debugging
Create tokens with specific claims to debug authentication and authorization flows.
Learning
Understand JWT structure by creating tokens with different payloads and algorithms.
Testing
Generate tokens for automated testing, integration tests, and QA verification.
How It Works
Choose Signing Algorithm
Select HS256, HS384, or HS512 based on your security requirements. HS256 is most common, HS512 offers strongest security.
Enter Secret Key
Provide the secret key used to sign the token. This key must match when verifying the token on your server.
Define Payload Claims
Enter your JWT payload as JSON. Include standard claims like 'sub' (subject), 'exp' (expiration), and custom claims.
Copy and Use Your Token
Click generate, then copy the JWT. Use it in API requests by adding 'Authorization: Bearer <token>' header.
Tips & Security Notes
Always Set Expiration
Include an 'exp' claim in your payload. Tokens without expiration are a security risk as they remain valid indefinitely.
Use Strong Secret Keys
For production, use a random string of at least 256 bits (32 characters) as your secret key for HS256.
Testing Only
Tokens generated in the browser are for testing. Production tokens should be generated server-side with proper key management.