Free JWT Generator Online
Generate signed HS256 JWT tokens with custom payload and expiry. Runs entirely in your browser.
Key Features
Everything you need to create JWT tokens
Generates tokens signed with HMAC-SHA256. Compatible with all major JWT libraries and frameworks.
Add any claims to the JSON payload. Standard claims like sub, name and iat are pre-filled.
Your secret key and payload never leave your browser. The HMAC computation runs entirely client-side.
About This Tool
This free JWT generator creates signed HS256 JSON Web Tokens directly in your browser. Enter a secret key, customize the JSON payload and select an expiry time to generate a valid JWT token you can use in your applications.
Frequently Asked Questions
Is this tool completely free?
Yes. The tool is 100% free to use with no registration, no subscription and no usage limits.
You can use it as many times as you need for personal or commercial projects without any cost.
We believe developer tools should be accessible to everyone without paywalls.
Is my secret key safe?
Yes. All processing happens locally in your browser using JavaScript. Your secret key is never transmitted to any server.
The HMAC-SHA256 computation runs entirely client-side using a pure JavaScript implementation.
You should still use unique secret keys for testing rather than your production secrets as a general security practice.
What algorithm does this tool use?
This tool uses the HS256 algorithm which is HMAC with SHA-256. This is the most widely supported JWT signing algorithm.
The generated tokens are fully standard and compatible with jwt.io, node-jsonwebtoken, python-jose, jjwt and other JWT libraries.
RS256 and other asymmetric algorithms are not supported as they require private keys unsuitable for browser tools.
Can I use these tokens in production?
Technically yes, the tokens are valid HS256 JWTs. However for production use we recommend generating tokens server-side using a trusted JWT library.
Always use strong, random secret keys of at least 32 characters and keep them confidential.
This tool is primarily intended for development, testing and debugging purposes.