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Create JWT tokens for testing and development.
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JWT Generator builds and signs a JSON Web Token from a header, payload, and secret, a handy tool for testing authentication flows, experimenting with claims, and learning how JWTs are constructed.
A JWT has three parts, header (algorithm), payload (claims), and signature, and this tool encodes the first two and signs them with your secret to produce a complete token. It's the counterpart to the JWT Decoder: generate a token here, decode it there to inspect its structure.
Use it strictly for development, testing, and learning. Real production tokens should be issued by your authentication server, which handles secrets, expiry, and signing securely, and you should never paste a real production signing secret into any tool (use a test secret; generation here is local, but the habit matters). When a generated token fails server verification, it's almost always a secret/algorithm mismatch or missing required claims.
A core security reminder: a JWT payload is encoded, not encrypted, so it's readable by anyone holding the token, never put passwords or secrets in the claims. Generation runs entirely in your browser. Pair it with the JWT Decoder and the other ToolsMonk developer tools.
| Price | Free, no signup, no paywall, no watermark |
|---|---|
| Works on | Any modern browser: desktop, tablet, and mobile |
| Processing | In your browser, files never leave your device |
| Account required | None |
| Category | Developer Tools |
Set the header (algorithm), the payload claims, and a signing secret
The tool encodes and signs the token
Copy the resulting JWT
Use it for testing (paste into the JWT Decoder to verify its contents)
Builds and signs a JSON Web Token (JWT) from a header, payload, and secret
Supports common HMAC signing algorithms
Useful for testing and learning auth flows
Runs in your browser, your secret and data never leave your device
Copy the generated token
Free, with no signup and no rate limit
Generating a test JWT for development and API testing
Learning how JWTs are structured and signed
Creating a token with specific claims to test an endpoint
Debugging authentication during development
Use only for testing/learning, issue real tokens from your auth server, never paste production secrets
Match the signing secret and algorithm exactly to what your server verifies with
Never put secrets in the payload, it's readable by anyone holding the token
Common questions about this tool, its workflow, and what to expect before you use it.
IETF
Defines the header, payload and signature parts and the registered claims such as exp and iat.
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Create JWT tokens for testing and development.
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