JWT Generator
FreeGenerate and sign JSON Web Tokens with custom payloads
Signed in your browser with WebCrypto (HMAC). The secret never leaves your device. Verify the token at jwt.io.
About JWT Generator
When you're building or testing authentication, you often need a signed JSON Web Token with a specific payload, generating one by hand with the right header, claims, and signature is exactly the kind of thing a tool should do. This generator creates and signs JWTs with custom payloads so you can produce valid tokens for development and testing.
Define your claims, choose the signing algorithm and secret, and the tool assembles and signs the token. It's handy for testing protected endpoints, debugging auth flows, and understanding token structure. The tool is free and runs in your browser without an account. Use it for development, never put production signing secrets into any online tool, and keep real secrets on your own systems.
Common uses
- Generate a signed JWT to test a protected API endpoint during development
- Create tokens with custom claims to debug an authentication or authorization flow
- Produce sample tokens for documentation or integration examples
- Inspect token structure while learning how JWTs are signed and encoded
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- Instant generation
- Copy-ready output
- No login required
FAQ
Can I set custom claims in the payload?
Yes. You define the payload claims and the tool encodes and signs them into a valid JWT.
Should I use my production signing secret here?
No. Never enter real production secrets into any online tool. Use throwaway secrets for testing and keep production keys on your own infrastructure.
Is the generated token a standard JWT?
Yes. It produces a standard header.payload.signature JWT that compatible libraries can verify with the matching secret and algorithm.
Can I use JWT Generator on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.