JWT Generator
Edit header and payload JSON, supply an HMAC secret, and sign with Web Crypto. Use for local tests only — treat secrets carefully even on-device.
Runs entirely in your browser. Your data never leaves this device.
- HS256 signing
- Editable claims
- Web Crypto
- Copy token
- Pairs with JWT decoder
How it works
- Adjust the controls or paste your input.
- Preview results instantly in the browser.
- Copy or download the output — nothing is uploaded.
Key features
- HS256 signing
- Editable claims
- Web Crypto
- Copy token
- Pairs with JWT decoder
FAQ
Is this private?
Yes — processing runs in your browser; we do not upload your inputs.
Do I need an account?
No — free to use without signup.
Does it work offline?
After the page loads, most tools work without further network calls.
Mobile friendly?
Yes — layouts adapt to smaller screens.
Which algorithms are supported?
HS256 only in this MVP, signed locally with Web Crypto and your secret.
Keep building
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