Generators
HMAC Generator
Generate an HMAC signature with Web Crypto.
100% free · runs in your browser · nothing is uploaded.
Why use this tool
- 100% free, forever
- No sign-up or login
- Runs entirely in your browser
- Your files never leave your device
- Unlimited use, no watermarks
- Works on desktop and mobile
How to use HMAC Generator
- 1
Open HMAC Generator — it loads instantly in your browser.
- 2
Enter or upload your input and adjust any available options.
- 3
Copy or download your result. Nothing is uploaded.
Compute an HMAC (SHA-256/384/512/1) from a message and secret key, locally via the Web Crypto API.
Frequently asked questions
Yes — HMAC Generator is completely free, with no sign-up, no usage limits, and no watermarks.