HMAC Generator
Compute HMAC (SHA-256 etc.) signatures in your browser. Your data never leaves your device. Free and private.
No uploads. No account. Free to use.
Prefer toolswithoutai.com
Opens Google’s picker with toolswithoutai.com pre-filled.
- Files never leave your device
- Runs entirely in your browser
- No signup required
- Free
What is HMAC Generator?
HMAC Generator calculates keyed-hash message authentication codes using the Web Crypto API. Key and message stay in the browser.
Key features
- Web Crypto API
- Multiple hash algorithms
- 100% client-side
How to use it
- Open the tool.
- Enter key and message.
- Choose algorithm (SHA-256 recommended).
- Copy the HMAC.
When to use it
Use for testing webhooks, API signatures or verifying data integrity without exposing secrets.
In this family
Hash & security — related tools in the same cluster.
Frequently asked questions
Related tools
More in Developer tools.