HMAC Generator
Generates HMAC (Hash-based Message Authentication Code) signatures for a message using a secret key, supporting MD5, SHA-1, SHA-256, and SHA-512, with hex and base64 output.
HMAC Generator — Free Online Tool
Generates HMAC (Hash-based Message Authentication Code) signatures for a message using a secret key, supporting MD5, SHA-1, SHA-256, and SHA-512, with hex and base64 output.
How to use the HMAC Generator
- Open the tool above — it runs entirely in your browser, so your input never leaves this page.
- Paste or type your input into the field, then press the relevant button (e.g. Encode / Decode, Generate, or Convert).
- Copy the result from the output area with the copy button orCtrl/Cmd + C.
- No signup, no upload, and no tracking — repeat as often as you need.
Frequently asked questions
Is the HMAC Generator free to use?
Yes. The HMAC Generator is completely free, with no signup, no ads inside the tool, and no hidden limits.
Does the HMAC Generator upload my data?
No. The HMAC Generator processes everything locally in your browser. Your input is never sent to a server, so it stays private even on shared devices.
Does the HMAC Generator work offline?
After the page loads, the HMAC Generator runs entirely in your browser, so it keeps working without a network connection.
Free & private — why use this HMAC Generator
The HMAC Generator runs 100% client-side in your browser. Your data is never uploaded to a server, no account is required, and the tool is completely free. It works offline once the page has loaded and is part of a growing collection of privacy-first developer utilities.