How to use hmac generator / verifier
Calculate or verify a SHA-256 or SHA-512 HMAC using a text or hexadecimal key through your browser’s cryptographic API.
- Enter your own values or choose a supported file.
- Adjust the options and run the tool.
- Review the result, then copy, export or save it when available.
Try this next
Compare HMAC output before and after adding a newline to a sample message.
HMAC is authentication with a shared secret, not encryption or a public-key signature. Avoid using production secrets in untrusted pages or screenshots.
Questions, answered.
Is hmac generator / verifier free to use?
Yes. This tool is part of Nepocore’s free browser toolkit. There is no paid tier, file-download gate or application account required.
What should I check before using the result?
HMAC is authentication with a shared secret, not encryption or a public-key signature. Avoid using production secrets in untrusted pages or screenshots.
Does this tool upload my files or text?
The tool processes its input in your browser. File contents and text are not sent to a processing server. See the privacy page for local storage and hosting details.