Privacy and security
Calculate HMAC
Generate a SHA-256 HMAC with your supplied UTF-8 secret key.
About calculate hmac
Generate a SHA-256 HMAC with your supplied UTF-8 secret key.
Protect secrets and verify the selected algorithm. A checksum does not certify that a file is safe.
Before you start
- Keep a copy of your original files or text.
- Decide the output and options you need for calculate hmac.
- This page will show its working controls when the tool becomes available.
Inputs and options
| Input | Details |
|---|---|
| Message | Text entered directly |
| Secret key | Your supplied value |
Limits and file privacy
Check the result before using it.
This browser engine processes your input locally. Input and output contents are not saved to your recent-tools list.
Questions about calculate hmac
Can I use calculate hmac now?
This tool is coming soon. Its controls will appear here when it opens.
Does this change my original input?
The browser engine produces a separate result. Keep your original and download the output only after review.
What should I check in the output?
Protect secrets and verify the selected algorithm. A checksum does not certify that a file is safe.