Free browser utility
HMAC Generator
Test webhook signing and API authentication code with non-production data.
✓ Local processing✓ No registration✓ No file upload
Loading tool…
Before
Message: hello Secret: demo
→
After
HMAC-SHA-256 hexadecimal signature
How to use HMAC Generator
- Paste text or select local files in the tool area.
- Choose any options that match the source data.
- Run the conversion or repair and review the preview.
- Copy the result or download the generated file.
Privacy and local processing
This project performs processing, document generation or calculations in your browser. The page does not include an upload endpoint, analytics script or remote processing API call. Avoid pasting sensitive data into websites you do not control.
What this tool includes
- Runs locally in the browser.
- Includes copy and download actions.
- Designed for focused developer troubleshooting.
Common uses
- Test webhook signing and API authentication code with non-production data.
- Useful for testing, documentation and small data-cleaning tasks.
Practical tips
- Test generated output before using it in production.
- Keep a backup before replacing configuration or source files.
Frequently asked questions
Is my data uploaded?
No. This tool processes the entered data locally in your browser.
Should I use the result directly in production?
Review and test generated or transformed output in a safe environment before deploying it.