HMAC Generator
Generate HMAC-SHA-256 or HMAC-SHA-512 signatures from a secret key and message using Web Crypto.
What this tool does
Generate HMAC-SHA-256 or HMAC-SHA-512 signatures from a secret key and message using Web Crypto.
Where this tool is useful
Calculate message authentication codes locally for testing integrations.
Example or format details
Calculate message authentication codes locally for testing integrations.
How to use HMAC Generator
- 1
Paste the technical input into the form and choose any relevant algorithm or formatting options.
- 2
Adjust the fields and options, then select Run tool.
- 3
Inspect the actual result. Copy the text or download the generated file when appropriate.
Privacy and processing
Entered content and chosen files are processed locally in your browser. No conversion request is sent to a freedropper server.
Common questions
What can I use this for?
Calculate message authentication codes locally for testing integrations.
What does the tool accept?
Paste the technical input into the form and choose any relevant algorithm or formatting options.
What should I check before using the output?
Check the accepted input, output format and settings before reusing the result. Calculate message authentication codes locally for testing integrations.
Does my input leave my device?
The utility runs in your browser. Selected content is not transmitted to a freedropper conversion service.
How can I reuse the result?
Copy the output or use the download control when the tool produces a file. Check the target application accepts the resulting syntax or file type.