Security

HMAC Generator

Create a keyed HMAC-SHA-256, HMAC-SHA-384 or HMAC-SHA-512 authentication code from UTF-8 text locally.

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HMAC · HMAC-SHA-256

Choose “Generate HMAC” to see the result here.

Processed locally in your browser. Inputs and results are not uploaded or saved by this page.

HMAC is a keyed message authentication code, not encryption. Keep real keys secret. The example key is public and must not be used as a real secret.

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What does this tool do?

Create a keyed HMAC-SHA-256, HMAC-SHA-384 or HMAC-SHA-512 authentication code from UTF-8 text locally. Inputs: Message, Secret key, Algorithm. Outputs: HMAC.

How to use it

Enter a message and secret key, then choose the HMAC algorithm. Choose “Generate HMAC”, then copy the result if needed. Clear removes text, secrets, file selection and results, and restores option defaults.