Toolzy

HMAC Generator

Generate an HMAC signature from a message and secret key.

HMAC (hex)

Compute a keyed HMAC digest using SHA-1, SHA-256, SHA-384 or SHA-512, entirely in your browser.

How to use

  1. Enter your message and secret key.
  2. Pick a hash algorithm.
  3. Copy the resulting HMAC.

Frequently asked questions

What is HMAC used for?
Verifying message integrity and authenticity, e.g. webhook signatures and API auth.
Is my key sent anywhere?
No, the HMAC is computed locally with the Web Crypto API.

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