Utilora

Free HMAC Generator Online

Generate HMAC codes for API authentication and webhook signing. All processing done in your browser.

How to use

  1. 1

    Enter your secret key

    Type your secret key (shared with the receiving party).

  2. 2

    Enter your message

    Type the message to sign.

  3. 3

    Copy the HMAC

    Copy the generated HMAC for use in your API.

Why use this tool?

  • Runs entirely in your browser - no server involvement
  • Supports HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512
  • Output as base64 for easy API use

Frequently asked questions

What is HMAC?
HMAC (Hash-based Message Authentication Code) is used to verify message integrity and authenticity.
When should I use HMAC?
HMAC is commonly used for signing API requests and webhook payloads.

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