EasyFilesConverter

HMAC generator

Create HMAC-SHA256, SHA-384, SHA-512 or SHA-1 signatures in hex and Base64 - to test webhook signatures and API signing.

Hash

Free · No sign-up · Your files are processed on your device and never uploaded

How to use HMAC generator

  1. Paste or type…
    1

    Paste or type

    Put your content in the box - or try the example.

  2. Result appears instantly
    2

    Watch the result

    The result updates as you type - choose options above if needed.

  3. TXTCopy / Download
    3

    Download the result

    Ready in seconds. Your file never left your device.

Features

  • Hex, Base64 and Base64url.
  • Uses the browser’s Web Crypto.
  • Great for checking Stripe/GitHub webhook signatures.

Free and private

Everything runs in your browser. Nothing you paste is uploaded, logged or stored.

Questions

Is the secret uploaded?

No - everything stays in your browser. Still, prefer test secrets.

Is it free?

Yes - free and unlimited, with no sign-up and no watermark.

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