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HMAC Generator

Generate HMAC signatures from message and secret with multiple algorithms and formats.

Input Format:
Input Format:

Result

Hex (Lowercase)
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Hex (Uppercase)
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Base64
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About This Tool

The HMAC generator produces key-based message authentication codes for API signing and integrity checks. It uses the browser Web Crypto API and supports SHA-256/SHA-1/SHA-512/SHA-384, providing lowercase/uppercase hex and Base64 outputs with one-click copy. Everything runs locally.

Features

  • 🔐 Keyed signatures for message authentication
  • 🔁 Algorithms: SHA-256 / SHA-1 / SHA-512 / SHA-384
  • 🔤 Hex output in lower and upper case
  • 🧷 Base64 output for easy transfer
  • 🔒 Local processing only

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