BuildUtilities

HMAC Generator – Free Online Tool

Generate HMAC signatures using SHA-256, SHA-512, and other algorithms.

✦ FreeNo SignupInstantSecurityJSON Web Tokens ExplainedHashing & Cryptographic Digests

Example

Input

Message: hello, Key: secret, Algorithm: SHA-256

Output

88aab3ede8d3adf94d26ab90d3bafd4a2083070c3bcce9c014ee04a443847c0b

The HMAC-SHA256 signature of 'hello' with key 'secret'.

How to Use HMAC Generator

  1. 1

    Enter Message

    Type or paste the message to sign.

  2. 2

    Enter Key

    Provide the secret key for HMAC generation.

  3. 3

    Choose Algorithm

    Select SHA-256, SHA-384, or SHA-512.

Common Use Cases

  • ✦Generating webhook signatures
  • ✦Creating API authentication tokens
  • ✦Verifying message integrity

Embed This Tool

Add this tool to your website or blog with a simple iframe embed.

<div style="max-width:480px"><iframe src="https://buildutilities.com/embed/hmac-generator?ref=embed" width="480" height="360" frameborder="0" style="border-radius:8px;border:1px solid #2a2e3a;width:100%"></iframe><p style="font:11px sans-serif;color:#888;margin:4px 0 0;text-align:right">Powered by <a href="https://buildutilities.com/hmac-generator?ref=embed" target="_blank" rel="noopener">BuildUtilities</a></p></div>

Share

Share a link to this tool. Results can be passed via URL parameters.

https://buildutilities.com/share/hmac-generator

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