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Free Online HMAC Generator

Generate HMAC-SHA256 or HMAC-SHA512 using the entered secret and exact message bytes. This tool processes bounded inputs on this server without retaining submitted content.

Inputs are sent to this server. Uploads are processed temporarily and not retained. Network diagnostics may query public resolvers or the destination website.

Result



How to use HMAC Generator
Generate HMAC-SHA256 or HMAC-SHA512 using the entered secret and exact message bytes. This tool processes bounded inputs on this server without retaining submitted content.
  1. Set Text.
  2. Set Secret.
  3. Set Algorithm.
  4. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Generate HMAC-SHA256 or HMAC-SHA512 using the entered secret and exact message bytes. This tool processes bounded inputs on this server without retaining submitted content. The example below demonstrates Text; Secret; Algorithm.
Example input:
{
  "text": "The quick brown fox jumps over the lazy dog",
  "secret": "key",
  "algorithm": "sha256"
}
Expected result (relevant fields):
{
  "result": "f7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc2d1a3cd8"
}
Features & result limitations
Generate HMAC-SHA256 or HMAC-SHA512 using the entered secret and exact message bytes. This tool processes bounded inputs on this server without retaining submitted content.
Frequently asked questions
What inputs does HMAC Generator accept?
Text; Secret; Algorithm
How should I interpret the HMAC Generator result?
Generate HMAC-SHA256 or HMAC-SHA512 using the entered secret and exact message bytes. This tool processes bounded inputs on this server without retaining submitted content.
Where does HMAC Generator process my data?
Inputs are processed on this server. Uploads use temporary files removed at request end. Public diagnostics contact the named resolvers or website. Private text is not stored in usage counters.