How to use: HMAC Generator

HMAC Generator is a free online Hash Tools tool that create keyed HMAC signatures with SHA-256/384/512 instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.

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Description

Create keyed HMAC signatures with SHA-256/384/512.

  • Hash Tools
  • Because everything is computed client-side, HMAC Generator is safe to use with sensitive data such as API keys, tokens or private logs.
Input HMAC Generator Output Runs 100% in your browser — your data never leaves your device.
HMAC Generator — Input → Output

How to use

Using HMAC Generator takes three steps:

  1. Paste your data into the input box (or load the example).
  2. Configure the options to match your target format or scenario.
  3. Copy, download or inspect the output — it updates live as you type.
How to use · HMAC Generator 1 Paste your data intothe input box (or loadthe example). 2 Configure the optionsto match your targetformat or scenario. 3 Copy, download orinspect the output —it updates live as youtype.
How to use

Run

Examples

HMAC-SHA256 with a secret key.

Input

payload-to-sign

Output

c7d0a5cdb17cfd4915e3f2550ee3db0e089f368ba80084a14d6395a8793b04b7

This output was produced by actually running the tool, not written by hand.

Use cases

Common situations where HMAC Generator helps:

  • Create keyed HMAC signatures with SHA-256/384/512.

Parameters

This tool has no options — it works on the input alone.

FAQ

What is HMAC Generator?

HMAC Generator create keyed HMAC signatures with SHA-256/384/512. It runs entirely in your browser, so your data stays private.

Is HMAC Generator free to use?

Yes. HMAC Generator is free, unlimited and works without registration or installation.

Does my data get uploaded?

No. All processing happens locally in your browser; nothing is sent to any server.

Good to know

  • Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.

Related tools

MD5 Hash GeneratorCompute the MD5 digest of any string.SHA-1 Hash GeneratorCompute the SHA-1 digest of any string.SHA-256 Hash GeneratorCompute the SHA-256 digest — the standard for modern integrity checks.SHA-384 Hash GeneratorCompute the SHA-384 digest of any string.SHA-512 Hash GeneratorCompute the SHA-512 digest of any string.CRC32 ChecksumCalculate the CRC32 checksum of text or files.

HMAC Generator → · Hash Tools →

Related guides

MD5 vs SHA-1 vs SHA-256: Choosing a Hash FunctionJWT Anatomy: Header, Payload, Signature — and Why Decoding Is Not Verifying

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