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Random Hex Generator

Generate random hexadecimal strings of an exact byte length.

Each byte is two hex characters.

Processed in your browser

Fill in the form and press “Generate” to see the result here.

How to use it

  1. 1Paste your input into the input box, or type it directly.
  2. 2Adjust the options if you need something other than the defaults.
  3. 3The result updates as you type.
  4. 4Copy the result to your clipboard or download it as a file.

About the Random Hex Generator

Specifying bytes rather than characters is what you want when generating a key: a 32-byte value is 256 bits regardless of how it is printed.

Hex is the format most command-line tools and configuration files expect for keys and initialisation vectors.

Questions people ask

Is your code uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your code never leaves your device. You can confirm it by opening your browser's network panel while the tool runs, or by disconnecting from the internet after the page has loaded.

Is it free, and do I need an account?

Yes, it is free, and there is no account, no sign-up and no watermark on the result. The project is funded by optional donations.