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CRC32 Generator

Generate a CRC32 checksum, the 8-character value used inside ZIP and PNG files.

Processed in your browser

Your result will appear here as soon as you add some input.

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 CRC32 Generator

CRC32 is an error-detecting code, not a hash. It is designed to catch the kinds of corruption that happen on a wire or a disk, and it is trivially easy to produce a chosen collision.

It is what ZIP archives and PNG chunks use internally, which is why it shows up when inspecting those formats.

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.