If you prefer to download the raw image file to use with tools like Rufus, BalenaEtcher, or Ventoy, you can grab the official payload directly from Google's serving servers.
Google does not publish an official standalone ISO, but some advanced users extract the downloaded recovery image (a .bin or .zip) and convert it to other formats. This is not officially supported and may risk integrity or updates. If you choose this route: chrome os flex download iso 64 bit exclusive
Deploying a lightweight 64-bit OS breathes new life into older computing systems. If you prefer to download the raw image
Method 2: The Official Chrome Recovery Utility (Recommended) chrome os flex download iso 64 bit exclusive