If you search "download chrome os flex iso" on Google, you will find sites like chromeosflexiso[dot]com or getchromeos[dot]net .
Chrome OS Flex is not a direct download of a single .iso file in the traditional Linux sense. This is the most common point of confusion.
If you search for "Chrome OS Flex ISO download," you will find a direct, standalone ISO file on Google’s official servers. Instead, Google uses a proprietary Chrome OS image format ( .bin or .img ) packaged within a Chrome extension called the Chromebook Recovery Utility .
“Don’t say ‘toast.’ There has to be a way.”
This is the easiest method recommended by Google. It handles the download and the flashing process automatically.