While there is no "official" ISO file for ChromeOS, you can download the 64-bit ChromeOS Flex installer for free directly from Google. ChromeOS Flex is the official version designed specifically for non-Chromebook hardware, such as PCs and Macs. Modernizing Legacy Hardware with ChromeOS Flex
By following this guide, you'll be able to download and experience the latest version of Chrome OS as an ISO file, 64-bit compatible, and completely free. chrome os download iso 64 bit latest version free
Result: You can boot any PC from that USB to try it live or install it permanently. This is the correct answer to your search. While there is no "official" ISO file for
Google does not officially provide a standalone file for ChromeOS. Instead, for modern 64-bit PCs and Macs, Google offers ChromeOS Flex , which is downloaded as a compressed recovery image and installed via a USB drive. How to Get the Latest Version of ChromeOS Flex Format a USB drive (8 GB+)
Verdict: There is no official "Chrome OS ISO" available for free download.
Creating a Bootable USB Drive
If you are searching for an official Google-provided Chrome OS ISO file (like you would find for Windows or Ubuntu), it does not exist.