However, it does offer:
Google does not provide a direct "ChromeOS ISO" download for standard PCs. Instead, you can download ChromeOS Flex
If you've landed here by typing "Google Chrome OS download ISO 64 bit" into your search engine, you are not alone. Millions of users search for this exact phrase each month, hoping to breathe new life into an old laptop or test Google's lightweight operating system on their existing hardware.
Minimum 4 GB RAM (8 GB recommended for heavy Linux container use).
If the limitations of ChromeOS Flex (no Android apps) are a dealbreaker, but you still want a "Chrome OS" feel on generic hardware, explore community projects:
ChromeOS Flex is Google's official solution for transforming your old hardware into a fast, secure, and easy-to-manage device. Born from the technology of CloudReady after Google's acquisition of Neverware, Flex brings the core Chrome OS experience to non-Chromebook devices.