ChromeOS Flex is Google’s lightweight operating system designed to bring new life to old Windows and Mac computers. To install it, you first need to create a bootable USB drive. If you’re already using a Chromebook, the process is actually very simple—because Google provides an official tool that works perfectly on ChromeOS.
Unlike Windows or macOS, you don’t need third-party software, command-line tools, or ISO files. Everything can be done directly from your Chromebook using a Chrome extension.
Now, if you are here reading about how to make a ChromeOS Flex bootable USB on a Chromebook, we assume you want a clean, official, and error-free setup. In this detailed guide, we’ll walk you through the entire process step by step.
What Is ChromeOS Flex?
ChromeOS Flex is a free operating system from Google that:
- Runs on old PCs and Macs
- Is cloud-first and lightweight
- Receives automatic updates
- Does not support Android or Linux apps
It’s ideal for reviving slow or unsupported computers.
Things You’ll Need Before You Start
Before creating the bootable USB, make sure you have:
- A Chromebook with Google Chrome
- A USB flash drive (8 GB or larger)
- A stable internet connection
- The USB drive backed up (it will be erased)
Once ready, you can begin.
1. Insert the USB Drive into Your Chromebook
- Plug the USB flash drive into your Chromebook.
- If the Files app opens automatically, you can close it.
Make sure ChromeOS detects the USB drive properly.
2. Install the Chromebook Recovery Utility
Google uses the Chromebook Recovery Utility to create ChromeOS Flex bootable media.
- Open the Google Chrome browser on your Chromebook.
- Go to the Chrome Web Store.
- Search for Chromebook Recovery Utility.
- Click Add to Chrome.
- Confirm by clicking Add extension.
Once installed, the tool will be available as a Chrome app.
3. Launch the Chromebook Recovery Utility
- Click the Launcher.
- Search for Chromebook Recovery Utility.
- Open the app.
You’ll see a welcome screen asking you to get started.
4. Select ChromeOS Flex as the Operating System
This is the most important step.
- In the Recovery Utility, click Get started.
- On the next screen, click Select a model from a list.
- Under Manufacturer, select Google ChromeOS Flex.
- Under Product, select ChromeOS Flex.
- Click Continue.
This tells the tool you want to create ChromeOS Flex, not Chromebook recovery media.
5. Choose Your USB Drive
- Select your USB flash drive from the list.
- Double-check that you selected the correct drive.
- Click Continue.
All data on the USB drive will be erased.
6. Create the ChromeOS Flex Bootable USB
- Click Create now.
- The tool will:
- Download ChromeOS Flex
- Verify the image
- Write it to the USB drive
This process can take 10–20 minutes, depending on your internet speed.
Do not remove the USB drive during this process.
7. Wait for the Process to Complete
Once finished, you’ll see a confirmation message.
- Click Done.
- Safely remove the USB drive from your Chromebook.
Your ChromeOS Flex bootable USB is now ready.
8. Use the USB to Boot Another Computer
To use the USB on a PC or Mac:
- Insert the USB into the target computer.
- Power it on.
- Press the boot menu key
(usually Esc, F12, F9, or F10, depending on the device). - Select the USB drive.
- ChromeOS Flex will boot in live mode.
From there, you can try ChromeOS Flex or install it permanently.
Can You Install ChromeOS Flex on the Chromebook Itself?
No. ChromeOS Flex cannot be installed on Chromebooks.
Chromebooks already run ChromeOS and use different firmware. The USB is meant for Windows PCs and Macs, not Chromebooks.
Wrapping Up
With that, we wrap up our detailed guide on how to make a ChromeOS Flex bootable USB on a Chromebook. Thanks to Google’s official Chromebook Recovery Utility, the process is straightforward, safe, and beginner-friendly—no ISO files or complex steps required.
If you’re planning to revive an old PC or Mac, creating the ChromeOS Flex USB on a Chromebook is actually one of the easiest ways to get started. We hope this guide helped you create the bootable USB smoothly and without confusion.
