Chromium OS

Chromium OS is an open-source project that aims to build an operating system that provides a fast, simple, and more secure computing experience for people who spend most of their time on the web.

All downloads are located at This will be updated daily where builds compile succcessfully..

Build Instructions for USB

  • Linux
    1. Use p7zip to extract the IMG file from the downloaded file.
    2. At the shell, run the following (where sdX is your USB stick and ChromeOS.img is the path to the IMG file you extracted):
      dd if=ChromeOS.img of=/dev/sdX bs=4M
    3. Boot from USB stick
  • Windows
    1. Use 7zip to extract IMG file from the downloaded file.
    2. Use Win32 Image Writer, then select the IMG file and select the USB device from the menu.
    3. Click on “Write”.
    4. Boot from USB stick

All builds based on x86, amd64 and ARM generic board.

If you want to install to your hard drive, follow the instructions here and here. Heed the warnings noted in the links!

Please note: there is a new behaviour with the chronos user password. The password has been removed from build R55-8777 onward and will continue to be removed for better overall security. Older builds have the password of ‘password’.
This means you need to use ‘chromeos-setdevpasswd’ from either shell or console to set your own password from build R55-8777 onwards.

By default, this also disables SSH access so if you also need this level of access, you will need to set a separate password using ‘sudo passwd chronos’. This allows the password for dev access and SSH access to remain separate if needed.

You can also just set a password using ‘sudo passwd chronos’ and this will allow for both dev and SSH access if you need to keep them the same. Do not use ‘chromeos-setdevpasswd’ if you want to keep the passwords the same.

Once installed, you can update from the Dev Server noted here.

Thanks to The Chromium Projects


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2,072 thoughts on “Chromium OS”

  1. Hi Arnold!

    Thanks for this project. I work in education and we were wondering a couple things. How do I get in contact with you (if at all) regarding development questions?


  2. Hello. I have a slight problem…. I have tried daily and vanilla build, but they remain stuck to the chromium logo. If i connect the usb stick in another port, sometimes it goes to a black screen after logo(no backlight). I can get in the shell/console… I have a gt440 and a phenom ii x2 560…. If i try to enter enable_dev_usb_boot, it says that the firmware is not a ChromeOS one(on both builds). Help

  3. Hi Arnold, thanks for all your great work – I have installed your chromium os on several hp laptops of varying models and it works well. I am now trying to do the same for a Lenovo Thinkpad E535 but I have the problem where I get the Chromium logo and then a black screen with a mouse pointer. I believe this may be due to the graphics card not being supported. The card installed is, I believe, the AMD Radeon HD 7640G. Is there any chance that this will be supported in the near(ish) future? I know you must be busy.

  4. Wifi will be unavilable when the OS boots up for 2~3 minutes.
    My OS version is Camd64OS-20170216010101 and I installed it on an intel x64 laptop.

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