4 Ways to Use Chromebook as a Second Monitor

Chromebooks are known for their lightweight design and small operating system footprint. But what if you want to make the most out of your Chromebook's screen real estate when working on your Windows, Mac, or Linux machine? Luckily, there are several apps available that allow you to use your Chromebook as a second monitor. In this article, we will explore the best apps, both free and paid, that can help you set up a dual monitor system without the need to purchase an additional monitor.

1. Duet Display

Duet Display is a paid app that provides a seamless and reliable connection between your devices. Although it comes with a price tag of $9.99, it is well worth the investment. You only need to purchase the app on your Chromebook, while the Windows and Mac clients are free for paid customers. Keep an eye out for any offers from Google that include Duet Display as a perk when buying a Chromebook.

To get started, download the Duet Display app from the Play Store on your Chromebook. Then, install the Windows or Mac client on your system. Enable the “Screen Sharing Enabled” option in your profile settings. Open the Duet Display app on your Chromebook, select “Android” from the sidebar, and choose the “Air” option. Note that the wired connection option does not work with Chromebooks.

Once the app is open on your Chromebook, you will find your Chromebook's IP address. Click on it to connect. If it doesn't appear, you can manually enter the IP address by clicking on the “Connect to IP Manually” button. That's it! You're all set to use your Chromebook as a second monitor.


  • Wireless connectivity
  • Easy and seamless setup process
  • Reliable performance with minimal lag, even with a wireless connection


  • Paid app with a one-time cost of $9.99
  • Wired option does not work with Chromebooks

2. Splashtop Wired XDisplay

Splashtop Wired XDisplay is a free app that requires a USB cable to connect your devices. Unlike Duet Display, it does not support wireless connections. However, it offers comparable reliability and minimal lag between devices.

To use Splashtop Wired XDisplay, download the app on your Chromebook and install the desktop client on your Mac or Windows machine. Connect both devices using a USB cable and launch the app on both devices. On Windows, press Win+P and select the “Extend displays” option to start mirroring your desktop on your Chromebook. To use the Chromebook as a secondary display, go to the “Advanced” tab and deselect the “Enable Mirror mode” option. On Mac, navigate to WiredXDisplay > Preferences > Arrangement and disable the “Mirror Displays” option.


  • Reliable performance with minimal lag due to the wired connection
  • Completely free to use


  • Cannot connect wirelessly

3. Spacedesk

Spacedesk offers both wired and wireless connectivity options, making it a versatile choice. You can connect your devices using Wi-Fi, USB, or a LAN cable. Download the Spacedesk app on your Chromebook and the corresponding software on your Windows or Mac device.

Once the devices are connected, open the app on your Chromebook. You will see a list of all connected devices with the app installed. Simply select a device to establish a connection. The system display will be mirrored on your Chromebook screen, and you can adjust the display settings using the native options on your Windows or Mac machine.

While Spacedesk provides a variety of connectivity options, there may be occasional lags and stutters when using a wireless connection. If you prefer a wireless option, Duet Display is still the recommended choice.


  • Supports both wired and wireless connectivity options
  • Free to use


  • Wireless connectivity may be buggy and unreliable

4. Deskreen

If you are a Linux user, Deskreen is an open-source application that allows you to use your Chromebook as a second display. It offers wireless connectivity and features such as app sharing, screen mirroring, and teleprompter mode.

To use Deskreen, download the application on your Windows, Mac, or Linux desktop and complete the setup process. Connect both devices to the same Wi-Fi network. On the desktop app, you will find a QR code. Scan the QR code using a QR code scanner app on your Chromebook. This will provide a link to the Deskreen website, where you can view the second screen of your desktop on your Chromebook screen. Click on the full-screen button to use the Chromebook as a secondary monitor in fullscreen mode.

Deskreen is free and open-source. However, it may experience occasional lag and stutters.


  • Works with Windows, Mac, and Linux
  • Free and open-source software


  • Can only connect wirelessly
  • May experience lag and occasional stutters

One Stone, Two Birds

If you are willing to pay a one-time fee of $9.99, Duet Display offers a wireless, fast, and easy-to-set-up solution. Alternatively, Spacedesk and Splashtop Wired XDisplay provide free options that can get the job done. For Linux users, Deskreen is the best choice as it is open-source, free, and compatible with all platforms. And if you don't have a Chromebook, you can also use your Android phone as a second monitor.

With these apps, you can make the most out of your Chromebook's screen real estate and enhance your productivity with a dual monitor setup.