Screen sharing on Chrome means casting your entire screen or a single tab to a Chromecast device
When you screen share on Chrome, you send what you see on your computer to a TV or monitor connected to a Chromecast device. You have two options: cast your whole screen, or cast just one browser tab. The whole-screen option is useful when you want to show documents, photos, or presentations from any program on your computer. The tab-only option is better when you want to share something from the web but keep the rest of your screen private.
Both methods use the same built-in Chrome casting tool. You do not need to install anything extra or create a special account. Your computer and Chromecast device just need to be on the same Wi-Fi network.
Key Takeaways
- Open Chrome, click the three-dot menu, select "Cast", then choose your Chromecast device and whether to share your whole screen or just your current tab.
- Your computer and Chromecast must be connected to the same Wi-Fi network for screen sharing to work.
- You can stop screen sharing at any time by clicking the Cast icon again and selecting "Stop casting".
- If your Chromecast does not appear in the Cast menu, restart both your computer and the Chromecast device, then try again.
How to cast your entire screen
Open Google Chrome on your computer. In the top right corner, click the three vertical dots (the menu button). Scroll down and click "Cast". A window will pop up showing all Chromecast devices on your network. Click the device you want to use.
A second window will appear asking what you want to cast. Select "Cast entire screen" from the dropdown menu at the top. Click "Share" to begin. Your screen will now appear on the TV or monitor connected to that Chromecast device. A blue bar with a Cast icon will appear at the top of your screen, showing that casting is active.
How to cast a single Chrome tab
Open the tab in Chrome that you want to share. Click the three-dot menu in the top right corner and select "Cast". Choose your Chromecast device from the list. When the casting window appears, select "Cast tab" from the dropdown menu instead of "Cast entire screen". Click "Share".
Only that one tab will appear on the TV. The rest of your screen stays private on your computer. This is useful when you want to show a website or video to others without revealing your other open tabs or desktop. You can switch between tabs on your computer, and only the tab you are actively viewing will show on the TV.
Checking your Wi-Fi connection
Before you try to cast, make sure your computer and Chromecast device are on the same Wi-Fi network. On your computer, check the Wi-Fi icon in the system tray (bottom right on Windows, top right on Mac) and note which network you are connected to. Then check the Chromecast device itself—it should show the same network name in its settings.
If your computer is on a different network than the Chromecast, they cannot find each other. Switch your computer to the same network as the Chromecast and try casting again. Some homes have multiple Wi-Fi networks (like a main network and a guest network), so double-check that both devices are on the same one.
What to do if your Chromecast does not appear
If you open the Cast menu and do not see your Chromecast device listed, the most common fix is to restart both devices. Unplug the Chromecast from power for 10 seconds, then plug it back in. While it is restarting, close Chrome completely on your computer and reopen it. Once the Chromecast light stops blinking and becomes solid, try the Cast menu again.
If the device still does not appear, check that both are truly on the same Wi-Fi network. Walk over to the TV and look at the Chromecast settings to confirm the network name. If they are on different networks, reconnect the Chromecast to your main network using the Chromecast app on your phone or the TV remote. Then try casting from Chrome again.
Stopping screen sharing and troubleshooting audio
To stop casting at any time, click the Cast icon (it looks like a rectangle with curved lines) in the top right corner of Chrome. A menu will appear showing which device is currently receiving your screen. Click "Stop casting" to disconnect when ready. The blue bar at the top of your screen will disappear, and your screen will no longer appear on the TV.
If you are casting a tab and the audio is not coming through the TV speakers, check the volume on your computer first. Some computers route audio differently when casting. If the volume is up but you still hear sound only from your computer, try casting your entire screen instead of just the tab—this sometimes fixes audio routing issues. You can also check the TV remote to make sure the TV volume itself is not muted.
Casting from different devices and browsers
Screen sharing through Chrome works on Windows, Mac, and Linux computers. The steps are the same on all three. You cannot cast from Chrome on a phone or tablet to a Chromecast—those devices use different casting methods (like Google Home app or AirPlay). If you want to share from a phone, use the Google Home app instead.
Chrome is the only browser that has this built-in casting feature. Firefox, Safari, and Edge do not have a native Cast option. If you need to cast from a different browser, you would need to use a different method, such as HDMI cable or a different casting device designed for that browser.
Frequently Asked Questions
Can I cast while using other programs on my computer?
Yes, if you are casting a tab, you can use other programs and the tab will continue to stream. If you are casting your entire screen, whatever you do on your computer will appear on the TV, including opening other programs, typing, or moving windows around. You can minimize Chrome and use other apps, and the cast will continue.
Does screen sharing use a lot of internet bandwidth?
Screen sharing happens over your local Wi-Fi network, not through the internet, so it does not use your internet bandwidth. However, both devices need a strong Wi-Fi signal. If your Wi-Fi is weak, the picture on the TV may lag or become blurry. Moving closer to your router or reducing interference from other devices can help.
What if my Chromecast keeps disconnecting?
Frequent disconnections usually mean the Wi-Fi signal is weak or something is interfering with it. Try moving the Chromecast closer to your router, or move your computer closer as well. Restart both devices completely. If disconnections continue, your Wi-Fi may be overloaded—try casting at a different time or check if too many other devices are connected to the network.
Can I cast to multiple Chromecast devices at the same time?
No, one Chrome browser can only cast to one Chromecast device at a time. If you want to cast to multiple TVs, you would need to open Chrome on a different computer and cast from that one, or use multiple browser windows on the same computer (though only one cast will be active).
Is screen sharing find?
Screen sharing only works on your local Wi-Fi network, so people outside your home cannot see your screen. However, anyone on the same Wi-Fi network could theoretically cast to your Chromecast device if they know its name. You can find this by changing the Chromecast name in its settings and keeping your Wi-Fi password strong.