Casting from Chrome works through a built-in button that sends your browser tab or entire screen to a Chromecast device on the same Wi-Fi network

To cast from Chrome, you need three things: the Chrome browser on your computer or laptop, a Chromecast device plugged into your TV or speaker, and both devices connected to the same Wi-Fi network. The cast button lives in Chrome's menu — it is not always visible by default, but you can add it to your toolbar in seconds. Once you click it, you choose what to send (a single tab or your whole screen) and which device to send it to.

The process takes about 30 seconds from start to finish. You do not need to install anything extra or sign into a special account — if you are already logged into Chrome and your Chromecast is set up, you are ready to go.

Key Takeaways

  • The cast button is hidden by default in Chrome; you add it to your toolbar through the menu, then it stays there for future use.
  • You can cast a single browser tab (so other tabs stay private on your computer) or your entire screen (so everything you do appears on the TV).
  • Both your computer and Chromecast must be on the same Wi-Fi network, but you do not need to be on the same network as anyone else in your home.
  • Casting stops the moment you close the tab or disconnect; there is no lingering connection after you stop.

Add the Cast Button to Your Chrome Toolbar

Open Chrome and click the three vertical dots in the top right corner. This opens Chrome's main menu. Scroll down and look for "Cast" — it will have a small TV icon next to it. Click on "Cast".

The first time you click it, a small window pops up showing your available Chromecast devices. If you do not see your device, check that it is plugged in, powered on, and connected to the same Wi-Fi network as your computer. After you click "Cast" once, the cast button (a small TV icon) appears permanently in your Chrome toolbar, to the left of the address bar. From then on, you can click it directly without opening the menu.

Cast a Single Tab to Your TV

Click the cast button in your toolbar. A window appears listing all Chromecast devices on your network. Select the device you want to send to — it will show the device name (for example, "Living Room TV" or "Kitchen Speaker").

At the top of the window, make sure "Cast tab" is selected. This sends only the current browser tab to your TV; everything else on your computer screen stays private. Once you click the device name, the tab content appears on your TV within a few seconds. The tab continues to play on your TV even if you switch to a different tab on your computer — the cast runs independently.

To stop casting, click the cast button again and select "Stop casting" from the window that appears. The content disappears from your TV when ready.

Cast Your Entire Screen Instead of Just a Tab

Click the cast button and select your device as usual. Before you click the device name, look at the top of the window and click "Cast entire screen" instead of "Cast tab". This sends everything on your monitor to the TV — every window, every notification, every keystroke you make.

Screen casting is useful when you want to show someone a presentation, walk through a document, or play a game that is not in a browser. The downside is that your computer screen and TV screen are now identical, so anything you do (including opening private tabs or checking email) appears on the TV. To switch back to casting just a tab, click the cast button, select the device, and choose "Cast tab" again.

Troubleshoot When Your Device Does Not Appear

If you click the cast button and your Chromecast device does not show up in the list, check these things in order. First, make sure your Chromecast is plugged in and powered on — look for a light on the device itself. Second, confirm that both your computer and Chromecast are connected to the same Wi-Fi network. You can check your computer's Wi-Fi in the system tray (bottom right on Windows, top right on Mac); your Chromecast's network is shown in the Google Home app on a phone or tablet.

If both are on the same network and the device still does not appear, restart your Chromecast by unplugging it for 10 seconds and plugging it back in. Wait 30 seconds for it to fully boot, then try the cast button again. If it still does not work, restart your computer's Wi-Fi by turning Wi-Fi off and back on in your system settings, then try once more.

What Happens to Audio When You Cast

When you cast a tab, the audio plays through your TV or speaker, not through your computer. This is true whether you are casting a video, a music streaming site, or a video call. Your computer's speakers stay silent while the Chromecast device handles all the sound.

If you want audio to come from your computer instead, you can mute the tab in Chrome by right-clicking on the tab and selecting "Mute site". This stops the audio from going to the Chromecast, but the video or content still appears on your TV without sound — useful if you want to watch something on the TV while listening through headphones on your computer.

Cast From Your Phone or Tablet Instead

Casting from a phone or tablet works the same way as casting from Chrome on a computer, but the button location is different. On Android, open the app you want to cast (YouTube, Netflix, Chrome, or any other app that supports casting), then tap the cast icon — it looks like a rectangle with a Wi-Fi symbol in the corner. On iPhone or iPad, the cast button is usually in the app's menu or settings, labeled "AirPlay" or "Cast".

Not every app supports casting. YouTube, Netflix, Google Photos, and most Google apps do. Smaller apps may not. If you do not see a cast button in an app, that app does not support it. In that case, you can cast your entire phone screen instead by opening Chrome on your phone, clicking the cast button, and selecting "Cast screen" — though this drains your phone's battery faster than casting from a computer.

Frequently Asked Questions

Can I cast if my computer and Chromecast are on different Wi-Fi networks?

No. Both devices must be on the same Wi-Fi network to communicate. If your computer is on your home network and your Chromecast is on a guest network, casting will not work. Switch both to the same network and try again.

Does casting use a lot of internet bandwidth?

Casting a tab uses the same bandwidth as watching the content on your computer would use — the Chromecast is just displaying what your computer sends. If you are streaming video, the video data travels over your Wi-Fi either way. Casting does not use extra bandwidth beyond what the content itself requires.

What if I close my laptop while something is casting?

Closing your laptop stops the cast when ready. The content disappears from your TV. If you want to keep something playing on your TV while you step away, you need to leave your computer awake and the tab open. Putting your computer to sleep also stops the cast.

Can multiple people cast to the same Chromecast at the same time?

No. Only one device can cast to a Chromecast at a time. If someone else tries to cast while you are already casting, their device will take over and your cast will stop. The Chromecast will then display what the second person is sending.

Do I need a Google account to cast from Chrome?

You do not need to sign into a Google account to cast. If you are already signed into Chrome, casting works. If you are not signed in, casting still works — you just will not have access to your Chrome bookmarks or saved passwords on that computer.