What Google Cast Does and How to Start

Google Cast is the technology that lets you send video, music, or photos from your phone, tablet, or computer to a TV or speaker that has a Chromecast device plugged in. You don't need to buy a separate remote or learn new controls — you use the Cast button in apps you already have, like YouTube, Netflix, or Spotify, to push content to your screen.

To start casting, your phone or computer and your Chromecast device must be on the same Wi-Fi network. Once they are connected to the same network, open an app that supports casting (YouTube, Google Photos, Spotify, and hundreds of others), look for the Cast icon — it looks like a rectangle with curved lines in the bottom left corner — and tap it. A list of available devices appears. Select your TV or speaker, and the content starts playing there instead of on your phone.

The whole process takes about five seconds once you know where the button is. Your phone becomes a remote: you can pause, skip, or adjust volume from your device while the content plays on the big screen.

Key Takeaways

  • Google Cast works only when your phone, tablet, or computer and your Chromecast device are connected to the same Wi-Fi network.
  • The Cast button appears inside compatible apps like YouTube, Netflix, and Spotify — not on your phone's home screen.
  • Once you tap Cast and select your device, your phone controls the playback while the content plays on your TV or speaker.
  • You can cast from most Android phones, iPhones, iPads, Windows computers, and Mac computers to any device with Chromecast built in or plugged in.
  • If the Cast button does not appear in an app, that app does not support casting, and you will need to use a different method to watch on your TV.

Finding and Tapping the Cast Button in Apps

The Cast button location varies slightly by app, but it is always a small icon that looks like a rectangle with three curved lines in the bottom left corner. In YouTube, it sits in the top right of the video player. In Netflix, it is in the top right as well. In Spotify, it appears at the bottom of the now-playing screen. In Google Photos, it is in the top right corner of the app.

If you do not see the Cast button in an app you use regularly, that app does not support casting. Some streaming services, like Disney+ or Hulu, may require you to use their built-in casting feature instead of Google Cast, or they may not support casting at all on your device type. Check the app's settings or help section to confirm.

Once you tap the Cast button, a menu appears showing all Chromecast devices on your network. The device name appears as you named it during setup — for example, "Living Room TV" or "Kitchen Speaker". Tap the device you want to cast to, and the content moves to that screen within a few seconds.

Controlling Playback From Your Phone or Computer

After you cast, your phone or computer becomes a remote control. The playback controls stay on your device's screen: pause, play, skip forward, skip back, and volume adjustment all work from your phone while the video or music plays on your TV or speaker. You can also adjust the volume using your phone's physical volume buttons.

If you want to stop casting, tap the Cast button again and select "Stop Casting" or straightforward close the app. The content stops playing on your TV, and your phone returns to normal use. You can also unplug the Chromecast device or turn off the TV — the cast session ends automatically.

One useful feature: if someone else in your home wants to cast to the same device, they can do so from their own phone. The new content takes over the screen, and the previous cast stops. This is helpful in shared spaces, though it means anyone on your Wi-Fi can cast to your TV unless you password-protect your network.

Casting From Different Device Types

Google Cast works from Android phones, iPhones, iPads, Windows computers, and Mac computers. The process is the same on all of them: open a compatible app, tap the Cast button, and select your device.

On a computer, the Cast button appears in the same apps — YouTube in your browser, Spotify in the desktop app, and so on. Some web browsers, like Chrome, also let you cast an entire browser tab or your whole screen to a Chromecast device, which is useful if you want to show a website or presentation on your TV. To do this in Chrome, click the three-dot menu in the top right, select "Cast", and choose whether to cast a tab or your entire screen.

Casting from a computer screen is slower than casting video from an app, and the picture quality depends on your Wi-Fi speed. For watching video or listening to music, use the app's native Cast button instead of casting your whole screen.

Troubleshooting When Cast Does Not Work

If the Cast button does not appear in an app, first check that your phone and Chromecast device are on the same Wi-Fi network. Open your phone's Wi-Fi settings and confirm the network name. Then check that your Chromecast device is powered on and connected to the same network — you can do this in the Google Home app, which shows all your Chromecast devices and their connection status.

If both devices are on the same network and the Cast button still does not show up, restart the app. Close it completely and open it again. If that does not work, restart your phone. If the Cast button appears but selecting your device does nothing, restart your Chromecast device by unplugging it for 10 seconds and plugging it back in.

Some apps require you to be signed in to your account before casting works. For example, YouTube requires you to be signed in to your Google account, and Netflix requires you to be signed in to your Netflix account. If you are not signed in, the Cast button may not appear or may not work when tapped.

Casting Audio to Speakers and Multi-Room Playback

Google Cast works with speakers that have Chromecast built in, like Google Home speakers, JBL speakers, and many others. The process is identical to casting to a TV: open Spotify, YouTube Music, or another audio app, tap Cast, and select your speaker. Music plays on the speaker while you control it from your phone.

If you have multiple Chromecast devices in different rooms, you can cast to all of them at once from some apps. In Spotify, for example, you can select multiple speakers and play the same song in every room. This is called multi-room audio. Not all apps support this feature, so check your app's settings to see if the option is available.

You can also use the Google Home app to group speakers together and control them as one unit. This is useful if you want to play music in your living room and kitchen at the same time without opening multiple apps.

What to Do If Your App Does Not Support Casting

Some streaming services do not support Google Cast. If an app you want to use does not have a Cast button, you have a few alternatives. The simplest is to use a different app that does support casting — for example, if one music service does not support Cast, try another.

On Android phones, you can cast your entire screen to a Chromecast device, which lets you watch anything on your phone's screen appear on your TV. This is slower and uses more battery than casting from an app, but it works for any app. To do this, swipe down from the top of your screen twice to open Quick Settings, tap "Cast" or "Screen Cast", and select your device.

On iPhones and iPads, screen casting to Chromecast is not built in. You can use AirPlay to cast to an Apple TV instead, or look for a third-party app that supports casting to Chromecast.

Frequently Asked Questions

Do I need a Google account to use Google Cast?

You need a Google account to set up your Chromecast device the first time, but once it is set up, anyone on your Wi-Fi network can cast to it without signing in. Some apps, like YouTube and Google Photos, require you to be signed in to your account within the app before you can cast, but this is an app requirement, not a Chromecast requirement.

Can I cast if I am not home?

No. Google Cast requires your phone and Chromecast device to be on the same Wi-Fi network. If you are away from home, you cannot cast to a Chromecast at home. Some apps, like YouTube, offer a "remote" feature that lets you control playback on a device at home, but this is different from casting and requires setup in the app.

Does casting use a lot of data?

Casting uses Wi-Fi data, not cellular data. The video or audio streams from the internet to your Chromecast device over your home Wi-Fi, so it counts toward your home internet usage, not your phone's data plan. If you have a data cap on your home internet, casting will count toward it.

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

No. Only one person can cast to a device at a time. If someone else casts while you are already casting, their content takes over and yours stops. You can take turns casting, or use different Chromecast devices in different rooms.

What if my Wi-Fi is slow — will casting be choppy?

Casting video over a slow Wi-Fi connection can cause buffering or lower picture quality. If you experience this, move closer to your Wi-Fi router, reduce the number of devices using Wi-Fi at the same time, or restart your router. For the best experience, use a 5 GHz Wi-Fi network if your router supports it.