The basic connection: what Chromecast actually does

Chromecast is not Bluetooth. It connects your phone, tablet, or computer to a TV through your home WiFi network instead of a direct wireless link. When you "cast" something — a video, a photo, your entire screen — you are telling your device to send that content to the Chromecast receiver plugged into your TV. The Chromecast then pulls the stream directly from the internet or from your home network, not from your phone. This is why you can turn your phone off or use it for something else and the video keeps playing on the TV.

Your phone and the Chromecast need to be on the same WiFi network to find each other. Once they are, the connection happens automatically when you cast — you do not pair them once and then they stay paired the way Bluetooth devices do. Every time you cast, your phone and the Chromecast talk to each other fresh.

Key Takeaways

  • Your phone, tablet, or computer and your Chromecast must be connected to the same WiFi network before you can cast anything.
  • Casting is not the same as pairing — you do not set up a permanent connection; instead, your device finds the Chromecast each time you cast.
  • The cast button appears in apps like YouTube, Netflix, and Google Photos, or you can cast your entire screen from your device's settings.
  • If your Chromecast does not appear in the cast menu, restart both your Chromecast and your phone, then check that they are on the same WiFi network.

Setting up your Chromecast for the first time

Plug the Chromecast into an HDMI port on your TV and plug the power cable into a wall outlet or USB port. Turn on your TV and switch to the HDMI input where you plugged in the Chromecast. You should see a setup screen appear on the TV that shows a code and asks you to visit a website on your phone.

On your phone or tablet, open a web browser and go to the URL shown on the TV screen. This will walk you through connecting the Chromecast to your WiFi network. You will select your WiFi name from a list, enter your WiFi password, and give the Chromecast a name (like "Living Room TV"). Once this is done, the Chromecast is ready to receive casts from any device on that same network.

If you have a newer Chromecast with Google TV, the setup is slightly different — the remote that comes with it will guide you through WiFi connection directly on the TV screen. Either way, the end result is the same: your Chromecast is now on your WiFi network and ready to be found by your devices.

How to cast from your phone or tablet

Open any app that supports casting — YouTube, Netflix, Google Photos, Spotify, and many others all have the cast button built in. Look for an icon that looks like a rectangle with WiFi waves in the corner (usually in the top right or bottom right of the app). Tap that icon and a menu will appear showing all the Chromecast devices on your network.

Select the Chromecast you want to cast to. The content will when ready start playing on your TV, and you can control it from your phone — pause, rewind, adjust volume, or stop the cast. Your phone screen can go dark or you can switch to another app; the video will keep playing on the TV because the Chromecast is streaming directly, not pulling from your phone.

If you do not see a cast button in an app, that app does not support Chromecast. As an alternative, you can cast your entire phone screen to the TV. On Android, go to Settings, then Display, then Cast (or look for "Screen Cast" or "Wireless Display"). On iPhone, swipe down from the top right to open Control Center, tap Screen Mirroring, and select your Chromecast. This sends everything on your screen to the TV, though it uses more battery and can be slower than casting from within an app.

Casting from a computer or laptop

If you are using Google Chrome as your browser, casting is built in. Click the three-dot menu in the top right corner of Chrome, then select "Cast". A window will open showing all available Chromecast devices. Click the one you want to cast to.

You have two options: cast a single tab (which sends just that browser tab to the TV) or cast your entire screen (which sends everything on your monitor). Casting a tab is usually better because you can keep working on your computer without the TV showing everything you do. To stop casting, click the Cast button again and select "Stop casting".

If you are not using Chrome, you can still cast your screen on Windows 10 and later. Press the Windows key and the K key together, then select your Chromecast from the list. On Mac, you cannot cast directly to Chromecast without using Chrome or a third-party app, though you can use AirPlay to an Apple TV instead.

Troubleshooting when your Chromecast does not appear

The most common reason your Chromecast does not show up in the cast menu is that your phone or computer is on a different WiFi network than the Chromecast. Check your device's WiFi settings and make sure you are connected to the same network name (SSID) that you used when you set up the Chromecast. If you have a 5GHz and 2.4GHz network with the same name, try connecting to the 2.4GHz one — some Chromecasts work better on that band.

If you are on the right network, restart both devices. Unplug the Chromecast from power for 10 seconds, then plug it back in. At the same time, restart your phone or computer. Once both are back online and on the same network, open the casting app again and look for the Chromecast. It should appear within 30 seconds.

If the Chromecast still does not appear, check whether your WiFi network requires you to log in through a web page (common in hotels and offices). Chromecast cannot connect to networks that require this kind of login. You may need to use a personal hotspot from your phone instead, or ask your network administrator whether there is a guest network available.

What to do if casting keeps stopping or stuttering

Chromecast streams over WiFi, so a weak signal or interference can cause the video to pause or buffer. Move closer to your WiFi router, or move the router closer to the TV. If you have a lot of devices on your network, try disconnecting some of them temporarily to free up bandwidth.

If the problem persists, restart your router by unplugging it for 30 seconds. You can also try "forgetting" the Chromecast from your phone's WiFi settings and reconnecting to it — sometimes this clears up connection issues. On Android, go to Settings > WiFi, long-press your network name, and select "Manage". On iPhone, go to Settings > WiFi, tap the info icon next to your network, and select "Forget This Network". Then reconnect by selecting the network again and entering your password.

Casting from multiple devices at once

Only one device can cast to a Chromecast at a time. If someone else tries to cast while you are already casting, their cast will take over and yours will stop. Some Chromecast models have a feature called "Guest Mode" that lets visitors cast without being on your WiFi network, but this is not available on all models.

If you want multiple people to be able to cast, you can set up multiple Chromecasts in different rooms. Each one connects to your WiFi independently and shows up as a separate device in the cast menu. You can also use a Chromecast Audio (now discontinued but still available used) or a speaker with Chromecast built in to cast music to different rooms.

Frequently Asked Questions

Do I need to pair my phone with Chromecast like I do with Bluetooth speakers?

No. Pairing is not required. Your phone and Chromecast just need to be on the same WiFi network. When you tap the cast button, your phone finds the Chromecast automatically. You do not set up a permanent connection the way you do with Bluetooth.

Can I cast if I am not on the same WiFi as my Chromecast?

Not directly. Your device and Chromecast must be on the same network. However, if your Chromecast supports Guest Mode, visitors on a different network can cast to it. Check your Chromecast model to see if this feature is available.

What happens to my phone while something is casting?

Your phone can do anything — switch apps, lock the screen, or turn off. The Chromecast streams directly from the internet or your home network, not from your phone. You can use your phone to control playback (pause, rewind, volume), but the video keeps playing even if your phone is in your pocket.

Why does casting work in some apps but not others?

Casting support depends on whether the app developer built it in. YouTube, Netflix, Spotify, and Google Photos support it. Some smaller apps or older apps do not. If an app does not have a cast button, you can cast your entire screen instead, though this is slower and uses more battery.

Can I cast from my iPad or Mac?

iPad works the same way as iPhone — look for the cast icon in apps that support it, or use Screen Mirroring from Control Center. On Mac, you can cast from Chrome by clicking the three-dot menu and selecting Cast. Other browsers and apps on Mac do not have built-in Chromecast support.