Connect Your Chromecast to WiFi Before You Use It

Your Chromecast needs to be on the same WiFi network as your phone or computer to work. The setup takes about five minutes and happens on your TV screen — you'll see prompts that walk you through picking your network and entering your password. Once it's connected, you can cast videos, music, photos, and browser tabs from your devices to your TV.

You'll need three things: your Chromecast plugged into a TV HDMI port, your WiFi network name and password, and a phone or computer on the same network. If you're setting up a Chromecast Audio or an older Chromecast model, the steps are nearly identical.

Key Takeaways

  • Plug your Chromecast into an HDMI port on your TV and switch to that input before starting setup.
  • The setup screen appears on your TV automatically — you select your WiFi network and enter your password using your phone or computer.
  • Your phone or computer must be on the same WiFi network as your Chromecast during setup and whenever you want to cast.
  • If setup stalls, restart your Chromecast by unplugging it for 30 seconds, then plug it back in.
  • You can change your WiFi network later by holding the reset button on the Chromecast for 25 seconds until the light flashes.

Plug In Your Chromecast and Switch Your TV Input

Find an HDMI port on the back or side of your TV. Plug your Chromecast into that port — the device itself is small and rectangular, about the size of a car key fob. If your Chromecast came with a power cable, plug that into a nearby outlet or USB port. Some newer models draw power directly from the HDMI port and don't need a separate cable.

Pick up your TV remote and switch to the HDMI input where you plugged in the Chromecast. You'll usually see an "Input" or "Source" button on the remote. Press it and select the HDMI port number — if you're not sure which one, try each until you see the Chromecast setup screen appear on your TV. The screen will show a colorful Google logo and a setup code.

Open the Google Home App on Your Phone or Computer

On your phone, read the Google Home app from the Apple App Store or Google Play Store if you don't already have it. Open the app and sign in with your Google account — the same one you use for Gmail or YouTube. If you're setting up from a computer instead, go to home.google.com in your web browser and sign in there.

The app will search for nearby devices automatically. You should see your Chromecast appear in the list within a few seconds. If it doesn't show up, make sure your phone is on the same WiFi network as your TV, and that your Chromecast is powered on and showing the setup screen.

Select Your Chromecast and Confirm the Setup Code

Tap on your Chromecast in the Google Home app — it will have a name like "Living Room" or "Bedroom" unless you've already renamed it. The app will ask you to confirm a four-digit code. Look at the setup screen on your TV and read the code shown there, then enter it in the app. This step confirms that your phone is controlling the right device.

After you confirm the code, the app will move to the next step. This usually takes 10 to 15 seconds. If the code doesn't match or the app can't find your Chromecast, go back and make sure both devices are powered on and on the same network.

Choose Your WiFi Network and Enter Your Password

The Google Home app will now show you a list of WiFi networks it can see. Find your network name in the list and tap it. If your network doesn't appear, scroll down and select "Other network," then type your network name manually.

Enter your WiFi password exactly as it is — passwords are case-sensitive, so uppercase and lowercase letters matter. If you're not sure of your password, check the sticker on the back of your router, or open your phone's WiFi settings to see which network you're connected to. After you enter the password, tap "Connect" and wait 30 to 60 seconds while your Chromecast joins the network.

Name Your Chromecast and Finish Setup

Once your Chromecast connects to WiFi, the app will ask you to name it. You can call it "Living Room," "Kitchen," "Bedroom," or anything else that helps you remember which TV it's plugged into. This name appears in the app whenever you want to cast, so pick something clear if you have more than one Chromecast at home.

The app will then ask which room this Chromecast is in — this is optional but helpful if you use Google Home speakers or other smart home devices. After you finish, the setup screen on your TV will disappear and you'll see the Chromecast home screen, which shows the time, weather, and your photos. Your Chromecast is now ready to use.

What to Do If Setup Gets Stuck

If the setup screen doesn't appear on your TV, unplug your Chromecast for 30 seconds, then plug it back in. Wait for the Google logo to appear on your TV before opening the Google Home app again. If your phone can't find the Chromecast, move closer to your router — sometimes distance or walls block the connection during setup.

If you enter your WiFi password and the Chromecast can't connect, double-check that you typed it correctly. Passwords are case-sensitive and spaces count. If you're still stuck, restart your router by unplugging it for 30 seconds, then plug it back in and try setup again. If your router uses a 5 GHz network, try connecting to the 2.4 GHz band instead — older Chromecast models sometimes have trouble with 5 GHz.

Frequently Asked Questions

Can I set up Chromecast without the Google Home app?

No, you need either the Google Home app on a phone or the web version at home.google.com on a computer. The app is the only way to enter your WiFi password and complete setup. You can read it free from the Apple App Store or Google Play Store.

What if I don't have a Google account?

You need a Google account to set up Chromecast. Create one free at accounts.google.com. You'll use the same account to sign into the Google Home app. After setup is complete, other people can cast to your Chromecast without needing to sign in.

Can I use Chromecast on a 5 GHz WiFi network?

Newer Chromecast models support 5 GHz, but older ones only work on 2.4 GHz. If your router broadcasts both bands, try connecting to the 2.4 GHz network during setup. Check your router's manual or settings to see which bands it offers, or ask your internet provider.

Do I need to be on the same WiFi network every time I cast?

Yes, your phone or computer must be on the same WiFi network as your Chromecast whenever you want to cast. If you switch networks or go outside the range of your WiFi, you won't be able to cast until you reconnect to the same network.

How do I change my WiFi network after setup?

Hold the reset button on the back of your Chromecast for 25 seconds until the light flashes white. This erases the old network. Then open the Google Home app and go through setup again with your new network name and password.