How to connect Chromecast to WiFi in four steps

Chromecast connects to the internet through your home WiFi network, not through an HDMI cable or power cord. You set up the WiFi connection using the Google Home app on your phone or tablet — the device itself has no buttons or screen for this. Once you plug Chromecast into your TV's HDMI port and power it on, the Google Home app walks you through finding your WiFi network, entering your password, and confirming the connection.

The whole process takes about five minutes if your WiFi password is nearby and your phone is on the same network. If you get stuck, the most common problem is typing the password wrong — WiFi passwords are case-sensitive, so capital letters matter.

Key Takeaways

  • You need the Google Home app on a phone or tablet to set up Chromecast's WiFi connection; the device itself has no setup screen.
  • Chromecast must be plugged into both an HDMI port on your TV and a power outlet before you start the setup process.
  • Your phone must be on the same WiFi network as the Chromecast during setup, or the app will not find the device.
  • WiFi passwords are case-sensitive, so if setup fails, double-check that capital letters match exactly what your router requires.

What you need before you start

Have these three things ready: a Chromecast device, a TV with an available HDMI port, and a phone or tablet with the Google Home app installed. The Google Home app is free and works on both Android and iOS.

You also need access to your WiFi network name and password. If you do not know your password, you can find it on the back or bottom of your router — it is usually labeled "WiFi Password" or "Network Key". Some routers have a sticker with both the network name and password printed on it.

Your phone must be connected to the same WiFi network you want Chromecast to use. If your phone is on a different network or on cellular data, the Google Home app will not be able to find your Chromecast during setup.

Plug in Chromecast and open the Google Home app

Insert the Chromecast into an HDMI port on your TV. Most TVs have at least two HDMI ports, usually on the back or side. If all your ports are full, you can use an HDMI splitter or unplug another device temporarily.

Plug the power cable into the Chromecast and into a wall outlet or power strip. The Chromecast needs constant power to work — it cannot run on battery. A small LED light on the device will turn on when power is connected.

Open the Google Home app on your phone or tablet. If you do not have it installed, read it from the Google Play Store (Android) or the Apple App Store (iOS). When you open the app, you may be asked to sign in with a Google account — use the same account you want to use with Chromecast.

Find and add your Chromecast device

In the Google Home app, tap the plus sign (+) in the top left corner, then select "Set up device" or "Set up a new device". The app will search for nearby devices on your WiFi network.

When your Chromecast appears in the list, tap it to select it. The app will ask you to confirm that you see a code on your TV screen — this code appears on the Chromecast itself and matches what the app shows. This step confirms that you are setting up the right device and not someone else's Chromecast.

If you do not see a code on your TV, make sure the TV is turned on and set to the HDMI input where you plugged in the Chromecast. Use your TV remote to switch to that input if needed.

Enter your WiFi password and complete setup

The app will show you a list of WiFi networks it can detect. Find your network name in the list and tap it. If you do not see your network, make sure your router is turned on and within range of the Chromecast.

When you tap your network, the app will ask for the password. Type it exactly as it appears on your router — passwords are case-sensitive, meaning uppercase and lowercase letters are different. If you make a mistake here, setup will fail and you will have to start over.

After you enter the password, the app will connect Chromecast to your WiFi. This usually takes 30 seconds to two minutes. You will see a progress bar on your phone and on the TV screen. Once the connection is complete, the app will ask you to name your Chromecast (for example, "Living Room" or "Bedroom") so you can tell it apart from other devices in your home.

What to do if setup fails

If the app cannot find your Chromecast, make sure your phone is on the same WiFi network as the Chromecast. The app needs to communicate with the device over WiFi to set it up. If your phone is on a different network or on cellular data, the setup will not work.

If the connection drops after you enter the password, the most common cause is a typo in the password. Go back and try again, paying close attention to uppercase and lowercase letters. Some routers also have a separate 5GHz and 2.4GHz network — Chromecast works on both, but your phone must be on the same one you want Chromecast to use.

If your Chromecast is still not connecting after three attempts, restart your router by unplugging it for 30 seconds, then plugging it back in. Wait for it to fully restart (usually one to two minutes), then try the setup again.

Frequently Asked Questions

Can I set up Chromecast without the Google Home app?

No. The Google Home app is the only way to connect Chromecast to WiFi. Chromecast itself has no buttons, screen, or menu — all setup happens through your phone or tablet.

What if I do not have a Google account?

You need a Google account to use the Google Home app and set up Chromecast. You can create a free Google account at accounts.google.com. Once you have an account, sign in to the Google Home app and proceed with setup.

Can I use Chromecast on a guest WiFi network?

Yes, Chromecast can connect to a guest network. During setup, select the guest network from the list of available networks and enter its password. Keep in mind that if the guest network has different security settings, some streaming services may not work as expected.

Do I need to set up WiFi every time I use Chromecast?

No. Once Chromecast is connected to your WiFi, it remembers that network. The next time you turn it on, it will automatically reconnect to the same network without you having to enter the password again.

What if my WiFi network does not show up in the list?

Make sure your router is turned on and within 30 feet of the Chromecast. If your network name is hidden, you can manually enter it by selecting "Add network" or "Other network" at the bottom of the network list, then typing your network name and password.