The basic steps to get your Chromecast online

To connect your Chromecast to WiFi, you plug it into a power source, open the Google Home app on your phone or tablet, tap the plus icon to add a device, select Chromecast, choose your WiFi network from the list, and enter your password. The whole process takes about five minutes. Your Chromecast will restart once or twice during setup, and you'll see a confirmation message in the app when it's connected.

The device itself doesn't have buttons or a screen—it's just a small dongle or box that connects to your TV's HDMI port. All the setup happens through the app on your phone, which talks to your Chromecast over a temporary connection while it's looking for a network to join.

Key Takeaways

  • You need the Google Home app installed on a phone or tablet running Android 6.0 or newer, or iOS 12.0 or newer, to set up your Chromecast.
  • Your phone must be on the same WiFi network you want your Chromecast to join during the setup process, but your Chromecast can use a different network afterward if you have multiple bands.
  • If your Chromecast doesn't appear in the app's device list, restart it by unplugging the power cable for 30 seconds, then plug it back in.
  • Once connected, your Chromecast stays on that network automatically—you only set it up once unless you move it to a different location or change your WiFi password.

What you need before you start

Have your WiFi password ready. You'll need to type it into the app during setup, and it must be the password for the network itself, not your router's admin password. If you're not sure what your WiFi password is, check the sticker on the back or bottom of your router, or log into your router's settings page through a web browser on your computer.

Make sure your phone or tablet is already connected to the WiFi network you want your Chromecast to use. The app needs to communicate with your Chromecast over that network during setup. If you're setting up a Chromecast for someone else's home, you'll need to be on their WiFi while you do it.

read the Google Home app if you don't have it. It's free from the Google Play Store (Android) or the Apple App Store (iOS). You don't need a Google account to set up a Chromecast, but you will need one if you want to use features like casting from your phone or setting up voice commands later.

Step-by-step setup in the Google Home app

Open the Google Home app and tap the plus icon in the top left corner. Select "Set up device," then choose "Set up new device." The app will ask whether you're setting up something for yourself or for someone else—pick the option that applies. On the next screen, select your Chromecast from the list of nearby devices. If you don't see it, make sure the Chromecast is plugged in and powered on.

The app will ask you to confirm that you see a four-digit code on your TV screen. This code appears on the Chromecast itself to prove you're setting up the right device. Once you confirm the code, the app will show you a list of WiFi networks. Tap the network you want to use, then enter the password. The Chromecast will connect and restart—this is normal and takes about a minute.

After the restart, the app will ask you to name your Chromecast (something like "Living Room" or "Bedroom") and assign it to a room in your home. You can skip this step if you want, but naming it makes it easier to find later if you have multiple Chromecasts. Once you see a "Setup complete" message, your Chromecast is ready to use.

Troubleshooting when your Chromecast won't connect

If your Chromecast doesn't show up in the app's device list, unplug it from power for 30 seconds, then plug it back in. Wait for the light on the device to stop blinking, which means it's finished restarting. Open the Google Home app again and try adding the device. If it still doesn't appear, make sure your phone is on the same WiFi network and that Bluetooth is turned on—the app uses Bluetooth to find nearby Chromecasts.

If you enter your WiFi password but the Chromecast won't connect, double-check that you typed the password correctly. Passwords are case-sensitive, so uppercase and lowercase letters matter. If the password is right, restart your router by unplugging it for 30 seconds, then plug it back in and try again. Some routers take a minute or two to fully restart.

If your Chromecast connects but then disconnects after a few minutes, your router may be dropping the connection. Check whether your router is set to a 5 GHz network only—older Chromecasts work better on 2.4 GHz networks. Log into your router's settings and look for a band or frequency option. If you have a choice, select "2.4 GHz" or "dual-band" mode, which lets devices pick the best frequency automatically.

What to do if you need to change your WiFi network

If you move your Chromecast to a new location or change your WiFi password, you'll need to reconnect it. Open the Google Home app, tap the device, then tap the settings icon (gear symbol) in the top right. Select "WiFi," then "Forget this network." The app will walk you through connecting to your new network using the same steps as the initial setup.

If you can't access the app because you're not on the same network as your Chromecast, you can factory reset the device by holding down the reset button (usually on the back or bottom) for about 15 seconds until the light starts blinking. Once it's reset, it will appear in the app again as a new device, and you can set it up from scratch.

When to call for help

If you've restarted both your Chromecast and your router, confirmed your WiFi password is correct, and the device still won't connect after 10 minutes, contact Google Support through the Google Home app. Tap your profile icon, then "Help & feedback," then "Contact us." They can walk you through more detailed troubleshooting or arrange a replacement if the device is defective.

If your Chromecast connects but your TV doesn't display anything, the problem is usually with the HDMI cable or port, not the WiFi. Try a different HDMI port on your TV, or swap in a different HDMI cable if you have one. If the TV still shows nothing, the Chromecast may need service—contact Google Support with your device's serial number, which you can find in the app under device settings.

Frequently Asked Questions

Can I connect my Chromecast to a 5 GHz WiFi network?

Newer Chromecast models support 5 GHz, but older ones only work on 2.4 GHz. Check your device's specifications in the Google Home app under device settings. If your router broadcasts both bands, select "dual-band" mode so your Chromecast can pick the best one automatically.

Do I need a Google account to set up Chromecast?

No, you can set up a Chromecast without a Google account. However, you'll need one if you want to cast from your phone, use voice commands, or set up routines. You can add an account after setup by opening the Google Home app and tapping your profile icon.

What if I forgot my WiFi password?

Check the sticker on the back or bottom of your router—the password is usually printed there. If the sticker is missing or unreadable, log into your router's settings page by typing your router's IP address (usually 192.168.1.1) into a web browser on your computer, then look for the WiFi or wireless settings section.

Can I use my Chromecast on a guest WiFi network?

Yes, you can connect your Chromecast to a guest network the same way you would a regular network. Just select the guest network name from the list during setup and enter its password. Keep in mind that some guest networks have restrictions that may affect casting performance.

Why does my Chromecast keep disconnecting from WiFi?

This usually happens if your router is dropping idle connections or if your Chromecast is too far from the router. Try moving the Chromecast closer to the router, or switch to a 2.4 GHz network if you're on 5 GHz. You can also log into your router settings and look for a power-saving or sleep mode option—disabling it may help.