The basic steps to get your Chromecast online

To connect your Chromecast to WiFi, you need the Google Home app on your phone or tablet, a WiFi network name and password, and your Chromecast plugged into power and an HDMI port on your TV. The process takes about five minutes and happens entirely through the app—you don't type anything into the Chromecast itself.

Start by opening the Google Home app, tapping the plus icon in the top left corner, and selecting "Set up device." Choose "Set up a new device" and let the app search for your Chromecast. When it finds it, tap the device name and follow the on-screen prompts. The app will ask you to confirm a four-digit code that appears on your TV screen, then ask which WiFi network you want to use and for that network's password. Once you enter the password correctly, your Chromecast connects and you're done.

Key Takeaways

  • You must use the Google Home app on a phone or tablet to set up WiFi—there is no way to do it directly on the Chromecast.
  • Your phone or tablet needs to be on the same WiFi network you want the Chromecast to join, or the setup will not work.
  • The four-digit code that appears on your TV screen is a security step to confirm you are setting up your own device, not someone else's.
  • If setup fails, restart your Chromecast by unplugging it for 30 seconds, then try again with the correct WiFi password.

What to do if your phone can't find the Chromecast

If the Google Home app doesn't see your Chromecast during setup, the most common cause is that your phone and Chromecast are not on the same WiFi network. Make sure your phone is connected to the network you want the Chromecast to use before you start the setup process. If you're using a guest network or a separate 5GHz band, switch to your main 2.4GHz network—older Chromecasts work better on 2.4GHz.

If your phone is on the right network and the app still doesn't find the device, unplug the Chromecast from power, wait 30 seconds, and plug it back in. Give it another 30 seconds to boot up, then open the Google Home app and try again. If it still doesn't appear, restart your WiFi router by unplugging it for 30 seconds as well. Once both devices have restarted, the app should find your Chromecast.

Fixing "incorrect password" errors during setup

When the Google Home app says your WiFi password is wrong, the problem is usually a typo or a password that contains special characters. WiFi passwords are case-sensitive, meaning capital letters matter. If your password has a space, apostrophe, or symbol like @ or &, type it exactly as it appears—don't guess or simplify it.

If you're not sure what your password is, you can find it on your router or in your router's admin page. On most routers, the password label is on the back or bottom of the device. If you've changed your password since you set up your router, use the current password, not the original one. After you enter the correct password, the Chromecast should connect within 30 seconds.

Connecting to a 5GHz or guest WiFi network

Newer Chromecasts support both 2.4GHz and 5GHz WiFi bands, but older models only work on 2.4GHz. If your router broadcasts both bands under the same network name, your phone may connect to 5GHz while your Chromecast tries to use 2.4GHz, and they won't be able to see each other during setup. The simplest fix is to temporarily connect your phone to the 2.4GHz band before you set up the Chromecast.

If you want to use a guest network instead of your main network, that works fine—just make sure your phone is on the guest network when you run the setup. Some guest networks have restrictions that prevent devices from talking to each other, so if your Chromecast connects but won't cast anything, switch it to your main network instead.

What to do if your Chromecast connects but then drops offline

If your Chromecast connects during setup but then goes offline a few minutes later, the problem is usually WiFi signal strength or interference. Move your Chromecast closer to your router, or move your router away from other electronics like microwaves and cordless phones that can interfere with WiFi. If your router is in a cabinet or closet, moving it to an open shelf often solves the problem.

If the signal is strong but your Chromecast still drops, restart both devices: unplug the Chromecast for 30 seconds, then unplug your router for 30 seconds, and plug them back in. Wait for both to fully boot up before trying to cast anything. If the problem continues, open the Google Home app, go to your Chromecast's settings, and select "Forget this device," then set it up again from the beginning.

Reconnecting an old Chromecast to a new WiFi network

If you've changed your WiFi network or password and your Chromecast no longer connects, you don't need to reset the device. Open the Google Home app, find your Chromecast in the device list, tap the settings icon (three dots), and select "Forget this device." Then set it up again using the same steps as a new Chromecast, and it will connect to your new network.

If your Chromecast doesn't appear in the Google Home app at all, it may have lost power or WiFi connection. Unplug it, wait 30 seconds, and plug it back in. Once it restarts, open the app and try to forget and re-add it. If you can't find it in the app even after a restart, you may need to factory reset it by holding the reset button on the device for 15 seconds while it's powered on.

Frequently Asked Questions

Do I need a Google account to set up Chromecast WiFi?

Yes. You need to be signed into a Google account in the Google Home app to set up your Chromecast. The account doesn't have to be the same one you use for other devices, but you do need one. If you don't have a Google account, you can create one for free at google.com.

Can I set up Chromecast on WiFi without a smartphone?

No. The Google Home app is only available on phones and tablets, so you need one of those devices to connect your Chromecast to WiFi. You cannot set up WiFi using a computer or by plugging anything into the Chromecast itself.

What if I don't know my WiFi password?

Check the label on the back or bottom of your router—most routers have the password printed there. If the label is missing or faded, log into your router's admin page by typing its IP address into a web browser (usually 192.168.1.1 or 192.168.0.1) and look for the WiFi password in the wireless settings. You'll need your router's admin username and password for this.

Will my Chromecast work on a 5GHz network?

Newer Chromecast models support 5GHz, but older ones only work on 2.4GHz. If your router broadcasts both bands under the same network name, connect your phone to the 2.4GHz band before setup to make sure your Chromecast can find it. Check your Chromecast's model number in the Google Home app settings to see which bands it supports.

What if my WiFi network doesn't show up in the app during setup?

If your network name doesn't appear in the list, it may be hidden. Select "Add a network" at the bottom of the list and type your network name manually, then enter your password. Make sure you spell the network name exactly as it is—it's case-sensitive.