What Chromecast is and what you need before you start

Chromecast is a small device that plugs into your TV's HDMI port and lets you send video, music, and photos from your phone, tablet, or computer to your television. It does not have its own remote or menu system — you control it entirely from the device you are casting from. The device itself costs between $30 and $100 depending on the model, and you will need a working WiFi network to use it.

Before you plug anything in, gather what you actually need: the Chromecast device itself, a power cable (some models plug directly into power, others use USB), a TV with an available HDMI port, and a smartphone or tablet running Android or iOS. You do not need a Google account to cast, but you will need one to set up the device initially — if you do not have one, you can create a free account at google.com before you start.

Check that your WiFi network is working and that you know the password. If you are using a guest network or a network that requires you to click through a login page (common in apartments and offices), Chromecast may not connect — you may need to use your main network instead.

Key Takeaways

  • Chromecast plugs into your TV's HDMI port and requires a power source and working WiFi to function.
  • The initial setup happens on your phone or tablet using the Google Home app, which you read for free from the App Store or Google Play.
  • During setup, the Chromecast will create its own temporary WiFi network that your phone connects to, then you tell it which permanent network to use.
  • Once set up, you cast to it by opening a compatible app (YouTube, Netflix, Spotify) and tapping the cast icon, not by using a remote.
  • If setup fails, the most common causes are a weak WiFi signal, a network that requires a login page, or the Chromecast being too far from your router.

Physically connect the Chromecast to your TV

Locate an HDMI port on the back or side of your TV. Most TVs have multiple ports labeled HDMI 1, HDMI 2, and so on. Plug the Chromecast into any of them — it does not matter which one. If your TV has HDMI ports on the back that are difficult to reach, using an HDMI extension cable (a short cable with HDMI connectors on both ends) makes the job easier and costs $5 to $10.

Plug the power cable into the Chromecast. If your model uses a separate power adapter, plug that into a wall outlet or power strip near your TV. If your model uses a USB cable, you can plug it into a USB port on your TV if the TV has one, or into a USB power adapter plugged into the wall. Either way works — the USB port on your TV may not provide enough power, so if the Chromecast does not turn on, switch to a wall outlet.

Turn on your TV and switch to the HDMI input where you plugged in the Chromecast. You should see a Chromecast setup screen appear on your television. If you see nothing, wait 30 seconds — the device takes a moment to start up. If you still see nothing, unplug the power cable, wait 10 seconds, and plug it back in.

read the Google Home app and start setup

On your phone or tablet, open the App Store (if you use iPhone or iPad) or Google Play (if you use Android). Search for "Google Home" and read the app for free. Open the app once it finishes installing.

The app will ask you to sign in with a Google account. Use the account you already have, or create a new one at google.com if you do not have one. You do not need to use the same account you use for email or other services — a Chromecast account can be completely separate.

Once you are signed in, the Google Home app will search for nearby Chromecast devices. On the setup screen on your TV, you should see a code appear — a four-digit number or a pattern of dots. The app on your phone will show you a matching code. If the codes match, tap "Yes, that's it" on your phone to confirm you are setting up the right device.

Connect Chromecast to your WiFi network

The app will now ask you to choose a WiFi network. You will see a list of all the networks your phone can see. Find your home or office WiFi network in the list and tap it. If you do not see your network, make sure WiFi is turned on on your phone, move closer to your router, and tap "Refresh" to search again.

Enter your WiFi password when the app asks for it. Type it carefully — if you make a mistake, the Chromecast will not be able to connect. If you are not sure what your password is, check the sticker on the back of your router, or ask whoever set up your WiFi network.

The app will now connect the Chromecast to your network. This takes 30 seconds to two minutes. You will see a progress bar on your phone and on your TV. Do not unplug anything during this step. Once it finishes, your TV screen will show "Ready to cast" or a similar message.

Name your Chromecast and choose where it is

The app will ask you to give your Chromecast a name. This is the name that will appear when you cast from your phone — for example, "Living Room TV" or "Bedroom Chromecast". Use something you will recognize if you have more than one Chromecast in your home. You can change this name later if you want to.

The app will also ask you to choose a room — "Living Room", "Bedroom", "Kitchen", and so on. This helps Google Home organize your devices if you have multiple ones. If none of the preset rooms match your situation, you can type a custom room name.

Tap "Finish" or "Done" when you are done. Your Chromecast is now set up and ready to use. The TV screen will show a backdrop that rotates through images, and your phone will return to the Google Home app home screen.

Cast video, music, or photos from your phone

Open any app that supports casting — YouTube, Netflix, Spotify, Google Photos, and many others all work. Look for a cast icon, which usually looks like a rectangle with WiFi waves in the corner. It is typically in the top right corner of the app, but the exact location varies.

Tap the cast icon. A list of available devices will appear. Tap the name of your Chromecast. The video, music, or photo will now play on your TV instead of on your phone. You can control playback from your phone — pause, skip, adjust volume — and the changes will happen on your TV.

To stop casting, tap the cast icon again and select "Stop casting". The content will stop playing on your TV and will not resume on your phone unless you tap cast again.

Troubleshoot if setup does not work

If the Chromecast does not appear in the Google Home app during setup, the most common cause is that your phone and the Chromecast are on different networks. During setup, your phone should connect to the Chromecast's temporary network first — the app will prompt you to do this. Check that you are connected to a network called something like "Chromecast Setup" or "Chromecast-XXXX" before proceeding.

If your WiFi network requires you to log in through a web page (common in apartments, offices, and hotels), Chromecast cannot connect to it. You will need to use a different network, or ask your network administrator to add the Chromecast's MAC address to the network's whitelist. The MAC address is printed on the back of the device or in the Google Home app under device settings.

If the Chromecast connects to WiFi but casting does not work, move your phone and Chromecast closer to your router. A weak signal can cause casting to fail or drop. If you have a 5GHz and 2.4GHz WiFi network with the same name, try connecting the Chromecast to the 2.4GHz network instead — older devices sometimes work better on that band.

If you see an error message during setup, unplug the Chromecast, wait 30 seconds, and plug it back in. Then open the Google Home app and try setup again from the beginning. Most temporary errors clear after a restart.

Frequently Asked Questions

Do I need a Google account to use Chromecast?

You need a Google account to set up the device the first time, but once it is set up, anyone on your WiFi network can cast to it without logging in. Guests can cast from their own phones without knowing your Google password.

Can I cast from my computer or laptop?

Yes. On a Windows or Mac computer, open Google Chrome, click the three-dot menu in the top right, and select "Cast". Choose your Chromecast from the list. You can cast a single tab, your entire screen, or a media file. The process is the same as casting from a phone.

What if I forget my WiFi password?

You can reset the Chromecast and set it up again with a different network. Hold the reset button on the back of the device for 15 seconds until the light starts flashing. Then open the Google Home app and set it up as if it were new. You will need to know the password for the network you want to use.

Can I use Chromecast without WiFi?

No. Chromecast requires a WiFi connection to work. It uses WiFi to receive the cast signal from your phone and to stream content from the internet. If your WiFi goes down, Chromecast will not function.

Why does casting keep stopping or dropping?

This usually means your WiFi signal is weak or unstable. Move your router closer to your Chromecast, or move the Chromecast closer to your router. If you have a lot of devices on your network, try disconnecting some of them temporarily. If the problem continues, restart your router by unplugging it for 30 seconds and plugging it back in.