The fastest wireless connection depends on what you own

The easiest method is usually the one built into both your PC and TV already. If your TV is made in the last five years and your PC runs Windows 10 or later, you likely have Miracast — a wireless standard that mirrors your screen without needing a separate app or login. If you have an Apple computer, AirPlay works the same way to most modern TVs. Both work at the push of a button once you set them up the first time.

If Miracast or AirPlay aren't available on your TV, a streaming device like a Roku, Amazon Fire Stick, or Google Chromecast plugs into your TV's HDMI port and handles the wireless connection for you. These cost between $25 and $100 and work with almost any PC. They're also the most reliable option if you plan to use the connection regularly.

A third option is HDMI over WiFi — a dedicated wireless adapter that replaces the cable. These are less common now because Miracast and streaming devices work better, but they exist if you need them.

Key Takeaways

  • Windows PCs and most modern TVs support Miracast, which mirrors your screen wirelessly without extra hardware.
  • Mac computers use AirPlay, which works with most TVs made after 2018 but requires the TV to support it.
  • A streaming device like Roku or Fire Stick plugged into your TV's HDMI port is the most reliable option if your TV doesn't have built-in wireless support.
  • The first wireless connection usually takes a few minutes to set up; after that, connecting takes seconds.
  • All wireless connections work best when your PC and TV are on the same WiFi network and within 30 feet of each other.

Using Miracast on Windows

To check if your TV supports Miracast, look in your TV's settings menu for "Miracast," "Screen Mirroring," or "Wireless Display." If you find it, turn it on. Then on your Windows PC, press the Windows key and the letter K at the same time. A panel will open on the right side of your screen labeled "Connect." Click it.

Your TV should appear in the list within a few seconds. Click your TV's name. Windows will ask your TV to accept the connection — you may see a prompt on your TV screen. Accept it. Your PC screen will then appear on your TV. The first time you do this, Windows may ask you to confirm the connection is find; just click "Yes."

If your TV doesn't appear in the list, make sure both devices are on the same WiFi network. If they are and your TV still doesn't show up, your TV may not support Miracast. Check your TV's manual or the manufacturer's website to confirm.

Using AirPlay on Mac

AirPlay works on Mac computers running macOS 10.15 or later, but your TV must support it. Most LG, Samsung, Sony, and Vizio TVs made after 2018 have AirPlay built in. To check, look in your TV's settings for "AirPlay" or "Apple AirPlay."

Once your TV has AirPlay turned on, click the Control Center icon (looks like a rectangle with lines) in the top-right corner of your Mac screen. Click "Screen Mirroring." Your TV should appear in the list. Click it. Your Mac screen will appear on your TV within a few seconds.

If your TV doesn't support AirPlay, you can still use a streaming device that does — most modern Roku, Fire Stick, and Apple TV devices support AirPlay.

Setting up a streaming device

A streaming device is a small box that plugs into your TV's HDMI port and connects to your WiFi. The most common are Roku, Amazon Fire Stick, Google Chromecast, and Apple TV. All of them work with both Windows and Mac.

Plug the device into an available HDMI port on your TV and turn on the TV. The device will walk you through setup on your TV screen — you'll connect it to your WiFi and sign in with your account (if the device requires one). Once setup is done, you can cast to it from your PC. On Windows, open the app or website you want to cast, look for a "Cast" button, and click it. On Mac, use AirPlay if the device supports it, or use the device's own app.

Streaming devices are more reliable than Miracast for everyday use because they don't depend on your TV's wireless hardware. They also let you cast video, music, and photos from your phone to the same TV, which Miracast doesn't always do smoothly.

Troubleshooting a wireless connection that won't start

If your PC and TV won't connect, start by checking that both are on the same WiFi network. Open your PC's WiFi settings and your TV's network settings and confirm they're connected to the same network name. If they're on different networks, connect them to the same one and try again.

Next, restart both devices. Turn off your TV completely, unplug it for 10 seconds, and plug it back in. Restart your PC. Then try connecting again. This fixes most connection problems.

If the connection still fails, check that your TV's wireless display or AirPlay feature is actually turned on. Some TVs turn this off by default or disable it after a timeout. Go into your TV's settings, find the wireless display or AirPlay option, and make sure it's set to "On" or "Always On."

If you're using a streaming device, make sure it's plugged into power and that the HDMI cable is fully seated in both the device and the TV. Unplug the device for 10 seconds and plug it back in. If it still won't work, check the device's app or website for a firmware update — outdated software sometimes breaks casting.

When to use a wired HDMI cable instead

Wireless connections are convenient, but they're not always the best choice. If you're gaming or watching a movie and you need the lowest possible delay, a wired HDMI cable is faster and more stable. Wireless connections can have a lag of 100 to 300 milliseconds, which you'll notice in fast-paced games or when you're typing and watching the cursor on the TV.

If your PC is far from your TV — more than 30 feet away — or if there are thick walls between them, a wired connection is more reliable. WiFi signal weakens through walls and distance, and wireless display standards like Miracast are sensitive to interference from other devices on your network.

For one-time use or occasional presentations, wireless is fine. For daily use, gaming, or video work, run an HDMI cable if you can.

Frequently Asked Questions

Do I need to be on WiFi to use Miracast or AirPlay?

Yes, both your PC and TV must be on the same WiFi network. They don't need internet access — they just need to be able to see each other on your home network. If your WiFi is down, the connection won't work.

Can I use my PC while the screen is mirrored to the TV?

With Miracast and AirPlay, whatever you do on your PC appears on the TV in real time. You can't show different things on each screen. Streaming devices work the same way — they mirror or cast, not extend. If you want to use your PC while something else plays on the TV, you need a wired HDMI cable and to set the TV as a second display in your PC's display settings.

Why is my wireless connection so slow or laggy?

Wireless display standards like Miracast compress video to send it over WiFi, which can cause lag or pixelation, especially over distance. Walls, microwaves, and other WiFi networks nearby also interfere. Move closer to your router, make sure no one else is using heavy bandwidth, or use a wired HDMI cable if lag bothers you.

What if my TV is too old to support Miracast or AirPlay?

A streaming device like Roku or Fire Stick will work with any TV that has an HDMI port, regardless of age. Plug it in, set it up, and cast to it from your PC the same way you would with a newer TV.

Can I connect multiple PCs to the same TV wirelessly?

Yes, but only one at a time. You can switch between PCs by disconnecting one and connecting another, which usually takes 10 to 20 seconds. If you need to show content from two PCs at once, you need two HDMI inputs and a wired cable for each.