Stream your computer screen to your TV via Wi-Fi

Modern technology makes it easy to get rid of unnecessary wires and enjoy content on a big screen. Screencasting — This feature turns your laptop or PC into a powerful multimedia center that controls your TV. You no longer need to search for HDMI cables or drag long cords across the room to show a presentation or play a movie.

The basis of this process is wireless connection, which is based on Wi-Fi Direct or local network standards. The computer and TV exchange data directly or through a router, transmitting video and audio in real time. Image quality depends on the channel's bandwidth, but modern standards ensure stable transmission even at high resolutions. 4K.

In this guide, we'll cover all the setup details for different operating systems and TV types. You'll learn how to activate Miracast on Windows, use AirPlay on macOS and configure third-party applications for maximum device compatibility.

Wireless video transmission technologies

Before you begin setting things up, it's important to understand the protocols, as not all devices understand each other the same way. The most common standard for Windows and Android is MiracastThis technology allows you to create a direct connection between devices without a router using Wi-Fi Direct. If your TV supports this feature, it's often labeled as "Screen Share" or "Wireless Monitor."

For technology users Apple the de facto standard is the protocol AirPlayIt provides high stability and transmission quality, but requires a corresponding module in the TV (often found in recent Samsung, LG, and Sony models) or an Apple TV set-top box. Unlike Miracast, AirPlay can work over a shared Wi-Fi network, not just a direct connection.

There is also technology Google Cast (Chromecast built-in), which is built into many Smart TVs. It works differently: instead of mirroring the entire screen, you send the TV a link to the content, and the TV downloads it from the internet. However, the "Cast Chrome Tab" feature also allows you to mirror the contents of your browser desktop.

⚠️ Note: Support for specific protocols depends on the TV's year of manufacture and operating system version. If your model is several years old, the built-in receiver may not support the latest codecs, and you will need to use external adapters.

The choice of method is often dictated by the ecosystem. If you have Windows 10/11, the system will automatically suggest the most suitable option. For macOS, the situation is similar, but with an emphasis on Apple products. Understanding the difference between these technologies will help avoid confusion when searching for a device in the list of available devices.

Preparing equipment and network

Successful streaming is impossible without properly prepared infrastructure. The most important requirement is that both devices must be on the same local network. This means the computer and TV must be connected to the same router. If you're using a guest Wi-Fi network or client isolation on the router, the devices simply won't see each other.

It is recommended to use a range 5 GHzIf your router supports dual-band operation, this frequency range is less congested and provides higher data transfer rates, which is critical for high-definition video streaming. The 2.4 GHz band is often congested with neighboring networks and Bluetooth devices, which can cause lag or image artifacts.

• 📶 Make sure your computer's Wi-Fi adapter is working properly and its drivers are up to date.
• 📺 Check if the signal reception function on your TV (often called Screen Mirroring) is enabled.
• 🔌 Disable the VPN on your computer, as it may be hiding your device from the local network.
• 🔄 Update your Smart TV firmware to the latest version via the settings menu.

It's also worth checking your computer's firewall settings. Sometimes antivirus software can block incoming connections, considering the TV's connection attempt suspicious activity. In such cases, you'll need to grant permission for the device discovery service.

Setting up broadcasting in Windows 10 and 11

Windows operating systems have built-in support for Miracast technology, making the process much easier. You don't need to install any additional software if your computer and TV are relatively new. To get started, open the Action Center by pressing the key combination. Win + A, and select the "Project" (or "Connect") button.

The system will begin searching for available wireless displays. If the TV is in standby mode, it will appear in the list. After selecting a device, Windows will establish a connection, and the desktop image will be mirrored on the large screen. In the projection control menu, you can select the operating mode: mirror, extend, or use the TV as a second monitor.

For more fine-tuning, click Win + Kto bring up the connection panel again, or go to Settings → System → Display → Multiple displays → Connect to a wireless displayHere you can adjust the resolution and refresh rate if the picture appears blurry or jerky.

⚠️ Important: If the search returns no results, check the "SSDP Discovery Service" service in Windows. It must be running and in automatic mode, otherwise the system will not be able to find external devices.

What should I do if my Wi-Fi driver doesn't support Miracast?

Some older laptops have built-in Wi-Fi modules that don't support Wi-Fi Direct, which is required for Miracast. In this case, you can try updating the drivers from the manufacturer's website or using an external USB Wi-Fi adapter that supports this technology. Software emulators are also available, but they often put a strain on the processor.

It's important to note that when streaming over Wi-Fi, you may experience a slight delay in the mouse cursor. This isn't a problem for office work or video viewing, but it's not suitable for fast-paced gaming due to the limited bandwidth of the wireless channel.

Using AirPlay on macOS and Apple TV

Mac users can take advantage of the native AirPlay feature. This protocol provides excellent synchronization and high image quality. Make sure your TV supports it. AirPlay 2 (many Samsung, LG, Vizio and Sony models have this feature out of the box) or you have an Apple TV connected.

To start casting, click the Control Center icon in the menu bar (the icon with two switches) and select "Screen Mirroring." Select your TV from the list that appears. If prompted, enter the verification code that appears on the TV screen. Your Mac desktop will then be mirrored on the big screen.

In the AirPlay settings, you can select the resolution and frame rate. For watching movies, it's best to select a mode that matches the TV's native display resolution to avoid unnecessary scaling. You can also use the TV as a separate desktop, rather than a mirror of the main screen.

It's worth keeping in mind that AirPlay encrypts the transmitted stream, which ensures data security but may require slightly more network resources. If the connection is interrupted, try rebooting your router, as multicast packets used for device discovery are sometimes lost when network equipment is running for a long time.

Alternative methods and applications

If built-in tools don't work or your TV is a "regular" one (not a Smart TV), third-party solutions can help. One of the most popular methods is using a browser. Google ChromeIn the browser menu (the three dots in the corner), select "Cast." This feature allows you to send a browser tab or your entire desktop to your TV if you have a Chromecast or Google Cast-enabled TV.

For TVs without Smart functions, you can use media players connected via HDMI, such as Chromecast, Amazon Fire Stick or Xiaomi Mi StickThese devices transform any HDMI-equipped screen into a fully-fledged Smart TV with support for modern broadcast protocols. They connect to Wi-Fi and are controlled from a smartphone or PC.

• 📡 LetsView — a free application for screen mirroring between PC and TV (Android/iOS/Windows/Mac).
• 📺 ApowerMirror — a powerful tool that supports phone control from a computer.
• 🌐 DLNA servers — allow you to broadcast only media files (videos, photos), but not the entire screen.

There are also specialized receiver programs that can be installed on Smart TVs (if the platform allows it, such as Android TV), turning the TV into a Miracast or AirPlay receiver, even if factory support is missing or not working correctly.

⚠️ Please note: When using third-party apps via cloud services, your video stream may go through the developer's servers. For sensitive information (banking, personal documents), use only local connection methods (Direct Wi-Fi) that do not require an internet connection.

Solving problems and delays

Even with a perfect setup, users may encounter issues. The most common is audio and video desync or image freezing. This is almost always due to insufficient Wi-Fi bandwidth or interference. Try moving closer to the router or freeing up bandwidth by disabling downloads on other devices.

If your TV doesn't detect your computer, check your network type in Windows. The network should be marked as "Private," not "Public." Windows blocks device discovery in the Public profile for security reasons. You can change this in Network & Internet settings.

If your connection is constantly dropping, it might be a good idea to lower the streaming resolution in Windows settings. Streaming in Full HD (1080p) requires significantly fewer resources than 4K and can solve lag issues on older routers.

Comparison of connection methods

To summarize, it's worth systematizing the information about the available methods. Each method has its advantages and disadvantages, which depend on your equipment and intended use.

Choosing the best option depends on your priorities. If maximum reliability and latency are important (for example, for presentations or gaming), nothing beats a physical HDMI cable. However, for everyday content viewing and photo sharing, Wi-Fi Screen Share provides unmatched convenience and freedom of movement.

Why is the broadcast delayed?

Lag occurs due to the time it takes to encode the video signal on the computer, transmit data packets over Wi-Fi, decode them on the TV, and output them to the display. Wireless networks are susceptible to interference, which forces the system to resend lost packets, increasing latency. Protocols like AirPlay are more optimized than Miracast, but the physics of the process remain the same.

Is it possible to stream audio separately?

Yes, in most cases, audio is transmitted along with video. However, in the Windows (or macOS) sound settings, you can select the output device. If you want the video to play on your TV and the audio to play through your computer's external speakers, select the appropriate playback device in the volume mixer, but this may cause desync.

Is it safe to use Screen Share on public networks?

No, using screencasting on public Wi-Fi networks (such as cafes and airports) is dangerous. Attackers on the same network can intercept the stream or infiltrate the connection. Use this feature only on trusted home or corporate networks with password-protected access.

How to improve picture quality with poor signal?

Reduce your computer's screen resolution before streaming. Streaming at 1280x720 instead of 1920x1080 will reduce bandwidth usage by a factor of 4. Also, close any background programs that consume bandwidth, and if possible, use a Wi-Fi adapter with an external antenna.