How to Project from Your Computer to a TV via Wi-Fi: A Step-by-Step Guide

Modern technology has completely eliminated the need for long HDMI cables to show photos to friends or watch a movie on the big screen. Wireless connectivity has become the standard, and the question of how to project from a computer to a TV via Wi-Fi arises for many users who want to enjoy content in comfort. This process significantly simplifies life, allowing you to stream images from a laptop or desktop PC to a 50-, 65-, or larger-inch display almost instantly.

There are many ways to accomplish this, and the choice of a specific method depends on your computer's operating system, TV model, and required data transfer quality. Some methods provide perfect synchronization for gaming, others are better suited for watching videos, and still others allow you to simply mirror your desktop for presentations. In this article, we'll cover all the current protocols, built-in Windows and macOS features, and proven third-party utilities in detail, so you can choose the best option for your situation.

Wireless transmission technologies: Miracast, AirPlay and DLNA

Before you begin setting up, it's important to understand the differences between the main protocols, as this will impact connection stability and functionality. Miracast is a standard developed by the Wi-Fi Alliance that allows for direct video streaming from device to device without a router, using Wi-Fi Direct technology. This means your computer and TV create their own local network for data transfer, minimizing latency.

Owners of Apple technology are familiar with the protocol AirPlay, which provides the highest transmission quality and integration with the company's ecosystem. If you have a MacBook and Apple TV (or a Smart TV with AirPlay 2 support), this method is a priority due to its stability and audio support. Unlike Miracast, AirPlay often requires a shared Wi-Fi network, although it can work with line-of-sight.

To transfer multimedia files (video, photos, music) the protocol is often used DLNAIt doesn't allow real-time screen mirroring (desktop streaming), but it's ideal for playing movies stored on your computer's hard drive through the TV interface. This is a less resource-intensive method, as the TV decodes the video stream itself, and the computer merely acts as a server.

⚠️ Note: Protocols may have different names in TV menus. For example, Miracast is called Screen Mirroring on Samsung, Smart View on LG, and Screen Mirroring on Sony.

Preparing equipment and network

Successful image projection directly depends on the quality of the network connection and the correct initial configuration. The most important requirement for most methods (except pure Wi-Fi Direct) is that the computer and TV are on the same local network. This means both devices must be connected to the same router, either via cable or wirelessly.

Make sure your TV's Smart TV feature is enabled and its software is up to date. Manufacturers regularly release patches to improve compatibility with new versions of Windows and macOS. Also, make sure your computer has the latest driver for your wireless adapter, as older versions may not support the encryption standards used by modern TVs.

• 📶 Make sure both devices are connected to the same Wi-Fi network (SSID).
• 🔄 Update your TV firmware to the latest version via the settings menu.
• 💻 Check that Windows Firewall is not blocking discovery of devices on the network.
• 🔌 Restart your router if your network is unstable or devices can't see each other.

Sometimes antivirus software may block connection attempts, perceiving them as a security threat. In such cases, you should add your display device to the trusted list or temporarily disable network activity scanning. Signal stability is also critical: if there are many walls between the router and the receiver, the streaming quality may degrade.

Screencasting in Windows 10 and 11 (Miracast)

Windows operating systems have a built-in projection feature that doesn't require any additional software. To start casting, open the notification center by pressing the following key combination. Win + A, and select the button Project (or Connect). The system will begin searching for available wireless displays within range.

If the button is not active or the device is not found, check the settings in the section Settings → System → Project to this PCHere you can allow the connection and set a security PIN to prevent neighbors from accidentally connecting to your screen. For this feature to work, your PC must support Wi-Fi Direct technology, which is required for most laptops released after 2015.

After selecting your TV from the list of available devices, a connection confirmation prompt may appear on the TV screen. Use your remote to accept the request. Your Windows desktop will then be duplicated on the large screen. You can change the display mode by opening the projection menu again and selecting one of the options: duplicate, extend, or use only the second screen.

⚠️ Please note: When using the built-in Windows feature, a slight mouse cursor lag may occur. This is unnoticeable for office work, but in fast-paced games, the lag can range from 100 to 300 ms.

What to do if the driver does not support Miracast?

If the built-in feature doesn't work, you can purchase an external adapter like the Microsoft Wireless Display Adapter or any other Miracast-enabled device that plugs into your TV's HDMI port and creates a hotspot for your PC.

Using AirPlay for macOS users

For Apple computer owners, the connection process is simplified thanks to the AirPlay protocol integrated into the system. If you have a modern Smart TV with AirPlay 2 support (many models from Samsung, LG, Sony, and Vizio), you don't need an Apple TV set-top box. Simply ensure your Mac and TV are on the same Wi-Fi network.

Find the icon in the menu bar Control center (two switches) and select Screen mirroringYour TV will appear in the list. Once selected, the image from your MacBook will instantly appear in the panel. The system will automatically adjust the screen resolution to the TV's display, ensuring a clear picture.

AirPlay not only allows you to mirror your screen but also use your TV as a separate monitor by dragging and dropping application windows. You can also stream just video from QuickTime or Safari, leaving the rest of your computer's interface free for other tasks. This is especially convenient when watching movies and needing to respond to a message without interrupting playback.

• 🍏 Click the Control Center icon in the macOS menu bar.
• 📺 Select "Screen Mirroring" and find your TV.
• 🔑 Enter the code displayed on the TV screen if confirmation is required.
• ⚙️ Adjust the screen layout in system settings if you use Extend mode.

AirPlay streaming quality is generally higher than Miracast, thanks to more efficient video compression algorithms. However, it's worth keeping in mind that under heavy CPU load (such as video rendering), streaming may experience some lag, as stream encoding occurs in real time.

Third-party streaming programs: Let's View and others

If built-in tools don't work or their functionality isn't sufficient, specialized applications can help. One popular solution is the program Let's View, which is available for Windows, macOS, Android, and iOS. It allows you to stream your screen over Wi-Fi with minimal latency and supports various display modes.

Another powerful tool is AirServer or Reflector, which turn your computer into an AirPlay, Google Cast, and Miracast receiver. While they're most often used to receive signals from a phone to a PC, some configurations also allow them to be used for reverse communication, ensuring highly stable connections in corporate networks.

For gamers who want to stream from their PC to their TV with minimal lag, the streaming feature in the client is a great solution. SteamBy installing the Steam client on your computer and the Steam Link app on your TV (or using the built-in app), you can stream games at high frame rates. This requires a very fast Wi-Fi connection, preferably Wi-Fi 6 (802.11ax).

Setting up DLNA to view media files

The DLNA method is fundamentally different from the previous ones in that it doesn't stream a desktop image, but provides access to the computer's file system. To use this, enable media streaming in Windows. Go to Control Panel → Network and Sharing Center → Streaming media settings and activate this feature.

After turning on the TV, your computer will appear in the signal source menu (Input or Source button). Once you open it, you'll see folders containing videos, music, and photos. The TV will automatically play the file using its own codecs, which reduces the load on the computer's processor.

This method is ideal for viewing large 4K files, which can lag when streaming live due to limited Wi-Fi bandwidth. However, it's not suitable for sharing a browser, PowerPoint presentations, or web browsing on a large screen.

⚠️ Important: Video file formats must be supported by your TV. If your TV doesn't have a built-in codec for MKV or HEVC, the file won't play, even if it plays fine on your computer.

To expand DLNA capabilities, you can use a media server. DLNA Server or a built-in server in the program KodiThis allows you to create libraries with covers, descriptions, and sortable TV series seasons, turning an ordinary computer into a fully-fledged home theater.

Troubleshooting and Frequently Asked Questions

Despite the simplicity of the technology, users may encounter a number of common issues. The most common is that the computer doesn't detect the TV. In 90% of cases, this can be resolved by checking whether the TV is on the same network. Often, the router broadcasts two networks (2.4 GHz and 5 GHz) with different names, and devices end up on different subnets, blocking detection.

Another problem is audio and video desynchronization. If the audio lags behind the picture while watching a movie, try lowering the stream quality in your streaming software settings or moving your computer closer to the router. Disabling other devices that are actively consuming bandwidth (downloads, streaming on other devices) also helps.

• 🔍 Check if UPnP is enabled in your router settings.
• 🛡️ Add exceptions for streaming programs in your antivirus.
• 📡 Make sure your Wi-Fi channel is not overloaded by neighboring networks.
• 🔄 Reset the network settings on your TV and reconnect.

If all else fails, try creating a Wi-Fi hotspot on your smartphone and connecting both devices to it. This will help diagnose whether the problem lies with the router or the devices themselves. In some corporate networks, administrators block the ports required for Miracast and AirPlay, so these methods may not work in offices without permission from the IT department.

Why does the picture quality drop so much during broadcasting?

This happens because the video stream is compressed for transmission over the air. Wi-Fi has limited bandwidth, and the system sacrifices quality for smoothness. Try lowering the resolution on your PC or using a wired connection for mission-critical tasks.

Is it possible to project a screen over guest Wi-Fi?

Typically, no. Guest networks have client isolation, which prevents devices from seeing each other. You'll need access to the main network or use Wi-Fi Direct, which isn't dependent on the router.

Does broadcasting affect internet speed?

Yes, wireless projection creates a significant load on the local network, occupying the bandwidth between the router and devices. Internet speeds on other devices may decrease, but the traffic itself remains within the network, not using up the provider's bandwidth.

How to remove audio delay when watching videos?

Some players (such as VLC) have an audio delay feature that can be adjusted manually. TV settings often also include a "Game" or "PC" mode that disables image post-processing and reduces overall system lag.

Is it safe to use public Wi-Fi for projection?

Using public networks to transmit confidential information is risky. Although Miracast encrypts the stream, it's better to use password-protected networks or Wi-Fi Direct, which creates a direct connection without the need for external infrastructure.