Have you ever found yourself wishing for just one more screen? Maybe your main monitor is occupied, or you’re working from a laptop and miss the spacious feel of a dual-monitor setup. It’s a common situation, and you might have looked at your closed laptop and wondered, “Can I use this as a second monitor?”
The good news is that in many cases, you absolutely can. While it’s not as simple as plugging in a cable, modern software and built-in operating system features have made repurposing your laptop’s screen easier than ever. It’s a fantastic way to boost your productivity without spending any extra money on new hardware.
Using Built-in Features in Windows and macOS
If both your main computer and your laptop are running Windows 10 or 11, you’re in luck. Microsoft includes a feature called Projecting to this PC. You can enable this on the laptop you want to use as a monitor. Once set up, you can easily extend or duplicate your main PC’s display directly to your laptop screen over Wi-Fi. macOS users have a similar, seamless experience with AirPlay, allowing a Mac to be used as an external display for another Mac.
Third-Party Software Solutions
For cross-platform needs or older operating systems, third-party software is your best friend. Applications like Spacedesk (primarily for Windows), Parsec, or TeamViewer can create a virtual display over your network. Many of these tools are free for personal use and work by installing a small program on both the host computer and the laptop-as-monitor. They stream the video feed, giving you a responsive second screen.
What About a Physical Cable Connection?
It’s a common misconception that you can connect two computers with an HDMI cable to use one as a monitor. Most laptops are designed to output a video signal, not receive one through their HDMI or USB-C ports. Therefore, a direct cable connection between two laptops for this purpose is typically not possible. The software methods described above are the reliable way to achieve this goal.
Getting the Best Performance
For a smooth experience, a fast and stable network connection is important. If possible, connect both devices to the same Wi-Fi network, or even better, use an Ethernet cable for a lag-free connection. Also, keep in mind that using your laptop as a monitor can drain its battery, so it’s a good idea to keep it plugged in during use.
Turning your laptop into a second monitor is a clever trick that can significantly enhance your workflow. Whether you use built-in system settings or a free software application, you can give yourself that valuable extra screen real estate in just a few minutes. It’s a smart, cost-effective solution that makes the most of the technology you already own.