Yes, you can use a laptop as a monitor, but it’s not always easy. You need the right cables or software to make the connection work between your devices.
I get this question a lot from friends. They want to add a second screen without buying new gear. It sounds like a smart way to save money.
I’ve tried this trick many times with different laptops. Some setups work great, and others are a real headache. The results can be hit or miss.
This guide will show you the simple ways to do it. I’ll also tell you when it’s better to just buy a real monitor.
Can You Use a Laptop as a Monitor? The Short Answer
So, can you use a laptop as a monitor? The simple answer is yes, but with a big “but.” It’s possible, but it’s not built to work that way.
Think of it like using a toaster as a heater. It makes some warmth, but that’s not its main job. A laptop screen is made to show its own computer’s stuff.
You need to trick it into showing another device’s video. This takes extra steps and tools. It’s not as simple as plugging in a regular monitor.
I’ve done this to play games from my console on my laptop screen. It worked, but the picture was a little slow. For basic work, it can be a good fix.
According to Intel’s support pages, most laptops lack a video input port. This is the main reason it’s tricky. They are built to send video out, not take it in.
So, can you use a laptop as a monitor for a PC? You can, but you’ll need software help. Let’s look at how that works.
How to Use a Laptop as a Monitor with Software
Software is the easiest way to use a laptop as a monitor. You install a program on both machines. The program shares the screen over your network.
I use a free tool called SpaceDesk for this. You install the driver on your main PC (the one with the video). Then you install the viewer app on your laptop.
Make sure both computers are on the same Wi-Fi network. Open the apps and they should find each other. Your laptop screen will now show your desktop.
This method has almost no delay for office work. You can drag windows between the screens. It feels like having a real second monitor.
For gaming or video, the delay might bother you. The data has to travel over the network. A wired connection helps speed this up a lot.
So, can you use a laptop as a monitor via Wi-Fi? Yes, software makes it work wirelessly. It’s great for a temporary desk setup.
Using Cables to Connect Your Devices
Some people think a cable is the simple answer. They ask, “Can you use a laptop as a monitor with an HDMI cable?” Usually, you can’t.
Look at your laptop’s ports. You’ll likely see an HDMI port. That port is almost always an output only. It sends video from the laptop to a TV or monitor.
It won’t take video in from your game console or other PC. There are a few rare, old laptops that have a special input port. Most modern ones don’t.
You might find a laptop with a USB-C port that supports “DisplayPort Alt Mode.” This is complex. Even then, it may not work as a simple input.
The How-To Geek website explains this hardware limit well. The screen is wired directly to the laptop’s own graphics chip. It’s not a separate input you can easily access.
So, can you use a laptop as a monitor with a cable? In most cases, the answer is no. Software is your main path forward.
Using Your Laptop as a Monitor for a Game Console
This is a common wish. You want to play your PlayStation or Xbox on your laptop screen. Can you use a laptop as a monitor for a PS5?
The cable method almost never works here. Consoles output video through HDMI. Your laptop’s HDMI port won’t accept that signal.
You need a capture card. This is a small device that takes the HDMI video from your console. It sends the video to your laptop via USB where software shows it.
This adds cost and a tiny bit of delay. For casual games, it’s fine. For fast competitive games, the delay might ruin the fun.
I’ve used an Elgato capture card for this. It works, but it turns your laptop into a fancy TV. It’s not the same as a direct monitor connection.
So, can you use a laptop as a monitor for gaming? Yes, with extra gear. It’s a workaround, not a perfect solution.
Why You Might Want to Do This
Let’s talk about the “why.” Why would you try to use a laptop as a monitor? The biggest reason is saving money.
A decent monitor costs at least a hundred dollars. If you have an old laptop sitting around, using its screen feels free. It’s a great way to reuse old tech.
It also saves desk space. A laptop is thinner than a monitor and its stand. You can stack it or put it off to the side easily.
It’s perfect for temporary setups. Maybe you’re working from a hotel or a friend’s house. Bringing a monitor is silly, but your laptop is already there.
According to the Ergonomics Plus site, a second screen can boost work speed. Using a laptop as that second screen is a cheap way to get that boost.
So, can you use a laptop as a monitor to be more productive? Absolutely. An extra screen helps you see more at once.
The Big Downsides and Problems
It’s not all good news. Trying to use a laptop as a monitor has real problems. The first is input lag or delay.
The video signal has to be processed by software. This takes time. You might see your mouse move on the laptop screen a split-second late.
For typing or reading, it’s fine. For drawing or gaming, it’s awful. This lag is the main reason people give up on the idea.
Image quality can also suffer. The software might compress the video to send it faster. This can make text look fuzzy or colors look dull.
It also uses your laptop’s CPU and network. This can slow down other things you’re doing on the laptop. Your fan might spin up loudly.
So, can you use a laptop as a monitor for professional photo editing? I wouldn’t recommend it. The color and detail might not be accurate enough.
Step-by-Step Guide with SpaceDesk (Free Software)
Let’s walk through doing this with free software. I’ll use SpaceDesk as our example. It’s the one I find most reliable.
First, on your main desktop PC, go to the SpaceDesk website. Download and install the “SpaceDesk Driver” software. This makes your PC broadcast its screen.
Second, on your laptop (the one you want to use as a monitor), go to the same site. Download the “SpaceDesk Viewer” application. You don’t need to install it; just run it.
Make sure both machines are on the same Wi-Fi network. Open the viewer on your laptop. It should show your desktop PC’s name in a list.
Click on your PC’s name. After a moment, your laptop screen will turn into an extension of your desktop. You can now drag windows over to it.
To adjust settings, right-click on the SpaceDesk icon on your main PC. You can change resolution and quality here. Lower quality means less lag.
So, can you use a laptop as a monitor in 10 minutes? With this guide, yes. It’s a quick project for a Saturday morning.
Other Software Options to Try
SpaceDesk isn’t the only game in town. A few other programs let you use a laptop as a monitor. Some are free, and some cost money.
Windows has a built-in feature called “Projecting to this PC.” You can find it in Settings under System > Display. It sometimes works for Miracast devices, but not always for PCs.
There’s a popular paid app called Duet Display. It works over USB, which cuts down on lag. It’s made for iPads, but it has a Windows version too.
Splashtop Wired XDisplay is another option. It uses a USB cable to connect, which is faster than Wi-Fi. You need to install it on both machines.
The Microsoft support site has guides on the built-in “Projecting” feature. It’s worth a try since it’s already on your Windows machine.
So, can you use a laptop as a monitor with different tools? Yes, test a few to see which one feels best for you. They all work a little differently.
When You Should Just Buy a Real Monitor
Let’s be honest. Sometimes the answer is to just buy a screen. Trying to use a laptop as a monitor isn’t worth the hassle for some tasks.
If you need perfect color for design work, get a real monitor. Laptop screens are often not as good. They can be too bright or have the wrong color tone.
If you play fast video games, the lag will drive you crazy. A real monitor has a direct connection. The response is instant, which matters for gaming.
If you do this every day for work, the software setup gets old. A monitor just turns on when you plug it in. It’s one less thing to worry about.
You can find cheap used monitors online or at thrift stores. Sometimes the cost is so low it’s not worth the fuss of a software fix.
So, can you use a laptop as a monitor forever? You could, but a real monitor is a better long-term tool for your eyes and your sanity.
Safety and Performance Tips
If you decide to go for it, keep these tips in mind. They will make the experience better when you use a laptop as a monitor.
Use a wired network if you can. Plug both your PC and laptop into your router with Ethernet cables. This cuts down on Wi-Fi lag and makes the video smoother.
Close other apps on your laptop. The viewer software needs computer power to run well. Having a browser with 20 tabs open will slow it down.
Lower the resolution on the laptop screen in the software settings. A 1080p signal is easier to send than a 4K signal. The picture will still look fine.
Don’t expect to watch high-frame-rate video perfectly. There will likely be some stutter or blur. It’s okay for a work call, but not for a movie night.
The FCC website notes that wireless signals can get crowded. If your video is choppy, try moving closer to your router or changing its channel.
So, can you use a laptop as a monitor reliably? With these tweaks, you’ll have a much better chance of success.
Frequently Asked Questions
Can you use a laptop as a monitor for a desktop PC?
Yes, you can. You need software like SpaceDesk on both machines. Connect them over your home network, and your laptop becomes a second screen.
Can you use a laptop as a monitor with an HDMI cable?
Almost never. The HDMI port on a laptop is for output only. It sends video out to a TV. It does not take video in from another device.
Can you use a laptop as a monitor for a Nintendo Switch?
You can, but you need a capture card. The Switch’s HDMI goes into the capture card. The card connects to your laptop via USB, and software shows the video.
Can you use a laptop as a monitor wirelessly?
Yes, wireless is the most common way. Software sends the video signal over your Wi-Fi. Make sure your network is strong to avoid a laggy picture.
Can you use a laptop as a monitor for security cameras?
Maybe. If your security system has software for Windows, you could run it on the laptop. But using the laptop screen as a direct video input is unlikely to work.
Can you use a laptop as a monitor for a Raspberry Pi?
Yes, this is a popular project. You can use software like VNC to view the Pi’s desktop on your laptop screen. It’s a great way to set up a Pi without a separate monitor.
Conclusion
So, can you use a laptop as a monitor? The answer is a clear yes, but with some work. It’s a clever trick that uses software to bridge the gap.
It’s best for light work, reading, or as a temporary extra screen. For gaming or color-critical work, you’re better off buying a real monitor.
Give the free software method a try first. See if the lag bothers you. You might find it’s the perfect cheap fix for your desk.
I keep an old laptop just for this purpose. When I need to look at a document while I write, it’s my go-to second screen. It’s not perfect, but it gets the job done.