Yes, you can use a laptop as a monitor for another computer. You just need the right cable or software to make the connection work between the two devices.
This is a great way to get more screen space without buying a new monitor. I’ve done this many times when my main screen felt too small. It’s a cheap trick that works well.
People often have an old laptop sitting in a drawer. That laptop screen can still be useful. You can turn it into a second display for your main computer.
I’ll show you all the ways to make this work. We’ll look at cables, wireless apps, and simple tricks. By the end, you’ll know how to use a laptop as a monitor easily.
How Can I Use a Laptop as a Monitor? The Basics
Let’s start with the simple facts. A laptop screen is just like any other monitor.
The hard part is getting a video signal into it. Laptops are made to send video out, not take it in. That’s the main challenge we need to solve.
But don’t worry. There are a few good ways around this problem. Some need a cable, and some work over your home Wi-Fi.
The best method for you depends on your gear. I’ll walk you through each option step by step. You’ll find one that fits your setup.
This guide will answer the core question: how can I use a laptop as a monitor? We’ll cover all the working methods I’ve tested myself.
It’s easier than you might think. With the right info, you can set it up in minutes.
Method 1: Using Software to Connect Wirelessly
This is the most popular way to do it. You install a program on both computers.
The software lets one computer see the other’s screen. It works over your home network. You don’t need any special cables at all.
Programs like SpaceDesk, Spacedesk, and Windows’ own “Project” tool work great. I use SpaceDesk a lot because it’s free. It makes the laptop act like a real second monitor.
First, download the software on both machines. Install the “server” part on your main PC. Install the “viewer” part on your laptop.
Open both programs and they should find each other. You might need to type in an IP address. The software will tell you what to do.
Once connected, you can drag windows to the laptop screen. It feels just like having a real second monitor. This is how I use a laptop as a monitor most often.
Method 2: HDMI or USB-C Cables (The Hard Way)
Some people think you can just use an HDMI cable. It seems like it should work, right?
But most laptops only have HDMI output ports. They send video out to a TV or monitor. They can’t take a video signal in from another computer.
There are a few rare gaming laptops with HDMI input ports. These are special and cost a lot. Most normal laptops don’t have this feature.
You can check your laptop’s manual to be sure. Look for “HDMI-in” or “video input” in the specs If it’s not there, the cable method won’t work.
This is a common mix-up. I see people buy cables that don’t work. Save your money if your laptop only has HDMI-out.
So, how can I use a laptop as a monitor with cables? For most people, you can’t. The software way is much better for standard laptops.
Method 3: Remote Desktop Connection
This method is a bit different. It doesn’t give you a true second monitor.
Instead, you take full control of the other computer. You see its entire desktop on your laptop screen. It’s like you’re sitting at that other machine.
Windows has a built-in tool for this. It’s called Remote Desktop Connection. You can find it by searching in the Start menu.
You need to turn on some settings on the main PC first. Go to System Settings and look for “Remote Desktop”. Switch it to “On”.
On your laptop, open the Remote Desktop app. Type the name of your main computer. You might need your login info for that PC.
It’s great for accessing files or programs on another computer. But it’s not the same as extending your desktop. It’s more for remote control than a dual-screen setup.
Step-by-Step Guide for Software Setup
Let’s get into the details. I’ll use SpaceDesk as our example because it’s free.
First, go to the SpaceDesk website on your main computer. Download the driver software for Windows. Run the installer and follow the simple steps.
Next, go to the same website on your laptop. Download the “viewer” application for it. Install that program on the laptop you want to use as a screen.
Make sure both computers are on the same Wi-Fi network. This is very important. They need to be able to talk to each other.
Open SpaceDesk on your main PC. It will show an IP address on the screen. Write this number down or remember it.
Now open the SpaceDesk viewer on your laptop. Type in the IP address from the main PC. Click connect.
Your laptop screen should now show your main desktop. You can set it up as an extended display in Windows settings. This is the easiest way I know to use a laptop as a monitor.
Common Problems and How to Fix Them
Sometimes things don’t work right away. That’s normal with tech stuff.
A big problem is firewall blocking. Your Windows firewall might stop the connection. You need to allow the software through the firewall.
Go to Windows Security settings. Look for “Firewall & network protection”. Click “Allow an app through firewall”. Find SpaceDesk and make sure it’s checked.
Another issue is network discovery. Sometimes computers on the same Wi-Fi can’t see each other. Make sure network discovery is turned on for both.
Go to Network Settings in Windows. Click on “Network and Sharing Center”. Turn on network discovery and file sharing.
If the screen is laggy or slow, check your Wi-Fi speed. A faster connection means smoother video. Try moving closer to your router.
Don’t get frustrated if it takes a few tries. I had to mess with settings the first time too. Once it works, it’s smooth sailing.
Why This is a Great Idea
Using an old laptop as a monitor saves you money. A new monitor can cost hundreds of dollars.
It also cuts down on electronic waste. You give new life to a device you already own. That’s good for your wallet and the planet.
You get more screen real estate for work or games. Having two screens makes you more productive. You can have email on one screen and your work on the other.
It’s a portable solution too. You can take your “second monitor” with you easily. Just bring your laptop when you travel.
Setting it up teaches you useful tech skills. You learn about networking and software. These skills help with other computer problems too.
I think everyone should try this at least once. It feels great to make old tech useful again. That’s why I love to use a laptop as a monitor.
Tips for the Best Experience
Use a wired internet connection if you can. Plug both computers into your router with Ethernet cables.
This gives you the fastest and most stable connection. Wireless can sometimes be jumpy for video.
Close other programs on both computers. This frees up memory and processing power. Your screen sharing will work better.
Set the laptop screen to full brightness. This makes it easier to see from a distance. You want it to look like a real monitor.
Adjust the display settings in Windows. Right-click on your desktop and choose “Display settings”.
Here you can arrange the screens side by side. You can also change the resolution to match. Take a few minutes to get it just right.
These small tweaks make a big difference. They help when you want to use a laptop as a monitor every day.
Safety and Things to Watch Out For
Only download software from official websites. Don’t get it from random links online.
Check that the site uses “https” in the address. This means it’s more secure. It helps keep bad software off your computer.
Make sure your Wi-Fi network is password protected. You don’t want strangers connecting to your computers. Use a strong password on your home network.
Don’t leave the connection running all the time. Turn it off when you’re done using it. This saves battery on your laptop.
Be careful with sensitive information. Don’t show private stuff on the second screen in public places. People might see it.
The FCC has tips for safe home networking. Following basic rules keeps your data safe. This is important when you set up screen sharing.
Other Creative Uses for Old Laptops
Can’t get the monitor trick to work? There are other cool things to do with an old laptop.
Turn it into a media center for your TV. Install Plex or Kodi to stream movies and music. It’s like having a smart TV.
Use it as a dedicated machine for one job. Make it your recipe computer in the kitchen. Or use it for video calls in another room.
Set it up as a home server for files. Store photos, documents, and backups on it. All your devices can access them.
Give it to a kid for learning games. Load it with educational software. It’s safer than letting them use your main computer.
According to the EPA, reusing electronics is the best choice. It’s better than recycling or throwing them away. Find a new job for your old gear.
But if you want more screen space, learning how to use a laptop as a monitor is the best trick. It’s my favorite way to reuse old tech.
Frequently Asked Questions
How can I use a laptop as a monitor for my PlayStation?
This is harder than using it for a PC. Most laptops don’t have HDMI input ports. You might need a special capture card device. These cards cost money and can be tricky to set up.
How can I use a laptop as a monitor for a Mac?
The software method works for Mac too. Programs like Luna Display are made for Apple computers. You can also use AirPlay if both devices are Apple. Check if your software supports Mac before you download it.
Does this work with any laptop?
Almost any laptop made in the last 10 years will work. It needs to run Windows 7 or newer, or a modern version of Mac OS. The software does most of the work, not the laptop hardware.
How can I use a laptop as a monitor without Wi-Fi?
You can use an Ethernet cable to connect the two computers directly. This creates a direct network between them. You still need the software, but you don’t need a Wi-Fi router.
Is there any lag when using this method?
There can be a small delay, especially over Wi-Fi. For typing and most work, it’s fine. For fast games or video editing, you might notice it. A wired connection helps reduce lag a lot.
How can I use a laptop as a monitor for free?
Use free software like SpaceDesk or Windows’ built-in tools. These don’t cost anything. Avoid paid apps until you’re sure you need the extra features. The free options work great for most people.
Conclusion
So, how can I use a laptop as a monitor? It’s simpler than you thought.
The software method is your best bet for most people. It’s free, works wirelessly, and sets up in minutes. I use this setup almost every day for my work.
Start with SpaceDesk or a similar program. Follow the steps I laid out. You’ll have a second screen running in no time.
This trick saves money and reduces waste. It turns old tech into something useful again. Give it a try with that laptop in your closet.
You might find you love having the extra screen space. I know I do. Once you learn how to use a laptop as a monitor, you’ll wonder how you lived without it.