6 insane homelab projects for an old laptop you don't mind breaking

Published Nov 3, 2026, 7:30 AM EST Monica J. White is a journalist with over a decade of experience in covering technology. She built her first PC nearly 20 years ago, and she has since built and tested dozens of PCs. PC hardware is her main beat, and graphics cards and the GPU market at large are her main area of interest, but she has written thousands of articles covering everything related to PCs, laptops, handhelds, and peripherals. From GPUs and CPUs to headsets and software, Monica's always willing to geek out over all things related to computing. Outside of her work with How-To Geek, Monica contributes to TechRadar, PC Gamer, Tom's Guide, Laptop Mag, SlashGear, Whop, and Digital Trends, among others. Her ultimate goal is to make PC gaming and computing approachable and fun to any audience. Monica spends a lot of time elbow-deep in her PC case, as she's always making upgrades, testing something, or plotting out her next build. She's the go-to tech support person in her immediate circle, so she's never out of things to do. Whenever she has spare time, you'll find her gaming until the early hours and hanging out with her dog. What can you do with an ancient laptop? Well, in my case, most of them just sit in a drawer and collect dust. I'm not one to throw stuff away. For instance, I've used an old Windows 10 PC for a NAS, and I also routinely repurpose even the most useless-looking SSDs. But old laptops? Really, really old ones? Those things are often underpowered to the extent of being worthless ... Which makes them the perfect testing ground for some absolutely wild homelab projects. Build an entire offline internet you can carry around Your own version of the internet, no connection required I've had some pretty terrible ISPs in my time, so I'm no stranger to the concept of the internet being down. These days, it's less of an issue, what with mobile hotspots and things like that, but before that ... well, it was always boring whenever the connection went down mid-game. Annoying, too, but also boring. For situations like this, what if you could just have a whole library of fun websites available to you regardless of whether the internet is working or not? That's exactly what you can build with an old laptop and a free tool called Kiwix. It lets you download offline copies of resources like Wikipedia, technical documentation, and books, all stored in compressed ZIM files. Install Kiwix Server on your laptop, load it up with whatever content you want, and other devices on your local network can access the library through a regular web browser. Turn your laptop into a fully functioning experimental router Mess with firewalls, VLANs, and VPNs without breaking your home network Who wants to buy a router when your old laptop can magically become one? Especially if this "router" will just be used for messing around with random projects that you wouldn't let your main router come within a mile radius of. Install something like OPNsense, an open-source firewall and routing platform, and you've suddenly got a whole networking playground to work with. You can experiment with VLANs, firewall rules, traffic monitoring, VPNs, and all sorts of things that might be a little risky to try on your main router. You'll generally want two network interfaces for separate WAN and LAN connections, so a compatible USB-to-Ethernet adapter can come in handy. Build your own airplane-tracking station Track real aircraft with a cheap USB radio receiver Whenever a friend or a family member gives me their flight details, I love to track their flight. Not just because I want to make sure they arrived safely, but just because there's something immensely cool about tracking a flight and figuring out where it is at any given time. Can you relate? Well, if you can, why not turn your old laptop into something that can track airplanes? All you need is a cheap RTL-SDR USB receiver, a suitable 1,090MHz antenna, and some free software. Aircraft equipped with ADS-B broadcast information such as their position, altitude, speed, and identification, and your receiver can pick up those signals directly from the sky. Install Linux and something like ADS-B Ultrafeeder to get started with this. Run a miniature data center inside one laptop Virtual machines let you build an entire server cluster When a home server grows out of proportion, it almost becomes a miniature data center. Well, you can build your own on an old laptop, too, although the potential to grow out of proportion may be smaller depending on the age and the capabilities of the device. You can always make your laptop pretend to be one, though. With something like Proxmox VE, you can create multiple VMs, each acting as its own little server. From there, you can install K3s, a lightweight Kubernetes distro, and build a miniature cluster with a control-plane node and a couple of worker nodes. You can experiment with deploying containers, managing workloads, and intentionally taking nodes offline to see what happens. Of course, your laptop isn't going to magically gain more processing power, so you should aim for at least 8GB, preferably 16GB, of RAM for this to make sense. Create a hacking playground you're actually allowed to attack Break things, exploit vulnerabilities, learn to defend them This one is for the more coding-inclined. Ever wanted to try your hand at hacking? And I mean actual hacking, not the thing they do in the movies where they just type a lot of random stuff rapidly and then exclaim "I'm in"? Well, actual hacking is illegal, but your old laptop can become a cybersecurity playground where breaking things is actually encouraged. One of the coolest ways to get started is with OWASP Juice Shop, a deliberately vulnerable web application that you can run locally using Docker. It's packed with security flaws for you to discover and exploit, including SQL injection, broken authentication, and more. Turn it into a Wi-Fi detective station Find out what's really happening on the airwaves around you If you have similar experiences to mine, you probably spend some time figuring out why your Wi-Fi is awful. Maybe it's a dead zone, maybe it's this, maybe it's that ... What if your old laptop could make it a little bit easier to figure out? Install Linux and a free tool called Kismet, and you can start investigating the wireless networks around you. Kismet can detect nearby access points, monitor channel activity, and capture wireless packets, giving you a much better idea of what's happening on your network. Your old laptop deserves to have a fun retirement Laptops can be sold, recycled, or repurposed. Or they can just sit there in your home, doing nothing until they're too old to do, well, anything. I prefer to give mine a fun retirement, and I recommend you give the above a try, too.