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Virtual machine software lets you run a complete second operating system inside your current one, in a fully isolated 'sandbox'. That means you can test Linux on a Windows laptop, run older software, try risky downloads safely, build clean development environments, or learn server administration, all without touching your main system. If something breaks inside the VM, you simply delete it and start again.
This guide compares the best virtual machine (hypervisor) tools for Windows, macOS and Linux, covering performance, ease of use and licensing. Each link points to the official vendor so you download a genuine build. We also explain how to install virtualization software safely and answer the questions newcomers ask most.
Top picks & alternatives
VirtualBox
Free, open-source cross-platform hypervisor that is great for beginners.
Visit official site ↗
VMware Workstation Player
Polished desktop virtualization, free for personal, non-commercial use.
Visit official site ↗
QEMU
Powerful open-source machine emulator and virtualizer for advanced users.
Visit official site ↗
Hyper-V
Microsoft's built-in hypervisor for Windows Pro and Enterprise editions.
Visit official site ↗
Parallels Desktop
Leading commercial virtualization for running Windows on Mac.
Visit official site ↗What You Can Do With a Virtual Machine
A VM behaves like a separate computer with its own virtual disk, memory and network. That isolation opens up a lot of practical uses.
- Try other operating systems: run Linux distros or older Windows versions safely.
- Sandbox risky files: open suspicious software without risking your host.
- Development and testing: create clean, reproducible environments.
- Snapshots: save a state and roll back instantly if something breaks.
Choosing a Hypervisor
VirtualBox is the most popular free, cross-platform choice and is easy for beginners. VMware Workstation Player is free for personal use and very polished. On Windows Pro, Hyper-V is built in. Mac users on Apple Silicon often turn to UTM or commercial tools like Parallels. Match the hypervisor to your host OS and hardware.
System Requirements and Performance
Running a second OS needs spare resources. Aim for a CPU with virtualization support (Intel VT-x or AMD-V) enabled in the BIOS, at least 8 GB of RAM (16 GB or more is comfortable), and free disk space for the virtual drive. Enabling nested virtualization or assigning more cores improves guest performance.
Snapshots and Safe Testing
One of the biggest advantages of VMs is snapshots. Take a snapshot before installing something experimental, and if it goes wrong you can roll back to the exact previous state in seconds. This makes VMs ideal for malware analysis, software testing and learning, where mistakes are expected.
Installing Safely
Download hypervisors only from the official vendor sites below. Always pair them with legitimately obtained OS installation media or ISOs from the OS vendor. Enable virtualization in your BIOS/UEFI if the installer reports it is off, and keep both the hypervisor and guest tools updated.
Frequently asked questions
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