A 'Sandboxie Plus free download' search often comes from someone who wants to test an unfamiliar installer or browse riskier sites without risking their actual system. Originally a commercial Sophos product, Sandboxie was open-sourced and continues as Sandboxie-Plus, isolating any program so its file and registry changes never touch the real OS. This guide covers installing it and creating your first sandbox for a quick test run.
What Changed When Sandboxie Went Open Source
Sandboxie-Plus is Windows-only and now fully open source, meaning the isolation engine's code is publicly auditable rather than a closed commercial product like the original Sophos release.
It's free for all users now, with no license key required, though it still needs to be paired carefully with Windows versions since kernel-level sandboxing can be sensitive to OS updates.
Who ends up using Sandboxie
Sandboxie is reached for by people who want to test unfamiliar software or browse riskier sites without risking their real system.
- Users testing unfamiliar installers before trusting them on their main system
- Security researchers isolating suspicious files or browser sessions
- IT staff evaluating software changes without committing them to a production PC
Before you install
A couple of things worth knowing about Sandboxie before you request the link: it only ships for Windows, so double-check that's the machine you're installing it on before you request the link. And on pricing, Sandboxie is open source, so the installer is free with no trial timer, feature lock, or upsell screen to click past. It's developed and maintained by Sophos (Sandboxie-Plus).
System requirements
- WindowsWindows 10 or 11 (64-bit); older 7/8.1 builds usually still run but no longer get official support
Heavier workloads (large files, high-res media, big projects) will naturally want more RAM and a faster CPU/GPU than the bare minimum.
Quick steps
- Download the Sandboxie-Plus installer for your Windows version below.
- Install it, which also sets up its sandboxing driver - a restart may be required.
- Right-click any program and choose 'Run Sandboxed' to test it in isolation.
Sandboxie: the honest trade-offs
- Isolates programs' file and registry changes from the real Windows install
- Now fully open source with publicly auditable isolation code
- Free for all users with no license key required
- Kernel-level sandboxing driver can be sensitive to major Windows updates
- Windows-only, so it offers no help for macOS or Linux users
This links to the official Sandboxie-Plus GitHub release, the same open-source build the project itself distributes.
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Keeping Sandboxie up to date
Since Sandboxie is open source, most Linux distributions keep it current through their own package manager. On Windows/macOS, re-running the installer from the official site (or an updater built into the app, if it has one) gets you the latest release. Sticking to the developer's own distribution channel — which is what this page links to — means you're never stuck on an old build with unpatched bugs just because a mirror site stopped updating its copy.
Features, install steps, alternatives and more detail live on the main Sandboxie page.
Frequently asked questions
Is Sandboxie still a paid Sophos product?
No, it was open-sourced and now continues as the free Sandboxie-Plus project with no license key needed.
Does running a program sandboxed protect my actual Windows files?
Yes, sandboxed programs write their file and registry changes into an isolated container instead of the real system, and you can delete the sandbox contents afterward.
