.WSB File Extension

Windows Sandbox Configuration

Developer Microsoft
3.0  |  1 Vote

What is a WSB file?

A WSB file is a Windows Sandbox configuration file. It contains XML-formatted settings that customize certain aspects of a Windows Sandbox instance. To use a WSB file, users double-click the file on a computer with Windows Sandbox enabled.

More Information

Screenshot of a .wsb file in Microsoft Visual Studio Code
WSB file open in Microsoft Visual Studio Code

Windows Sandbox is a virtualization feature included with certain editions of Windows, such as Windows Pro, Enterprise, and Education. It allows users to run an isolated (or "sandboxed") instance of Windows within their current Windows instance. This allows the user to, for example, install and run a program in Windows Sandbox without affecting their host machine.

Optionally, users can create and use WSB files to control certain aspects of how their Windows Sandbox instances function. Each WSB file begins with the text <Configuration> and ends with the text </Configuration>. Between those tags, users can specify settings that control whether:

  • A sandbox instance uses virtualized GPU (vGPU) or Windows Advanced Rasterization Platform (WARP)
  • The sandbox instance has network access
  • Any folders should be shared with the host instance (in a read or write capacity)
  • Any commands are issued at sandbox startup
  • The host machine's microphone and webcam input is shared with the sandbox
  • Increased security settings are placed on the RDP session
  • The host machine's printers and clipboard are shared with the sandbox

Additionally, users can specify the sandbox's memory capacity (in MB).

For complete instructions on how to specify and change these settings, refer to Microsoft's official documentation.

How to open a WSB file

You can open and edit a WSB file with Microsoft Notepad, Microsoft Visual Studio Code, or any other text editor (just as you would any other XML file).

To use a WSB file with Windows Sandbox, first check that Windows Sandbox is available and enabled on your Windows machine. If it is, double-click the WSB file to launch a sandbox instance that uses that WSB file's settings.

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Programs that open or reference WSB files

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