.APPX File Extension
File TypeWindows App Package
What is an APPX file?
An APPX file is a Windows application package file. It contains all the metadata, files, and credentials needed to install a Windows application.
When developers submit Windows applications to the Microsoft Store, they do so by packaging all the files and information needed to install the app within an APPX or .MSIX file. Then they submit the file to the Microsoft Store. Whenever you download and install an app from the Microsoft Store, you are actually downloading and installing the APPX or MSIX file (which, when opened, installs the app itself).
NOTE: Microsoft introduced the APPX file format with Windows 8, when the Microsoft Store was called the Windows Store. While the APPX format is still supported, the newer MISX format is more common.
How do I create an APPX file?
Developers typically create APPX files within Microsoft Visual Studio. To create an APPX file in Visual Studio, open the Create App Packages wizard by right-clicking your project and selecting.
When building an app for multiple processor architectures (x86, x64, ARM, etc), developers can bundle multiple variants in a single .APPXUPLOAD or .APPXBUNDLE package. Alternatively, developers may submit individual APPX or MSIX files to the Store for each architecture.
How do I open an APPX file?
You can install any APPX file on a Windows PC by double-clicking it. Since APPX files install software, do not double-click any APPX file before verifying its legitimacy and source.