What is an APPXBUNDLE file? An APPXBUNDLE file is an app package that is used for distributing Windows desktop and UWP ( Universal Windows Platform ) apps. The package contains one or more versions of an app, each of which is compiled for a specific processor architecture (x86, x64, or ARM).

More Information The different architectures in APPXBUNDLE files allow the appropriate version of the app to be deployed to a matching computer's architecture. For example, a 32-bit system may receive the x86 version of the app while a 64-bit system receives the x64 version. By including multiple architectures into an APPXBUNDLE file, developers can support a wide range of devices with a single installer package. AppX bundles are created by Visual Studio, Microsoft's primary Windows development IDE. Developers can upload bundles to the Microsoft Store, or make them available for sideloading, a process that allows users to manually install apps. NOTE: Single app packages are saved as .APPX files.