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APPX MSIX
File conversion

Convert APPX to MSIX

Verified by Adam B.· reviewed by FE Editorial ·updated Aug 1, 2026
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Is it possible to convert APPX to MSIX?
Yes - APPX converts to MSIX.

The standard path is the MSIX Packaging Tool (free from the Microsoft Store), which guides you through a capture session and outputs an .msix. Developers with source access can switch their Visual Studio packaging project to output MSIX directly.

Also to MSIX: WAPPROJ · OSD · EMSIXBUNDLE

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Tested on macOS, Windows & Linux
Last verified Nov 2026

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Why convert APPX to MSIX?

Microsoft replaced APPX with .MSIX in 2018 as its preferred Windows packaging format. MSIX adds support for traditional Win32 desktop apps, better update mechanics, and improved enterprise management - and is now required or strongly preferred for Microsoft Store submissions and enterprise deployments.

How to convert APPX to MSIX

MSIX Packaging Tool EASIEST

Install the free MSIX Packaging Tool from the Microsoft Store, run the guided wizard, capture the app install session, and save the resulting .msix file.

Microsoft Visual Studio FREE

Open the Windows Application Packaging Project in Visual Studio 2019 or later, switch the output format to MSIX in project properties, and build.

About these formats

.APPX Microsoft Windows App Package (AppX)

An APPX file is a Windows app installation package introduced with Windows 8. On Windows 10/11, double-click it and the built-in App Installer handles it, or run Add-AppxPackage -Path…

Open .APPX details →
.MSIX MSIX File

A .MSIX file is a data file used by specific software.

Open .MSIX details →

Quality & what to watch

  • APPX and MSIX share the same OPC/ZIP container structure - the difference is in metadata, tooling, and supported app types, not the binary layout.
  • An MSIX package requires a valid digital signature before Windows will install it; test packages need their signing certificate installed in Trusted People/Root first.
  • MSIX extends support to traditional Win32 desktop apps that APPX (originally UWP-only) did not cover.

Frequently asked questions

Do I need to rebuild the app to create an MSIX?
Not necessarily - the MSIX Packaging Tool can capture and repackage an existing app installation without access to source code.
Can I just rename `.appx` to `.msix`?
The container format is identical, but a proper MSIX requires updated manifest metadata and a valid digital signature - use the Packaging Tool rather than renaming.
Is MSIX required for the Microsoft Store today?
Yes, Microsoft now requires MSIX for new Store submissions and strongly prefers it for enterprise deployments.