To download , you should not look for a standalone executable file. Instead, this essential app packaging tool is distributed as part of larger developer toolsets from Microsoft. Official Sources to Download MakeAppx.exe

: Performing semantic checks to ensure the package manifest is valid and adheres to deployment rules. Quick Command Examples

: makeappx.exe unpack /p "C:\Path\To\Package.msix" /d "C:\OutputDirectory" Download Makeappx.exe [hot]