.msix file: how to open it on Windows

2 Windows apps register the .msix extension. Install one of them to open the file with a double-click.

About the format

Format

Windows app store package

MIME type

application/msix

Format data: freedesktop.org shared-mime-info and PRONOM (The National Archives, UK).

• 
  MSIX Commander

  A toolkit for MSIX packages, with multiple nice features for packaging engineers.

  Other licence 1.0.7.5 ★ 41
• 
  msix-no-cert

  A small PowerShell utility that allows creating installers for MSIX files with a self-signed certificate.

  Open source 2.2.4 ★ 9

Related guide: Change the default app for a file type in Windows