Home : File Types : MSI File

.MSI File Extension

NEW! Open any file with File Viewer Lite.

File TypeWindows Installer Package

4.0 (39 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryMisc Files


This file is saved in a binary format, which requires a specific program to read its contents.


Contains installation information for a particular installer, such as files to be installed and installation locations; may be used for Windows updates as well as third-party software installers.

More Information

The contents of an MSI package may be extracted using a file decompression utility like 7-Zip.

NOTE: In Windows Vista, .MSU files are used to install system updates and hotfixes.

Program(s) that open .MSI files
Microsoft Windows LogoWindows
Microsoft Windows Installer
Updated 6/13/2009