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.MSI File Extension

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File TypeWindows Installer Package

DeveloperMicrosoft
Popularity
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Rare Uncommon Average Common Very Common
CategoryMisc Files
FormatBinary

Binary

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

What is an MSI file?

An MSI file is a package that contains installation information for a particular installer, such as files to be installed and installation locations. It 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.

Programs that open MSI files
Windows
Microsoft Windows Installer
7-Zip
Updated 5/24/2016