Home : File Types : MSI File

.MSI File Extension

File TypeWindows Installer Package

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CategoryMisc Files


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

What is a 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.

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

.MSI Extension Information

This page contains information about the file extension MSI and its known file associations. Our goal is to help you understand what a *.msi file is and how to open it.

The Windows Installer Package file type, file format description, and programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and do not publish any information we have not verified.

If you would like to suggest any additions or updates to this page, please let us know.