How to Open MSI File: Extracting Files Without Installation

MSIX files are based on the MSI format, but are ZIP-compressed packages used in Windows 10 and later. Microsoft's App Installer tool opens them , and any ZIP decompression tool, including 7-Zip, can extract its contents.

If you have ever come across an MSI file, you know that it is used to install software. However, there may be times when you want to know what it would install or even run the software without actually installing it. Fortunately, you can extract the beta from inside these files without having to install them.

Less MSI is a free and open-source software that can help you with this. Simply download it and save the zip file. Extract the contents of the zip file by right-clicking it and pressing extract all. This will create a folder named less MSI. Run lessmsi.exe to open the software.

You can then drag an MSI file into the less MSI window and see which files get created or extracted by it. You can extract specific files by shift-clicking and then selecting extract. However, the user interface is a bit problematic.

Less MSI has worked for some applications such as 7-zip, which has an MSI installer. However, there is no guarantee that all applications will work. The software only guarantees that it will extract the files.

Extracting files with less MSI can save you time and effort, especially if you want to see what is inside an MSI file without having to install it.


What program opens MSI files?
View MSI files by launching the app, or by right-clicking an MSI file in File Explorer and choosing "Open in MSI Viewer".
How do I run an MSI file?
In the start menu, right-click Command Prompt and choose Run as administrator.Locate the MSI file for the version of the add-in you want to install. By default, this is the Downloads folder. ... Use the command msiexec and additional tags to run the MSI file.
Can Windows open MSI files?
MSI files are natively executable on Windows, so you can run any MSI file on Windows to install the program without a third-party app or extension. Double-click the file to run it. This will start the installation wizard, and start installing the program. If you're prompted, click Run in the confirmation pop-up.
What is an MSI file?
The . MSI file extension stands for Microsoft Software Installer. It is a Windows Installer format that uses Microsoft's Windows Installer service to configure installer packages, such as Windows applications or update packages.