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Tool to view and extract contents of a Windows Installer (.msi) file

This is an exact mirror of the lessmsi project, hosted at http://lessmsi.activescott.com/. SourceForge is not affiliated with lessmsi.
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lessmsi (formerly known as Less Msiérables) is a free utility with a graphical user interface and a command line interface used for viewing and extracting the contents of a Windows Installer (.msi) file.

lessmsi Web Site


  • Windows Explorer Integration so that you can right-click on a Windows Installer file (.msi file) and select "Extract Files" to extract it into a folder right there
  • GUI allows you to view detailed information about any MSI file
  • MSI Table Viewer useful for people who work a lot with installers


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