Utilities Windows
lessmsi
View the files and database tables inside Windows MSI packages, or extract their contents with lessmsi's graphical and command-line tools.
Version 2.12.9 · Direct publisher file
Link checked · Download guidance
What is lessmsi?
lessmsi is a Windows utility for inspecting and extracting Windows Installer (.msi) packages. Its graphical interface lists the files in a package, while the table viewer exposes the installer's internal database tables. It is useful when you need to inspect an MSI's contents or extract files from it.
The command-line interface provides an alternative for scripted extraction, using lessmsi x followed by the MSI path and an optional output directory. Optional Windows Explorer integration adds an Extract Files context-menu action; enable or disable it through Edit > Preferences. The linked publisher release is a ZIP archive: extract all its files into one directory before running lessmsi.exe. The screenshot is the publisher's historical interface illustration, not a newly captured image of version 2.12.9.
What it offers
- Browse files inside an MSI package through the graphical interface.
- Inspect the internal database tables of Windows Installer packages.
- Extract files from the command line, with an optional output directory.
- Enable Windows Explorer integration for an Extract Files context-menu action.
Good to know
- The direct download is a ZIP archive; the publisher instructs users to extract all files into a single directory before use or upgrade.
- Windows Explorer integration must be enabled through Edit > Preferences before using its context-menu extraction action.
Product images
Sources
References used for this listing. Retrieval dates do not indicate hands-on testing.
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