WiX Toolset Overview
WiX Toolset (Windows Installer XML) is a free, open-source set of tools for building Windows installation packages — MSI and MSIX — from XML source. Instead of a visual designer, you declare the installer's components, files, registry entries, and UI in XML, then compile and link them into a package, which fits naturally into automated build pipelines and source control. WiX gives precise control over the Windows Installer engine and is used by many large software projects, including parts of Microsoft's own tooling. It supports bundles (chained installers/bootstrappers) for prerequisites. The offline installer/build installs without a network connection. Recent versions ship WiX as a.NET tool, and the Heat utility can harvest files into installer components automatically. The link on this page goes to WiX Toolset's official WiX Toolset download.