The PLG file extension is associated with an integrated development environment (IDE) called Microsoft Visual Studio. It is a tool used by programmers that allows you to create applications, mainly for Windows systems, but also for web applications.

PLG are data files that are used to store the compilation log. They can contain HTML code that, when opened in a web browser, allows you to view information about the project's compilation. PLG build log files are generated automatically, but the user can disable this option.