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About CFG Files

A .cfg file is a configuration file that stores settings and preferences used by a software program, operating system, game, or other application. CFG files can contain information that controls how a program operates, such as display options, user preferences, file paths, network settings, or other customizable options. The format and contents of a CFG file vary widely depending on the software that created it, and the settings are often stored as readable text using formats such as simple name-and-value pairs or structured data.

Software developers and other computer users have used CFG files for decades to store settings separately from a program's main executable files. They are especially common in applications that let users or administrators customize how the software operates, as well as in games and server software that offer extensive configuration options. Today, you may encounter CFG files when customizing software, troubleshooting configuration problems, managing game or server settings, or maintaining older applications.

You can often open and view a .cfg file with a source code editor or plain text editor, although some CFG files use specialized or structured formats that may be easier to modify with the software that created them. Note that changing a CFG file incorrectly can cause the associated program to behave unexpectedly, so you should generally back it up before editing it manually.