DWG is a binary file format used for containing 2D and 3D design data. It stands for "Drawing" and is the native format of most CAD (Computer Aided Design) applications, especially AutoCAD. DWG files are proprietary binary files used for storing two-dimensional (2D) and three-dimensional (3D) drawings, model data, and metadata. They contain vector image and metadata for representation of contents of CAD files. DWG files are widely used by architects, engineers, and designers for various designing purposes.

DWG files are closely associated with CAD programs, and typically drafters, architects, and engineers use them to develop design sketches. There are several other file types associated with DWG, including .bak, .dws, .dwt, .sv$, among others. DWG enthusiasts swear by its standardized approach to architectural and engineering projects.

DWG files can be opened with a wide range of software, including Adobe Creative Cloud, CorelDRAW Graphics Suite, and Autodesks free DWG TrueView.