Windows Metafile (.wmf)

The Windows Metafile (WMF) file extension, developed by Microsoft, is a graphics file format primarily used for storing vector graphics and bitmap images. Introduced in 1988 with Windows 2.0, WMF files contain a series of metafile records that store drawing operations, such as commands for drawing lines, circles, and rectangles, which collectively form the graphic. These files also support bitmap drawing operations, making them versatile for various graphic needs. The WMF format was designed to facilitate the exchange of graphics information between Windows applications, allowing for seamless integration and manipulation of images within software like Microsoft Word, PowerPoint, and Publisher. Despite its initial popularity, the format's 16-bit data limitation and device dependence led to its gradual replacement by the Enhanced Metafile (EMF) format in 1992 with the release of the Windows NT 3.1 version.

WMF files are particularly useful in scenarios where scalable vector graphics are required, as they can be resized without loss of quality. This makes them ideal for printing high-quality images and modifying graphics in image editors. The format stores image data in a series of metafile record structures, each containing drawing commands, object definitions, and configuration settings. Over time, the WMF format has been largely superseded by more modern formats like Scalable Vector Graphics (SVG) and Encapsulated PostScript (EPS), which offer better compatibility and features. However, WMF files are still supported by various image editing and viewing applications.