The .fnt file extension is primarily associated with font files used by various operating systems and applications, most notably older versions of Microsoft Windows. These files contain bitmap font information, which defines how characters appear on the screen or in print. Unlike modern vector-based fonts like TrueType (.ttf) or OpenType (.otf), .fnt files are typically raster-based, meaning they consist of a grid of pixels for each character at specific sizes. This makes them less scalable than their modern counterparts, as they can appear pixelated when enlarged. While largely superseded by more advanced formats, .fnt files are still encountered in legacy software, embedded systems, and specific gaming engines that require low-overhead font rendering. They store character glyphs, header information, and mapping tables that tell the system which pixel pattern corresponds to which ASCII or Unicode character. Some .fnt files are also used by the ProFont system or as generic font resources in specialized CAD or graphics software.