Convert SFD to DFONT

The SFD (Spline Font Database) file extension is primarily used by FontForge, a font editing software. SFD files are ASCII-based, making them human-readable and easily transferable across the internet. They store comprehensive font data, including outlines, character data, and bitmap fonts. Introduced by FontForge, SFD files have evolved to support multiple layers and complex font features. This format facilitates detailed font design and editing, ensuring compatibility across various operating systems.

The DFONT file extension stands for "Data Fork Font", a format used in Mac OS X (now macOS). Introduced to replace the older resource fork-based TrueType fonts, DFONT consolidates all font data into the data fork, enhancing compatibility with the OS X file system. Historically, DFONT was employed for system fonts like Courier and Helvetica, but it has been largely superseded by TrueType (TTF) and OpenType (OTF) formats. DFONT files are specific to macOS and cannot be used on Windows or Linux systems.