FONTEDIT (Font Editor) is used to design and save fonts for use in applications. A font is a set of alphanumeric characters, punctuation marks, and other symbols that share a common typeface design and line weight.

When the font editor creates a font file, it supplies an .FNT file-name extension. The font file contains a header, which describes the font in general terms, and a section that contains bitmaps of the characters themselves.