DFI file extension - Digifont outline font description file
What is dfi file? How to open dfi files?
File type specification:
The DFI file extension is related to Digifont. A *.dfi file contains outline font description. Outline fonts (also called vector fonts) use Bézier curves, drawing instructions and mathematical formulas to describe each glyph, which make the character outlines scalable to any size.