.VFB File

The vfb file extension is mainly  associated with the font description file format developed by Fontlab .

The vfb font description files also uses Adobe Font Development Kit application used to create Adobe OpenType fonts.

Files with vfb file extension can be usually found as font description files based on the Adobe Font Development Kit app.

How to open:

Various font editors should support this format and be able to open and work with it.

How to convert:

It seems like this font file type can be converted to other font formats, including TTF.