Potrace (/ˈpoʊtreɪs/)[2] is cross-platform, open-source software which converts bitmapped images into vector graphics.
[3] FontForge can use Potrace to import a bitmap image into a font.
An open-source progressive web app that uses Potrace is SVGcode.
Potrace's input and output is black and white (colored images are greyscaled before processing).
The commercial Total Vectorize program also uses Potrace as its core.