PFA is a font, not a picture
PFA (a PostScript Type 1 font) describes the outlines of letters, numbers and symbols — a whole typeface. A JPEG is a single flat image of pixels. There's no meaningful way to turn one picture into a complete alphabet.
Trying to turn a JPEG into a PFA font? Here's why that isn't a conversion — and what to do instead.
You can't convert a JPEG to PFA — a PostScript Type 1 font isn't an image, and an image isn't a typeface.
PFA (a PostScript Type 1 font) describes the outlines of letters, numbers and symbols — a whole typeface. A JPEG is a single flat image of pixels. There's no meaningful way to turn one picture into a complete alphabet.
Making a font means drawing or digitizing each glyph and setting metrics and kerning in font software like FontForge, Glyphs or FontLab. It isn’t an image conversion.
JPG (JPEG) is a lossy raster format that compresses photographs into small files by discarding detail the eye barely notices — the most widely used photo format on the web and in cameras.
How to open JPG opens in every browser, image viewer and editor with no special software.
Full JPEG format guidePFA is the ASCII (text) form of a PostScript Type 1 font, storing letter outlines as readable PostScript — a classic print-era font format.
How to open PFA installs through font managers and opens in FontForge; convert to TTF/OTF for modern systems.
Full PFA format guide