An abbreviation and filename extension for Printer Font Metrics file, which is used with Type 1 fonts. These files coexist with related PFB files, and together represent a single typeface. PFM files contain data used to display a font on-screen. Type managers use this vector data and rasterize it. It then scales the image to the proper size and smooths the edges.

Multiple master fonts do not use PFM files, they use a somewhat similar file called a Multiple Master Metrics (MMM) file.

Compare with TrueType fonts, which contain both the screen and printer data in a single file.