What is .PGM file extension?
.PGM file extension is a known file type. This section tells you everything you need to know about this extension.
Grayscale image file encoded with either one or two bytes (8 or 16 bits) per pixel; contains header information and a grid of numbers that represent different shades of gray from black (0) to white (up to 65,536); typically stored in ASCII text format, but also has a binary representation.
PGM files include a header that defines the PGM format type ("P2" for text or "P5" for binary), image width and height, and the maximum number of shades. While binary PGM files may contain multiple images, ASCII PGM files may only include one image.
PGM files may also be called "portable greymap" files.
You can see a list of software programs below that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.