FileInfo.com


.PGM File Extension


File Type Portable Gray Map Image
File Format File
Common? No
File Description 8-bit grayscale image file; may contain different shades of gray and transparent pixels; formatted in a text format, in which numbers are used to represent how light or dark each pixel is.

PGM files are also called "portable greymap" files.
Program(s) that open pgm files Mac: Netpbm; Adobe Photoshop with CartaPGM plug-in; Editable with a text editor
Windows: Netpbm; Corel Paint Shop Pro; Adobe Photoshop with CartaPGM plug-in; Editable with a text editor
Unix: Netpbm; Editable with a text editor

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/pgm