Convert pgc to pnm Online: pgc2pnm
You can use Tom's Editor to easily convert images from
Portfolio Graphics Compressed .PGC to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Portfolio Graphics Compressed is an image format with extension PGC.
PNM images are uncompressed 24 bit RGB images. Can cannot store Alpha channel. PNM images come in 2 types: binary and text. Especially popular on Linux.