Convert xcf to pnm Online: xcf2pnm
You can use Tom's Editor to easily convert images from
GIMP image .XCF to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
GIMP image is an image format with extension XCF.
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.