Convert p41 to pnm Online: p412pnm
You can use Tom's Editor to easily convert images from
GRF, MAX, P41, PIX .P41 to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
GRF, MAX, P41, PIX is an image format with extension P41.
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.