Convert mg4 to pnm Online: mg42pnm

You can use Tom's Editor to easily convert images from
MultiArtist 8x4 .MG4 to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

MG4

MultiArtist 8x4 is an image format with extension MG4.

PNM

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.