Convert img to pnm Online: img2pnm

You can use Tom's Editor to easily convert images from
GEM Bit Image .IMG to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

IMG

GEM Bit Image is an image format with extension IMG.

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.