Convert irg to pnm Online: irg2pnm

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

Go to Tom's Editor

IRG

Super IRG is an image format with extension IRG.

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.