Convert dgu to pnm Online: dgu2pnm

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

Go to Tom's Editor

DGU

DuneGraph is an image format with extension DGU.

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.