Convert ghg to pnm Online: ghg2pnm

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

Go to Tom's Editor

GHG

Gephard Hires is an image format with extension GHG.

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.