Convert jgp to pnm Online: jgp2pnm

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

Go to Tom's Editor

JGP

Jet Graphics Planner is an image format with extension JGP.

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.