Convert pj to pnm Online: pj2pnm

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

Go to Tom's Editor

PJ

HP PaintJet file is an image format with extension PJ.

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.