Convert jpg to pnm Online: jpg2pnm

You can use Tom's Editor to easily convert images from
Joint Photographic Experts Group JFIF .JPG to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

JPG

Joint Photographic Experts Group JFIF is an image format with extension JPG.

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.