Convert pnm to jpeg Online: pnm2jpeg

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

Go to Tom's Editor

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.

JPEG

The most popular image format. Does not support Alpha channel. Images are always lossy coded so when an image is saved as JPEG it always looses a bit of quality.