Convert rm4 to pnm Online: rm42pnm

You can use Tom's Editor to easily convert images from
Rambrandt .RM4 to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

RM4

Rambrandt is an image format with extension RM4.

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.