Convert rm1 to pnm Online: rm12pnm
You can use Tom's Editor to easily convert images from
Rambrandt .RM1 to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Rambrandt is an image format with extension RM1.
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.