Convert mrw to pnm Online: mrw2pnm
You can use Tom's Editor to easily convert images from
Sony (Minolta) Raw Image File .MRW to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Sony (Minolta) Raw Image File is an image format with extension MRW.
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.