Convert crw to pnm Online: crw2pnm
You can use Tom's Editor to easily convert images from
Canon Digital Camera Raw Image .CRW to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Canon Digital Camera Raw Image is an image format with extension CRW.
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.