Convert pcd to pnm Online: pcd2pnm
You can use Tom's Editor to easily convert images from
Photo CD .PCD to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Photo CD is an image format with extension PCD.
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.