Convert pnm to dib Online: pnm2dib
You can use Tom's Editor to easily convert images from
Portable aNy Map .PNM to Microsoft Windows Device Independent Bitmap .DIB.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
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.
Microsoft Windows Device Independent Bitmap is an image format with extension DIB.