Convert sun to pnm Online: sun2pnm

You can use Tom's Editor to easily convert images from
SUN Rasterfile .SUN to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

SUN

SUN Rasterfile is an image format with extension SUN.

PNM

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.