Convert fun to pnm Online: fun2pnm
You can use Tom's Editor to easily convert images from
Funpaint .FUN to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Funpaint is an image format with extension FUN.
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.