Convert sun to flif Online: sun2flif
You can use Tom's Editor to easily convert images from
SUN Rasterfile .SUN to Free Lossless Image Format .FLIF.
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.
FLIF
Free Lossless Image Format is an image format with extension FLIF.