Convert cdu to flif Online: cdu2flif

You can use Tom's Editor to easily convert images from
CDU-Paint .CDU to Free Lossless Image Format .FLIF.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

CDU

CDU-Paint is an image format with extension CDU.

FLIF

Free Lossless Image Format is an image format with extension FLIF.