Since this subject comes up often I am writing a definitive statement. Fireworks (layered) PNG files There is no such thing as "layered PNG".  The PNG standard does not define a way to store layers, and only deals with flattened images. Fireworks saves out additional layer data to PNG files in a proprietary format using a private tag. A definition for this proprietary data has never been made public.  A PNG saved by Fireworks can still be used as a flattened image by any applicati