DWF is a design web format which is used for small, free application that you can use to view and print the files. A DWF viewer is developed by <A href="https://www.intellicad.org/articles-and-press-releases/topic/actcad">IntelliCAD</A>. DWF viewer helps you to open and print the design. It compresses highly rich files, who needs to view, edit or print