Download the free Autodesk DWF Viewer to easily view and print 2D and 3D drawings, maps, and models in the DWF format the ideal way to share accurate design information. Only DWF is built for distributing CAD files and 3D models so the fidelity and intelligence of designs can be communicated securely, including object and mass properties, sheets, and layers. Often at 1/10 the size of other formats, DWF files are easy to distribute and post online. Plus, with one-click publishing from AutoCAD software and other design applications, and the free Autodesk DWF Writer, theres no need to buy additional software. Version 7 upgrade from DWF Viewer to Design Review 2008 free for more functionality.