Bootgraph CAD Viewer - A lightweight CAD View and measurement software for fast, precisely & easily opening, viewing & measuring CAD files. Bootgraph CAD Viewer is a free CAD tool. It supports CAD calculation, continuous measurement, CAD base drawing gray display, table calculation, graphic recognition CAD block, length measurement, area measurement, CAD version conversion. Not only a mini CAD viewing tool, but also a powerful CAD assistant.