Nasjicad is a free online 2D CAD editor that runs in your browser - no install needed. Open, view, edit and convert DWG and DXF drawings, export to PDF, and convert PDF to DWG. It includes layers, blocks, dimensions, snapping and a library of ready CAD blocks. Built for architects, engineers, students and contractors who need to make a quick change to a drawing without paying for a heavy desktop CAD license. Desktop apps for Windows and Mac are also available.