Highly portable across mobile (Android/iOS) and Windows. It requires no registration and works offline. It includes advanced features to customize paper size , orientation, and color when exporting to PDF.
(Lightest of All)
If you need to view CAD files on the go without installing heavy software, Autodesk Viewer (Web) dwg viewer portable better
: Includes 2D/3D viewing, measuring, and annotation tools. Highly portable across mobile (Android/iOS) and Windows
After closing the viewer, run Regedit . Search for the software name. If you find keys, it isn't truly portable. Real portable apps leave the Registry untouched. dwg viewer portable better