If you only need 2D printing and viewing on old hardware, take CADViewer . It is the lightest and most reliable.
The Top 11 DWG Viewers That Are Free to Use Recommended * ZWCAD is an advanced and compact CAD program for Windows and Linux, but ... DWG FastView-CAD Viewer&Editor - Apps on Google Play dwg viewer portable top
Based on our research and testing, we recommend: If you only need 2D printing and viewing
| Feature | Autodesk DWG TrueView | DWG FastView | LibreCAD (Portable) | | :--- | :--- | :--- | :--- | | | Free | Free (Premium available) | Free (Open Source) | | True Portability | No (Requires Install)* | Yes | Yes | | File Size | Large (~600MB+) | Small (~100MB) | Very Small (~30MB) | | Rendering Accuracy | 10/10 | 8.5/10 | 8/10 | | Measurement Tools | Advanced | Standard | Standard | | Mobile Version | No | Yes (Excellent) | No | | OS Support | Windows Only | Windows / Mac / Mobile | Windows / Mac / Linux | DWG FastView-CAD Viewer&Editor - Apps on Google Play
Recognized as one of the fastest viewers available, ZWCAD uses a compact kernel to minimize memory usage. It is particularly effective for large files and satellite images, offering a smooth experience on Windows and Linux, as well as iOS and Android.
Users who need conversion + viewing.
Accuracy purists who need 100% Autodesk fidelity.