, the lack of official distribution means you must accept security risks or invest time in creating your own portable package. For most users, the web-based Autodesk Viewer or a legitimate portable CAD viewer (like CAD Exchanger) is a better choice.

| Software | Portable? | Free? | Key Feature | |----------|-----------|-------|--------------| | | No | Yes | Clean interface, good 2D viewing | | Autodesk Viewer (web) | Yes (browser) | Yes | Runs anywhere with internet | | BRL-CAD | No | Yes | Open source, powerful 3D viewing | | CAD Exchanger | Yes (paid) | Limited | Many formats (STEP, IGES, STL) | | Online DWG viewers (e.g., A360, ShareCAD) | Yes | Usually | No installation, but files go to cloud |

If you proceed with a third-party portable version, always run it in a sandbox or isolated virtual machine first, and never on a machine with sensitive data. Last updated: October 2025. Product names are trademarks of their respective owners.