Any simple way to convert dwg to pdf without autocad on PC?

It is a free, open-source parametric 3D CAD application that also handles 2D drafting work, making it a viable tool for opening and converting DWG to PDF files. Native DWG support isn't built directly into the core installer due to licensing restrictions on Autodesk's format, but FreeCAD works around this by using the ODA File Converter as a backend.

In short, FreeCAD, one of the best free dwg to pdf converters.

You install the free ODA File Converter separately, point FreeCAD to it in the preferences (under Import-Export settings), and FreeCAD will then silently convert DWG to DXF behind the scenes before opening it in the Draft or TechDraw workbench. From there, the geometry appears as native FreeCAD objects that you can inspect, clean up, or annotate before exporting.

Cons:

• Requires installing and configuring a separate tool (ODA File Converter) — not a true one-click solution
• DWG import quality can be inconsistent, especially with newer DWG versions, complex blocks, dimension styles, or custom line types
• Steeper learning curve than dedicated viewers or online converters, especially for non-CAD users
• Exporting to PDF via TechDraw requires setting up a drawing page/template first if you want proper scaling, borders, or title blocks
• Larger or more complex drawings can be slow to import and render