Suggests workarounds: manual push/pull techniques, using native "Arc" and "Follow Me" tools, or upgrading to SketchUp Pro.
(the web-based version) does not support third-party extensions or plugins like the "Round Corner" extension. Extensions such as Round Corner (developed by Fredo6) are designed exclusively for SketchUp Pro (desktop version). Round Corner Extension Sketchup Free Download
Would you like me to write an essay with the following structure? Understanding the Limitations: Why "Round Corner Extension for SketchUp Free" Doesn't Exist Suggests workarounds: manual push/pull techniques
Explains the popularity of the Round Corner extension for smoothing edges and creating fillets in 3D modeling. Round Corner Extension Sketchup Free Download
Describes its utility in Pro: rounding edges, beveling, and adding organic smoothness to hard-surface models.