Some users might look for a direct download link. However, for most SketchUp extensions, including the Round Corner extension, it's recommended to install them directly through the Extension Warehouse to ensure they are properly linked to your SketchUp installation and to get updates easily.
Alternative to RoundCorner Plugin? - Extensions - SketchUp Forums Round Corner Extension Sketchup Free Download
Native SketchUp uses "polygons." To round a corner, you would need to manually draw arcs and use the Follow Me tool, which is time-consuming and prone to geometric errors. Round Corner automates this, keeping your geometry clean and your file size small. Some users might look for a direct download link
Rounds edges but maintains a sharp point where multiple corners meet. - Extensions - SketchUp Forums Native SketchUp uses
: Includes Round Corners , Sharp Corners , and Bevel tools to create different edge finishes.
If you use SketchUp, you know that the "sharp edges" look can get old very fast. Real furniture, architectural moldings, and gadgets almost always have some degree of beveling or rounding.