RoundCorner performs the rounding of the edges and corners of 3D shapes along a 2D profile, in 3 modes: Round corners, Sharp corners and Bevel.

RoundCorner performs the rounding of the edges and corners of 3D shapes along a 2D profile, in 3 modes: Round corners, Sharp corners and Bevel. RoundCorner also supports concave corners (always rendered as Round) and non-orthogonal edge faces. Corners can have 2, 3, or more edges.


You can get more information and documentation on the Home Page for RoundCorner on Sketchucation.



IMPORTANT: Requires you also install LibFredo6.



RoundCorner, like my other plugins, is hosted on Sketchucation. Sketchucation is a Community site entirely dedicated to Sketchup. It includes an ExtensionStore of 800+ plugins, as well as a quite rich Discussion Forum about Sketchup and a Gallery. Registering on Sketchucation is FREE.


IF YOU ARE NOT FAMILIAR WITH LIBFREDO6 INSTALLATION OR WITH SKETCHUCATION, it is advised to watch the video "LibFredo6 Installation".


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I downloaded Round Corner. When I go to window preferences I dont get the Extention option. Can anyone help. Thanks

I have this same issue, any chance you've figured out how to use the extension?

THank !


Can you download it?

Casey H's picture

Does this not work for Sketchup 2018? I updated and now I can't install this. Any Ideas?

not for 2018!

When you install RoundCorner v3.2e, you get the following: "outdated signature" how to fix it?


very good~~

nunu p's picture


성우 민's picture

Make 'RoundConer' look like the image below

Andreas F.'s picture

great tool! Thank you very much, Fredo.

I would love it, if you could extend your tool with this feature:
[x] create construction handles.

If a user checks that one, your tool automatically keeps the original points (with edges, if you prefer, just without the faces) and in case of points make them construction points. That way you can still adjust the positions without interferences in renderings.

It seems the plugin is incomaptible with High Sierra mac os :(
any ideas to fix the problem?

like design spark

Mark L's picture

Amazing!!! Couches look so much more welcoming with rounded edges instead of sharp ones. Thank you for this!