Web features explorer - polygon() round keyword

Web features explorer

The polygon() CSS function accepts the round keyword and a <length> value that rounds every vertex of the polygon. You can use it to make rounded shapes without computing Bézier curves by hand.

Browser support

Chrome 150 Released on 2026-06-30
Chrome Android 150 Released on 2026-06-30
Edge 150 Released on 2026-07-02
Firefox Not supported
Firefox for Android Not supported
Safari Not supported
Safari on iOS Not supported

MDN documentation

No MDN documentation found. You can search for the feature on MDN. If you believe that MDN has no documentation about this feature, you can open an issue on MDN's GitHub repository.

Specifications

CSS Shapes Module Level 1 (#funcdef-basic-shape-polygon), from Cascading Style Sheets (CSS) Working Group (W3C).

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