Dive into the world of shaped corner styling with our CSS Corners collection. The demos highlight the technical power of clip-path and mask to create not just rounded, but complex, geometrically precise shapes such as the “Bubble Corner Effect” or “Tucked Corners”. A key feature is the use of modern gradients for decorative borders, alongside animations of corner boundaries to create interactive buttons and cards. You’ll see how minimal code provides maximum shape variability and the “paper effect” with lifted edges.
26 CSS Corners
Rounded Triangle CSS Image Mask
demo & codeThis Rounded Triangle CSS Image Mask offers a mathematically perfect way to shape visuals into equilateral triangles with soft, professional edges. It is an ideal choice for high-end portfolio galleries, creative team sections, or landing pages where standard rectangular or circular crops feel too conventional. By leveraging modern CSS math, the shape remains perfectly symmetrical regardless of the image dimensions.
Beveled Corner Glow Cards
demo & codeThis Beveled Corner Glow Card component demonstrates the bleeding edge of CSS UI styling. It primarily utilizes the new corner-shape property to create chamfered (angled) edges without complex clip-paths, while implementing a sophisticated CSS Mask fallback for older engines. The interaction features a “scanning” light beam effect on the border, powered by CSS Houdini for buttery smooth interpolation.
Fancy Corner Decoration for Images
A border effect for an <img> tag - the size of the decorative edge, created with repeating-conic-gradient and -webkit-mask, is dynamically calculated via a complex calc() function controlled by CSS variables.
See the Pen Fancy Corner Decoration for Images.
Smooth Corners with CSS
A progressive technique for creating complex UI shapes using the CSS Houdini Paint API - a squircle is generated by the smooth-corners worklet, surpassing the capabilities of border-radius. The shape’s curvature is dynamically controlled via the --smooth-corners CSS Custom Property, while the effect itself is built with a combination of pseudo-elements, mask, and clip-path.
See the Pen Smooth Corners with CSS.
Inverted Border Boxes
A demonstration of a non-trivial technique for creating inverted rounded corners using ::before pseudo-elements and box-shadow. This trick allows you to “carve out” complex shapes from parent blocks, bypassing the limitations of standard border-radius.
See the Pen Inverted Border Boxes.
