CSS round corner generator

CSS Round Radis

In the Web development, border-radius Properties have evolved from simple rounded buttons to a central tool for building complex shapes and modern UIs.

1. Basic grammar: more than just four corners

Although most people are used to it. border-radius: 8px; This shorthand, but CSS actually allows us to define a different radius for each angle.

• Single value: The four angles have the same radius.
• Polyvalue: Sets in the order of " Top Left, Top Right, Bottom Right, Bottom Left " .
• Slash syntax: Horizontal Radius / Vertical Radius 。 This is the key to creating irregular shapes (e.g. ellipse or organic shapes).

2. Common design scenarios and solutions

Scenario one: Create a perfect circle

When the element is equal in width (square) and the corner is set to 50% or larger, the element will be in a positive circle. This is often used in user headers.

Scenario 2: Modernly-sensed "Putting pills" button

For rectangular buttons, you can get smooth half-rounded ends by setting the corner value to more than half the height.

Scenario III: Organic "liquid" shape

Controls the horizontal and vertical radiuss of each angle independently, e.g. 60% 40% 30% 70% / 60% 30% 70% 40% , which creates organic shapes that seem very natural and asymmetric.

3. Browser compatibility and performance

border-radius It is extremely well supported in all modern browsers. From a performance point of view, it is much more efficient than using background pictures to achieve round corners, as it is directly processed by the browser ' s rendering engine to support hardware acceleration.

Use ours. Visualized CSS round corner generator , you can drag sliders in a visual way, observe shape changes in real time and copy the generated standard CSS code directly to your project.