CSS Border Radius Generator

Generate precise corner curves or 8-point organic blob shapes visually for modern web design.

border-radius: 50% 50% 50% 50% / 50% 50% 50% 50%;

Advanced 8-point radius uses percentage coordinates intersecting to form organic, non-uniform shapes.

Understanding the Border-Radius Property

The border-radius CSS property rounds the corners of an element's outer border edge. You can round corners infinitely until a perfect circle is formed, or designate specific corners explicitly to create modern card layouts, tooltip points, or UI buttons.

Standard 4-Point Geometry

Simple pixel declarations function sequentially starting clockwise from the top-left coordinate. For example: border-radius: 10px 20px 30px 40px; defines the Top-Left, Top-Right, Bottom-Right, and Bottom-Left explicitly in order.

Advanced 8-Point "Blob" Geometry

To create organic, asymmetrical blobs that stray from perfect ellipses, the spec offers an 8-point syntax separated by a slash (/). It dictates horizontal-radii / vertical-radii.

  • Values before the slash dictate the X-axis curves for Top-Left, Top-Right, Bottom-Right, Bottom-Left sequences.
  • Values after the slash dictate intersecting Y-axis limits respectively to morph those boundaries irregularly.

This generator computes both methodologies seamlessly in real-time, outputting perfectly sanitized syntax ready for production stylesheet ingestion.

Related CSS & Design Tools

CSS Box Shadow

Visually create stunning 3D shadows and floating drop-effects for elements.

CSS Gradient

Design multi-color linear and radial background blends instantly.

CSS Filter Editor

Apply native browser effects like blur, brightness, contrast, and sepia.