CSS Border Radius Generator

What is a CSS Border Radius Generator?

The CSS border-radius property rounds the corners of an element. While a single value rounds all four corners equally, you can also set each corner independently to create custom shapes. A border radius generator lets you adjust these visually and outputs the cleanest possible CSS.

Our generator gives you a slider for each corner plus a link toggle to control all four together. The live preview shows the rounded shape in real time, and the output collapses to a single value when all corners match.

How to Round Corners

• Keep corners linked to round all four equally with one slider
• Unlink to control the top-left, top-right, bottom-right, and bottom-left separately
• Watch the live preview reshape as you drag
• Copy the optimized border-radius declaration

Creative Uses for Border Radius

Equal rounding creates familiar rounded rectangles for cards and buttons. A very large radius turns a square into a circle (or a rectangle into a pill shape), perfect for avatars and tags. Mixing different corner values produces organic, asymmetric shapes increasingly popular in modern design.

Per-corner control is also handy for elements that connect to others, such as tabs that should be rounded only on top, or speech bubbles with one squared corner.

Why It Matters

Corner rounding strongly influences the personality of a design — sharp corners feel formal and technical, while rounded corners feel friendly and approachable. Consistent radii across components give an interface a cohesive, intentional look. This tool generates the CSS entirely in your browser.