Border Radius Generator — CSS Rounded Corners Online Free

CSS border-radius goes far beyond simple rounded corners. The full syntax supports eight values — four horizontal and four vertical radii — enabling organic, asymmetric shapes. Our visual generator lets you drag control points to create the exact shape, then copy the CSS with one click.

What Is CSS Border-Radius?

The border-radius CSS property rounds the corners of an element. While most developers use simple values like border-radius: 8px, the full syntax allows independent horizontal and vertical radii for each corner, creating complex organic shapes far beyond basic rounded rectangles.

How to Use Our Border Radius Generator

1. Drag the corner control points to adjust each radius independently.
2. Toggle between simple mode (one value for all corners) and advanced mode (individual horizontal and vertical radii).
3. See the shape update in real time on the preview element.
4. Copy the generated CSS property value.

Why Use a Visual Border Radius Generator?

• Complex shapes: Eight-value border-radius is nearly impossible to write by hand. The visual editor makes it intuitive.
• Organic shapes: Create blob-like, teardrop, or pebble shapes using asymmetric radii that look more natural than geometric circles.
• Consistent design: Generate matching border-radius values for cards, buttons, and containers.
• Explore possibilities: Most developers only use uniform border-radius. The generator reveals the full range of what is possible.

Common Use Cases

UI designers creating design systems define standard border-radius values for different component types — small for input fields, medium for cards, large for modals, and pill-shaped for tags and badges.

Creative designers use advanced border-radius to create organic, blob-like elements without SVG, using pure CSS for animated blobs, irregular buttons, and unique image containers.

Mobile-inspired web designs use larger, more pronounced border radii to mimic the soft, rounded aesthetic of iOS and Material Design components.

Tips and Best Practices

• Use consistent border-radius values across your design. Define 3-4 radius tokens (--radius-sm, --radius-md, --radius-lg) and use them everywhere.
• For pill shapes, set border-radius to 9999px — this works regardless of element height.
• Consider that border-radius clips content including shadows and outlines. Test with actual content to ensure nothing is cut off.

Ready to try it? Use our free Border Radius Generator now — no signup required, works entirely in your browser.

Frequently Asked Questions

Is Border Radius Generator free to use?

Yes, Border Radius Generator on AnyTools.io is completely free with no usage limits, no signup required, and no premium tier. All features are available to everyone.

Is my data safe with this tool?

Border Radius Generator runs entirely in your browser using client-side JavaScript. No data is sent to any server — your input never leaves your device. You can verify this by opening browser DevTools and checking the Network tab.

Does Border Radius Generator work on mobile?

Yes, all tools on AnyTools.io are fully responsive and work on smartphones, tablets, and desktop browsers. No app download is required.