Why Use a Border Radius Tool?
Rounded corners have become a staple of modern UI design, softening the visual appearance of websites and apps. The border-radius property in CSS controls this curvature. While simple values like 5px are easy to write, creating complex shapes—like asymmetrical blobs or pill-shaped buttons—can be tricky to visualize in your head.
Our CSS Border Radius Preview Tool solves this by providing immediate visual feedback. You can adjust the global radius for a uniform look or fine-tune individual corners to create unique geometric designs. This is particularly useful for chat bubbles, image overlays, or custom UI elements that require specific curvature.
This free tool also handles the shorthand syntax automatically. If you set different values for each corner, the tool generates the correct CSS string (e.g., 10px 20px 30px 40px) following the top-left, top-right, bottom-right, bottom-left order, saving you from syntax errors.
Frequently Asked Questions
What is the order of values in border-radius?
The shorthand property follows the clock-wise order: Top-Left, Top-Right, Bottom-Right, and Bottom-Left.
How do I make a perfect circle?
Set the border-radius to 50% or a very large pixel value (like 9999px) on an element that has equal width and height.
Can I use percentage values?
Yes, this tool uses pixels for precision, but you can manually change the unit to % in the code if needed, especially for responsive shapes.