⬜ Border Radius Generator
Visually create CSS border-radius. Individual corners, 8-value syntax, and presets. Copy CSS code instantly with real-time preview.
preset
CSS Code
border-radius: 0px;
What is Border Radius Generator?
Border Radius Generator is a visual CSS design tool that enables precise creation of curved corners on web elements without manually writing code. It supports the complete CSS border-radius syntax, including individual corner control and elliptical radius values. This tool eliminates guesswork when styling buttons, cards, images, and containers—designers see changes in real-time while the generator produces production-ready CSS code.
How to Use
Start by selecting your target element type or entering custom dimensions. Use interactive sliders or numerical inputs to adjust each corner's radius independently. The preview updates instantly as you modify values. For complex elliptical shapes, toggle between symmetrical and individual-axis controls. Once satisfied with the preview, copy the generated CSS code directly into your stylesheet. The tool outputs both the shorthand notation and full 8-value syntax depending on your needs, including vendor prefixes for legacy browser support.
Use Cases
Border-radius enhances modern web design across multiple scenarios:
• Button Styling — Create modern rounded buttons matching brand guidelines without hardcoding values
• Card Designs — Subtle or dramatic corner curves improve visual hierarchy in dashboard interfaces
• Image Treatments — Transform rectangular photos into circular avatars or oval frame compositions
• Shape Creation — Combine border-radius with other CSS to construct badges, speech bubbles, and custom geometric elements
Tips & Insights
Border-radius values represent a percentage of the element's dimensions, so identical radius settings produce different effects on 100px versus 400px elements. The 8-value syntax allows independent horizontal and vertical radius on each corner, enabling unique organic shapes impossible with symmetrical curves. Performance is negligible even on elements with complex radius values. Remember that older browsers (pre-IE10) lack support; test fallback styling if targeting legacy users. Combining border-radius: 50% with square dimensions creates perfect circles—a common pattern for avatars and buttons.
Frequently Asked Questions
What is border-radius?
border-radius is a CSS property that rounds the corners of an element. You can specify the size of the rounding by pixel value or percentage, and the four corners can be set individually.
What is an 8-value designation?
border-radius allows you to specify a separate horizontal and vertical radius for each corner. It can be written in the format "4 horizontal / 4 vertical values" to create an elliptical rounded corner. Example: border-radius: 10px 20px 30px 40px / 50px 60px 70px 80px;.
What is the difference between px and %?
px (pixels) is a fixed value that results in the same roundness regardless of the element size. % (percentage) is a percentage of the element's width and height; a value of 50% results in a perfect circle or ellipse.
How do I make a complete circle?
If the width and height of the element are the same and border-radius: 50% is specified, it will be a perfect circle. This can be easily set by selecting "circle" from the tool's presets.
What is the status of browser support?
border-radius is supported by all modern browsers (Chrome, Firefox, Safari, Edge). Vendor prefixes are not required; it is also supported in IE9 and later.
How do I make a capsule shape?
Specify border-radius: 9999px or half of the element height for a horizontal element to make it capsule-shaped. You can select "capsule" from the presets of this tool.
Can I animate border-radius with CSS transitions?
Yes, border-radius transitions smoothly when combined with CSS transitions or animations, allowing you to create dynamic effects like expanding rounded corners on hover. The generated code can be easily integrated with transition properties to create smooth shape-morphing effects. Most modern browsers support these animations without any compatibility issues.
How do I implement the generated CSS code in my project?
Simply copy the border-radius property value from the generator and paste it into your CSS rule for the desired element. You can apply it to any HTML element—not just divs—including images, buttons, and containers. The tool also exports the complete CSS rule if you prefer to copy the entire block at once.
Can I set the same radius value for all corners at once?
The generator provides preset buttons for common shapes like circles and capsules that automatically apply equal values. You can also manually enter identical values in the corner fields and use the apply-to-all option to synchronize them instantly. This is useful for creating uniform rounded corners across your design quickly.
How do I create complex asymmetrical shapes?
Use the 8-value syntax which allows you to set different radii for horizontal and vertical axes on each corner, enabling oval and asymmetrical designs. The visual preview updates in real-time as you adjust values, helping you see exactly what shape you're creating. Combining different corner values produces creative shapes beyond standard circles and capsules.
Does border-radius work on all HTML elements?
Border-radius works on most elements including divs, images, buttons, and containers, but not on elements without a visual border or background like plain text spans. For replaced elements like images, the radius clips the image content itself within the rounded boundaries. Some elements may require additional CSS like overflow: hidden to properly display the rounded effect.
Does the generator show a real-time preview of the CSS?
Yes, the generator provides an instant visual preview that updates as you adjust each corner's radius value, showing you exactly how your element will appear. The preview panel displays the CSS code alongside the visual result, letting you verify the output before copying. This real-time feedback eliminates guesswork and speeds up the design process.