CSS Border Radius Generator

Generate border-radius for any element — control each corner, use px or %, try presets, and copy ready-to-use CSS.

Configuration

12px

12px
12px
12px
12px
You can set complex border-radius values like 10px 20px 30px 40px / 50% 40%

Preview

Preview

CSS Code

border-radius: 12px;

CSS Border Radius Generator – Create Perfect Rounded Corners Instantly

When you're making websites now, things like buttons, cards, images, and text boxes usually need nice, soft, rounded corners. Typing out the CSS for each corner can be a pain, especially if you want each one to be a bit different. That's where our CSS Border Radius Generator comes in. It's a simple, fast, and easy-to-use tool that lets you make cool rounded shapes without having to mess around with code. So, if you're a web designer, a front-end developer, or just starting out with CSS, this tool can help you style things faster.

We made this tool for everyone, beginners to experts. You can control each corner, pick between pixels and percentages, use fancy oval shapes, and even copy the CSS code with just one click. You can see how the shape looks as you change things, move sliders around, and get your design just right. This makes our online border radius generator a must-have for anyone working on the web.

What is a CSS Border Radius Generator?

A CSS Border Radius Generator is an online tool that helps you create rounded corners easily by adjusting sliders or input values. Instead of guessing the right radius or writing trial-and-error CSS, this tool lets you visually modify the shape of an element and instantly see the result. You can adjust all four corners together or individually, allowing you to build anything from slight rounding to completely circular elements.

The generator supports single value border radius, multi-corner radius, and even complex elliptical styles such as 20px 40px / 50px 10px. These advanced forms are usually difficult to write manually, which is why designers prefer using our border radius generator online to achieve precision and save time. Once your design is ready, simply copy the CSS and apply it to your HTML element.

Features of Our Free CSS Border Radius Generator

  • Live Preview Panel: See real-time changes as you modify the radius values.
  • Individual Corner Control: Customize top-left, top-right, bottom-right, and bottom-left corners separately.
  • Unified Slider: Apply the same radius to all corners with a single action.
  • Pixel and Percentage Units: Choose between px for fixed radius or % for flexible, responsive designs.
  • Elliptical Support: Generate advanced shapes using the slash (/) syntax.
  • Predefined Shapes: Set your element to Rounded, Pill, Circle, Sharp, or custom presets instantly.
  • One-click Copy Button: Copy the generated CSS code directly into your clipboard.
  • Responsive & Beginner-Friendly: Works smoothly across devices, and requires no coding experience.

Why Use a Border Radius Generator?

Manually writing border-radius values is simple for basic shapes, but when you need different corner sizes or advanced elliptical curves, the code becomes long and harder to maintain. A border radius generator removes the guesswork by letting you design visually. You immediately see what works, what feels balanced, and what fits your UI layout. This makes the design process faster, more intuitive, and more accurate.

For developers or designers who regularly create buttons, cards, images, or modern UI blocks, using an online border radius generator increases efficiency. It’s particularly useful when designing neumorphism, glassmorphism, material UI elements, or other modern design styles that rely heavily on smooth, rounded edges. Instead of manually tweaking values, you can achieve the perfect look in seconds.

How to Use the CSS Border Radius Generator?

  1. Select a preset shape like Rounded, Circle, or Pill—or start with the default rectangle.
  2. Use the sliders to adjust top-left, top-right, bottom-right, and bottom-left corners independently.
  3. Switch between px and % units depending on the design requirement.
  4. For elliptical radius: enter custom values like 30px 60px / 40px 20px in the advanced input box.
  5. Use the preview box to see your shape change in real time as you update the values.
  6. Copy the generated CSS code using the one-click copy button.
  7. Paste the CSS into your stylesheet or directly in your HTML element’s style attribute.

This intuitive workflow makes the generator suitable for both beginners and experts. You don’t need to memorize CSS syntax or experiment manually. Everything is automated, visual, fast, and error-free.

Why Border Radius is Important in Web Design?

Rounded corners have become a key part of modern UI design. They create a smooth, friendly, and minimal appearance that improves user experience. Sharp edges often feel outdated, while rounded shapes give elements a softer and more balanced look. This is why border-radius is widely used in buttons, badges, cards, modals, input boxes, profile pictures, and even layouts.

In responsive design, using percentage units in border-radius ensures that elements adapt beautifully on different screen sizes. When combined with CSS animations, shadows, gradients, and transitions, rounded elements make your UI look polished and professional. A border radius generator online speeds up this process and helps you achieve pixel-perfect results every time.

Best Practices for Using Border Radius

  • Use subtle rounding (4px–12px) for cards and content boxes.
  • Use 50% border radius for perfectly circular images or icons.
  • Use pill shapes for buttons by setting a high radius value.
  • Experiment with elliptical shapes to create creative UI components.
  • Keep your radius consistent across your website for a uniform design.

Our border radius generator makes it easy to follow these best practices by giving you full control over every aspect of the corner curve.

Related Tools

Improve your workflow with our other CSS tools, including: CSS Box Shadow Generator, CSS Flexbox Generator, and CSS Grid Generator. These tools help you design layouts more efficiently and ensure your website looks modern and polished.

Conclusion

Our Free CSS Border Radius Generator Online is an essential tool for anyone building modern websites. It helps you create smooth, rounded corners, custom elliptical shapes, pill buttons, circles, and more—all without writing a single line of manual CSS. Whether you're a developer or a designer, this tool saves time, eliminates guesswork, and enhances your creativity. Use it to design clean, modern UI elements faster and with greater precision. Try the generator now and make your web elements look visually stunning and professional.