CSS Border Radius Generator

What is CSS Border Radius?

CSS border-radius is a property that rounds the corners of elements, transforming sharp rectangular corners into smooth curves. This simple property has become fundamental to modern web design, enabling softer, more approachable interfaces. Border-radius works on any element including divs, buttons, images, inputs, and more, and accepts various units for flexible, responsive designs.

This border radius generator provides an intuitive interface for creating perfect rounded corners. Control all four corners simultaneously or individually, choose between pixels, rem, and percentage units, see changes in real-time with live preview, try preset styles, and copy the generated CSS code. Whether you need subtle corner softening or dramatic circular shapes, this tool makes border-radius easy.

How to Use the Border Radius Generator

1. Choose Control Mode: Toggle between controlling all corners together (uniform rounding) or individually (custom shapes). Uniform mode is faster for most use cases.
2. Select Unit: Choose between pixels (px) for absolute values, rem for scalable values, or percentage (%) for responsive shapes like circles.
3. Adjust Values: Use the number inputs to set corner roundness. For uniform mode, one value controls all corners. For individual mode, set each corner separately.
4. Preview in Real-Time: The preview box shows how your border-radius appears on an actual element, updating instantly as you adjust values.
5. Try Presets: Click preset buttons for common styles including none (0), small (4px), medium (8px), large (16px), circle (50%), and organic shapes.
6. Copy CSS Code: Click copy to copy the generated border-radius CSS to your clipboard, then paste into your stylesheet.

Common Use Cases

• Buttons and CTAs: Round button corners to make them feel clickable and friendly. Most modern buttons use 4-8px border-radius.
• Cards and Panels: Apply subtle rounding to cards, panels, and containers for a polished, modern appearance that softens the interface.
• Images and Avatars: Use 50% border-radius on square images to create perfect circular avatars and profile pictures.
• Input Fields: Round input field corners slightly (4-6px) to distinguish them from static content and make forms feel more approachable.
• Navigation Elements: Round tabs, pills, and navigation items to create cohesive navigation systems with smooth transitions.
• Badges and Tags: Create pill-shaped badges and tags using large border-radius values or 50% on rectangular elements.
• Modal Dialogs: Apply moderate border-radius (12-16px) to modals and dialogs to soften their appearance and make them feel less intrusive.

Best Practices

• Maintain Consistency: Define standard border-radius values in your design system (e.g., small: 4px, medium: 8px, large: 16px) and use them consistently.
• Consider Element Size: Larger elements can handle more aggressive rounding, while small elements look better with subtle rounding.
• Match Your Brand: Professional brands typically use subtle rounding (4-8px), while friendly brands might use more generous rounding (12-20px).
• Test Responsively: Ensure your border-radius values work well at all screen sizes, especially when using percentage values that scale with element dimensions.
• Combine with Other Properties: Border-radius works great with box-shadow, backgrounds, and borders to create polished UI components.
• Use Semantic Values: Define CSS custom properties for border-radius values so you can update your design system globally without find-and-replace.

Privacy and Security

This border radius generator operates entirely in your web browser using client-side JavaScript. Your design choices never leave your device. No data is transmitted to servers or stored anywhere. All generation and preview rendering happens locally, ensuring complete privacy for your design work.