UCSSR

CSS Border Radius Visualizer

Create and visualize beautiful border radius styles for your website

Border Radius Guide

The border-radius property rounds the corners of an element's outer border edge. It can create anything from subtle rounded corners to complex organic shapes, making it a versatile tool for modern web design.

Understanding border-radius is essential for creating modern, polished user interfaces. It helps soften harsh edges, create visual harmony, and can even be used to create complex shapes that enhance your design's personality.

Border Radius Anatomy

border-top-left-radius
40px
40px
border-top-right-radius
40px
40px
border-bottom-right-radius
40px
40px
border-bottom-left-radius
40px
40px
Each corner can have different horizontal and vertical radii
border-radius: [top-left] [top-right] [bottom-right] [bottom-left]
Single value
Applies to all corners
Two values
top-left/bottom-right, top-right/bottom-left
Four values
Each corner individually
Slash syntax
horizontal/vertical radii

Common Patterns

Border radius can be used in various ways to achieve different design goals. Here are some common patterns and when to use them:

border-radius: 8px;

Standard rounded corners for cards and containers

border-radius: 9999px;

Perfect circles for avatars and icons

border-radius: 40px;

Smooth, pill-shaped elements

Design Principles

Using border-radius effectively requires understanding some key design principles that help create cohesive and professional-looking interfaces.

1. Consistency

Maintain consistent border-radius values across your interface to create visual harmony:

  • • Use a scale system (e.g., 4px, 8px, 16px)
  • • Match component hierarchies
  • • Consider component size

2. Proportional Scaling

Adjust border-radius relative to element size:

  • • Larger elements = larger radius
  • • Maintain visual balance
  • • Consider content padding

3. Component Context

Adapt border-radius based on component type and usage:

Content card
Form input

4. Visual Harmony

Create balanced designs with border-radius:

Avatar with text
Icon with text

Advanced Techniques

Border-radius can be used to create complex shapes and interesting effects. Here are some advanced techniques:

border-radius: 0 40px 0 40px;

Diagonal corners

border-radius: 40px 40px 0 0;

Top rounded corners

border-radius: 20px 50px;

Asymmetric corners

Best Practices

Use consistent values across similar components

Scale radius with element size

Consider mobile touch targets

Common Mistakes

⚠️

Inconsistent radius values

⚠️

Radius too large for element size

⚠️

Mixing different radius styles

Quick Reference

Common border-radius values and their typical use cases in modern web design:

Small (4px)

border-radius: 4px;

Subtle rounding for small elements

Medium (6px)

border-radius: 6px;

Default for most components

Large (8px)

border-radius: 8px;

Cards and prominent elements

Extra Large (12px)

border-radius: 12px;

Feature sections and modals

Full (9999px)

border-radius: 9999px;

Circles and pills

None (0px)

border-radius: 0;

Sharp corners