CSS Border Radius Generator

Easily Create Animated Blobs

Guide To CSS Border Radius

And Blob Animations

Modern web design often calls for organic, fluid shapes that break away from rigid rectangles and squares. The CSS border-radius property has evolved far beyond simple rounded corners, enabling designers to create complex shapes and engaging animations. Our Border Radius Generator makes it easy to explore these possibilities and create stunning visual elements for your websites.

Understanding Advanced Border Radius

While many developers are familiar with the basic border-radius property, its full potential lies in its eight-value syntax:

border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;

This syntax allows you to control both the horizontal and vertical radii of each corner independently, creating a vast array of possible shapes:

• First four values: Control the horizontal radius of each corner
• Last four values: Control the vertical radius of each corner
• The slash (/): Separates horizontal and vertical values

Features of Our Border Radius Generator

Our generator is designed to make complex border-radius creation accessible and intuitive:

• Visual Editor: Drag handles to adjust corner radii in real-time
• Animation Support: Create fluid transitions between different shapes
• Preset Shapes: Quick access to common shapes like circles, eggs, and custom blobs
• Custom Timing Functions: Fine-tune animations with various easing curves
• Live Preview: See your changes instantly as you make them
• Grid Overlay: Precise visual guidance for shape creation

Creating Basic Shapes

Start with these fundamental shapes to understand the border-radius property:

1. Perfect Circle

.circle {
  border-radius: 50%;
}

2. Ellipse

.ellipse {
  border-radius: 50% / 50%;
}

3. Capsule

.capsule {
  border-radius: 9999px;
}

Designing Animated Blobs

Blob animations add organic movement to your designs. Here's how to create them effectively:

1. Define Your States

Create two or more shape states that your blob will animate between:

• Start State: Your blob's initial shape
• Middle State: The intermediate form during animation
• End State: Often the same as the start state for smooth loops

2. Choose Your Animation Timing

Select from various timing functions to create different movement effects:

• Ease-in-out: Smooth, natural movement
• Elastic: Bouncy, playful animations
• Linear: Consistent speed throughout
• Custom: Fine-tuned cubic-bezier curves

Best Practices for Blob Design

Performance Considerations

Keep these tips in mind for optimal performance:

• Limit animation duration to 2-3 seconds for best results
• Use reasonable radius values to prevent extreme distortions
• Consider reducing animation complexity on mobile devices
• Test performance with multiple animated elements

Design Guidelines

Follow these principles for professional-looking results:

• Maintain symmetry when appropriate for natural-looking shapes
• Use subtle animations for background elements
• Ensure animations don't distract from content
• Match animation timing to your site's overall feel

Practical Applications

1. Hero Section Backgrounds

Create engaging hero sections with animated backgrounds:

.hero-blob {
  position: absolute;
  width: 600px;
  height: 600px;
  animation: blobAnimation 3s infinite ease-in-out;
}

2. Call-to-Action Buttons

Design unique button shapes that transform on hover:

.cta-button {
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  transition: all 0.3s ease;
}

.cta-button:hover {
  border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
}

Advanced Animation Techniques

Multiple State Animations

Create complex animations by transitioning through multiple shapes:

@keyframes complexBlob {
  0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
  25% { border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%; }
  50% { border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%; }
  75% { border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%; }
  100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
}

Cross-Browser Compatibility

Our generator produces code that works across all modern browsers. However, keep these points in mind:

• All modern browsers support complex border-radius values
• Animation support is universal in current versions
• Older browsers may need fallback shapes
• Performance varies by browser and device

Tips for Creative Shape Design

Maximize the potential of our generator with these creative approaches:

• Combine multiple blob elements for complex compositions
• Layer shapes with different opacity levels
• Use contrasting animation timings for dynamic effects
• Experiment with color transitions alongside shape changes

Conclusion

The CSS border-radius property, especially when combined with animations, opens up a world of creative possibilities for web design. Our Border Radius Generator makes it easy to explore these possibilities and create engaging, organic shapes that can enhance any website's visual appeal.

Whether you're designing a modern, blob-based layout or simply need perfectly rounded corners, our tool provides the precision and flexibility you need to achieve your design goals.

Thank you so much for your time and support!

Last Updated: 2/22/2025 | Version 1.0