How to Add Rounded Corners to a Button with CSS – A Simple Guide

Rounded buttons are a key element in modern web design. They look clean, approachable, and visually appealing. Fortunately, adding rounded corners to buttons is incredibly easy with CSS.

In this blog, we’ll show you how to add rounded corners to a button using CSS, along with tips for customizing the radius for different styles and effects.

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🧱 Why Use Rounded Corners?

• Modern look: Rounded corners create a soft, user-friendly appearance.
• Visual consistency: They pair well with flat or minimalistic design styles.
• Improved UX: Subtle curves can guide the user’s eyes and create natural flow.

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✅ Basic Syntax: border-radius

To add rounded corners to any HTML element (like a button), use the border-radius property in CSS.

🔧 CSS Syntax:

button {
  border-radius: 8px;
}

• border-radius: Defines how round the corners should be.
• The higher the value, the more rounded the corner.

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🧾 Complete Example

🔤 HTML:

<button class="rounded-btn">Click Me</button>

🎨 CSS:

.rounded-btn {
  padding: 10px 20px;
  background-color: #3498db;
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

This will create a nicely styled button with soft, rounded corners.

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🎨 More Styling Options with border-radius

Value	Description
border-radius: 0;	Sharp corners (default)
border-radius: 5px;	Slightly rounded
border-radius: 50%;	Perfect circle (for square buttons)
border-radius: 0 20px 0 20px;	Asymmetrical corner styling

🧪 Example: Pill-Shaped Button

button {
  border-radius: 50px;
}

This works well with wide buttons to create a “pill” or capsule style.

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💡 Best Practices

• Use consistent rounding throughout your UI for a cohesive design.
• Combine with transition for smooth hover effects: transition: background-color 0.3s ease;
• Don’t overuse large radii unless intentionally styled (e.g., pill buttons).

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📌 Conclusion

Using border-radius is the simplest and most effective way to add rounded corners to a button in CSS. Whether you’re designing minimalist interfaces or full-featured applications, rounded buttons enhance both aesthetics and usability.

✅ Summary:

button {
  border-radius: 10px; /* Add rounded corners */
}

Rounded corners can completely change the feel of your button — making it more modern, soft, and user-friendly.