CSS Border Radius Generator

BorderRadius Generator
Simple Radius ▾
All 20px
Corners ▾
TL
TR
BR
BL
Top Left 20px
Top Right 20px
Btm Right 20px
Btm Left 20px
Presets ▾
border-radius: 20px
W: 200px H: 200px





Copied!
 \n';
var blob = new Blob([html], {type:'text/html'});
var a = document.createElement('a');
a.href = URL.createObjectURL(blob); a.download = 'border-radius-preview.html'; a.click();
toast('Downloaded!');
});// ── SHAPE SWITCHER ────────────────────────────────────────────────────────────
qsa('.br-mode-btn').forEach(function(btn) {
btn.addEventListener('click', function() {
qsa('.br-mode-btn').forEach(function(b){ b.classList.remove('active'); });
btn.classList.add('active');
var shape = btn.dataset.shape;
var dim = SHAPES[shape];
if (dim) { S.w=dim.w; S.h=dim.h; }
syncSliderUI();
updateAll();
});
});// ── PRESETS ───────────────────────────────────────────────────────────────────
qsa('.br-preset-btn').forEach(function(btn) {
btn.addEventListener('click', function() { applyPreset(btn.dataset.preset); });
});// ── SECTION COLLAPSE ─────────────────────────────────────────────────────────
qsa('.br-section-title[data-sec]').forEach(function(title) {
title.addEventListener('click', function() {
var sec = title.closest('.br-section');
sec.classList.toggle('collapsed');
});
});// ── CORNER DOTS ──────────────────────────────────────────────────────────────
qsa('.br-corner-dot').forEach(function(dot) {
dot.addEventListener('click', function() {
qsa('.br-corner-dot').forEach(function(d){ d.classList.remove('active'); });
dot.classList.add('active');
});
});// ── INIT ─────────────────────────────────────────────────────────────────────
initBindings();
initDragHandles();
syncSliderUI();
updateAll();})();

Creating rounded corners is one of the easiest ways to make a website look modern and professional. Our CSS Border Radius Generator helps developers and designers generate custom border-radius values, preview changes in real time, and copy ready-to-use CSS code without manually testing different values.
Whether you’re styling buttons, cards, images, forms, or dashboard components, this tool makes it simple to create clean and consistent rounded corners for any project.
What Is a CSS Border Radius Generator?
A CSS Border Radius Generator is a tool that helps you create rounded corners for HTML elements using the CSS border-radius property. Instead of manually editing CSS values and refreshing your browser repeatedly, you can visually adjust corner radii and instantly see the result.
Rounded corners are commonly used in modern web design because they make interfaces look more approachable and visually appealing. A generator speeds up the process by producing accurate CSS code automatically.
Benefits of Using a Border Radius Generator
  • Save time during development
  • Preview changes instantly
  • Customize each corner independently
  • Generate clean CSS code
  • Improve UI consistency
How to Use the CSS Border Radius Generator
Using the tool is straightforward, even if you’re new to CSS.
Step 1: Adjust Radius Values
Move the sliders or enter custom values to control corner rounding.
Step 2: Customize Individual Corners
Set unique values for:
  • Top Left
  • Top Right
  • Bottom Right
  • Bottom Left
Step 3: Preview Changes
Watch the shape update instantly as you change values.
Step 4: Copy Generated CSS
The tool automatically generates the required CSS code.
Step 5: Paste Into Your Project
Copy the generated code and add it to your stylesheet.
How CSS Border Radius Works
The border-radius property controls how rounded the corners of an element appear.
A larger value creates more rounded corners, while smaller values produce subtle rounding.
Example:
.box {
 border-radius: 12px;
}
This applies a 12px radius to all four corners.
Why Developers Use Border Radius
Rounded corners can:
  • Improve visual hierarchy
  • Create a modern appearance
  • Make buttons more clickable
  • Enhance mobile UI design
  • Match contemporary design systems
CSS Border Radius Syntax Explained
Single Value Radius
One value applies to all corners.
border-radius: 12px;
Result:
  • Top Left = 12px
  • Top Right = 12px
  • Bottom Right = 12px
  • Bottom Left = 12px
Two Value Radius
border-radius: 20px 10px;
Result:
  • Top Left & Bottom Right = 20px
  • Top Right & Bottom Left = 10px
Three Value Radius
border-radius: 20px 10px 30px;
Result:
  • Top Left = 20px
  • Top Right & Bottom Left = 10px
  • Bottom Right = 30px
Four Value Radius
border-radius: 10px 20px 30px 40px;
Result:
  • Top Left = 10px
  • Top Right = 20px
  • Bottom Right = 30px
  • Bottom Left = 40px
Elliptical Radius
Elliptical radii create more organic and custom shapes.
border-radius: 50% / 25%;
This technique is commonly used for:
  • Ovals
  • Organic blobs
  • Decorative UI shapes
CSS Border Radius Examples
Rounded Button
button {
 border-radius: 8px;
}
A popular choice for modern buttons.
Rounded Card
.card {
 border-radius: 16px;
}
Ideal for content cards and containers.
Circular Image
.avatar {
 border-radius: 50%;
}
Perfect for profile pictures and avatars.
Pill Button
button {
 border-radius: 9999px;
}
Creates a fully rounded pill-style button.
Organic Blob Shape
.shape {
 border-radius: 60% 40% 70% 30%;
}
Useful for creative layouts and modern landing pages.

What Is a CSS Border Radius Generator?
Common Border Radius Values and Presets
Radius Value
Typical Usage
Design Style
4px
Small UI Elements
Minimal
8px
Buttons
Modern
12px
Cards
Professional
16px
Containers
Contemporary
20px
Large Cards
Premium
24px
Hero Sections
Soft Design
50%
Circles
Avatars
9999px
Pills
Mobile UI
Popular Use Cases for CSS Border Radius
Buttons
Rounded buttons often improve perceived usability and clickability.
Cards
Most modern websites use rounded content cards for better visual separation.
Images
Border radius helps create circular profile photos and softer image corners.
Forms
Rounded input fields feel more user-friendly and modern.
Navigation Menus
Many navigation bars use subtle corner rounding to match contemporary design trends.
SaaS Dashboards
Dashboard widgets frequently use border-radius values between 8px and 16px.
Mobile Applications
Mobile interfaces commonly rely on larger radius values for a polished appearance.
Border Radius Preset Library
Square Style
border-radius: 0;
No rounding.
Soft Rounded Style
border-radius: 8px;
Great for everyday UI components.
Modern Card Style
border-radius: 16px;
Widely used in dashboards and web apps.
Circle Style
border-radius: 50%;
Creates perfect circles on square elements.
Pill Style
border-radius: 9999px;
Common for tags, badges, and buttons.
Blob Style
border-radius: 60% 40% 70% 30%;
Creates organic and artistic shapes.
CSS Border Radius Best Practices
Maintain Consistent Radius Values
Use the same radius scale throughout your project to improve visual consistency.
Follow Design Systems
Many design systems use predefined radius scales such as:
  • 4px
  • 8px
  • 12px
  • 16px
  • 24px
Avoid Excessive Rounding
Too much rounding can make interfaces feel inconsistent and cluttered.
Consider Mobile Devices
Always preview rounded elements on different screen sizes.
Match Radius to Element Size
Larger elements can support larger radius values without looking awkward.
Border Radius vs Border vs Clip Path
Property
Purpose
Best Use Case
Border Radius
Rounds corners
Buttons, Cards, Images
Border
Adds outlines
Visual separation
Clip Path
Creates custom shapes
Advanced graphics
When to Use Border Radius
Choose border-radius when you simply need rounded corners.
When to Use Border
Use borders to define element boundaries.
When to Use Clip Path
Use clip-path for complex custom shapes that border-radius cannot create.
Modern UI Border Radius Trends
Material Design
Google’s Material Design often uses radius values around 4px to 12px.
SaaS Dashboards
Most modern dashboards use 12px to 16px corner rounding.
Mobile Apps
Mobile interfaces frequently use larger radii for touch-friendly designs.
Glassmorphism
Glassmorphism designs commonly feature radius values between 16px and 24px.
Neumorphism
Soft UI designs often combine large border radii with subtle shadows.
Why Use Our CSS Border Radius Generator?
Our tool is designed to simplify CSS styling while improving productivity.
Key Features
  • Live visual preview
  • Instant CSS generation
  • Individual corner controls
  • Easy copy-and-paste functionality
  • Beginner-friendly interface
  • Mobile responsive design
  • Free to use
Whether you’re building a landing page, dashboard, eCommerce store, or mobile app, our generator helps you create clean and professional rounded corners faster.
Related CSS Tools
To improve your workflow, you may also find these tools helpful:
Final Thoughts
A CSS Border Radius Generator makes it easy to create modern, visually appealing rounded corners without manually experimenting with CSS values. Whether you’re designing buttons, cards, forms, images, or entire user interfaces, this tool helps you generate accurate CSS code quickly and maintain a consistent design across your projects.
Frequently Asked Questions





 What does border-radius do in CSS?





The border-radius property rounds the corners of an HTML element.






Use:
border-radius: 50%;
on a square element.






Yes.
border-radius: 10px 20px 30px 40px;
assigns different values to each corner.






An elliptical radius uses horizontal and vertical values to create oval or custom shapes.






No. Border-radius is lightweight and has minimal performance impact.






Most modern interfaces use values between 6px and 12px.






Yes. Percentage values and responsive CSS techniques can adapt to different screen sizes.






Yes. You can generate, preview, and copy CSS code completely free.