CSS Border Generator
Create custom borders with precise control over width, style, color, and radius
Controls
Adjust the settings to customize your CSS
Border Style
Border Width
Border Radius
Border Color
Live Preview
See your changes in real-time
Presets
Choose from pre-designed effects or start with a template
Presets
Generated Code
Copy the CSS or Tailwind classes to use in your project
border: 2px solid #9ca3af;
border-radius: 4px;What are CSS Borders?
CSS borders are decorative lines that surround HTML elements, defining their boundaries and adding visual structure to web pages. Unlike outlines, borders are part of the element's box model and affect layout.
Essential for creating visual hierarchy, defining clickable areas, and improving the overall structure and usability of web interfaces.
CSS Border Syntax
border: width style color;
/* Example */
border: 2px solid #3b82f6;
Width Properties
Overall thickness
Individual side control
Style Properties
Line appearance
Style options
Radius Properties
Corner rounding
Precise corner control
Popular Use Cases
UI Components
Define buttons, form fields, and interactive element boundaries
Layout Structure
Create visual hierarchy and separate content sections
Visual Design
Add style and polish with decorative border effects
Accessibility
Improve focus indicators and element identification
Advanced Techniques
1 Individual Border Sides
Control each border side independently for asymmetric designs:
border-top: 4px solid #ef4444; /* Red top border */
border-right: 1px solid #e5e7eb; /* Light gray right */
border-bottom: 1px solid #e5e7eb; /* Light gray bottom */
border-left: 1px solid #e5e7eb; /* Light gray left */ 2 Custom Corner Radius
Create unique shapes with individual corner radius values:
border: 3px solid #3b82f6;
border-radius: 20px 5px 20px 5px; /* Alternating corners */ Best Practices
Do This
- Use consistent border widths throughout your design
- Choose appropriate colors with sufficient contrast
- Use border radius strategically for visual hierarchy
- Test borders across different devices and screens
Avoid This
- Overusing complex border styles in single designs
- Animating border properties on performance-critical elements
- Using borders that reduce accessibility or readability
- Mixing too many border styles without purpose
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Frequently Asked Questions
? What's the difference between border and outline?
Border is part of the element's box model and affects layout, while outline is drawn outside the element and doesn't affect layout. Outline is typically used for focus indicators.
? How do I create borders that don't affect layout?
Use box-shadow with zero blur and spread values, or the outline property. Both techniques add visual borders without affecting the element's dimensions or position in the layout.
? Can I use gradients for borders?
Yes! Use the border-image property with gradients, or create a wrapper element with gradient background and an inner element with solid background color to achieve gradient border effects.
? What's the maximum useful border radius value?
Border radius values above 50% create the same circular effect as 50%. For most practical purposes, 50% is the maximum useful value, creating perfect circles or fully rounded rectangles.