How to Use the Responsive Breakpoint Tester

This tool allows you to test how your website appears at different screen sizes and device breakpoints. Simply enter a URL and click through the breakpoints to see your site's responsive behavior.

Common Breakpoints Explained

CSS Media Query Examples

/* Mobile First Approach */
/* Default styles for mobile (320px+) */
.container {
  padding: 10px;
}

/* Tablet (768px and up) */
@media (min-width: 768px) {
  .container {
    padding: 20px;
  }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
  .container {
    padding: 40px;
  }
}

Best Practices for Responsive Design

• Mobile-first approach: Start with mobile styles and add breakpoints for larger screens
• Test at multiple sizes: Don't just test at exact breakpoints; try sizes in between
• Flexible layouts: Use relative units (%, em, rem) instead of fixed pixels
• Touch-friendly: Ensure buttons and links are at least 44x44px for mobile
• Readable text: Maintain font size of at least 16px on mobile devices
• Optimize images: Use responsive images with srcset for different screen sizes
• Test navigation: Ensure menus work well on both mobile and desktop

Testing Tips

• Check that text is readable without zooming on mobile devices
• Verify that horizontal scrolling isn't required
• Ensure images scale properly and don't overflow containers
• Test form inputs and buttons for touch-friendliness
• Verify navigation menus work correctly at all sizes
• Check that content reflows naturally without awkward gaps