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Responsive Breakpoint Preview

Load any URL in an iframe and quickly switch between device widths.

Responsive Preview – Test Websites at Different Screen Sizes

Responsive design ensures websites look and work well on all devices. The Responsive Preview tool allows you to load any URL in an iframe and quickly switch between different device widths, making it easy to test how websites appear on mobile phones, tablets, and desktop computers.

Whether you're developing a responsive website, testing breakpoints, or reviewing how existing sites adapt to different screen sizes, this tool provides instant previews at common device widths.

Common Breakpoints

  • Mobile (375px): Standard smartphone width in portrait orientation
  • Tablet (768px): Typical tablet width, often used as tablet breakpoint
  • Desktop (1024px): Standard laptop/desktop screen width
  • Wide (1440px): Large desktop displays and wide screens

Responsive Design Testing

Use this tool to:

  • Test website layouts at different screen sizes
  • Verify responsive breakpoints work correctly
  • Check mobile navigation and UI elements
  • Ensure content is readable at all sizes
  • Compare your site to competitors

Conclusion

The Responsive Preview tool helps you quickly test websites across different screen sizes, ensuring your responsive designs work correctly on all devices.