In today’s multi-device world, responsive design is essential. With users accessing websites from smartphones, tablets, and desktops, your site needs to deliver an excellent experience across all screen sizes. Here are the key best practices to get it right.
Start with Mobile-First
Design for the smallest screens first, then enhance for larger devices. This approach forces you to prioritise essential content and features, resulting in cleaner designs across all devices. As you scale up, you’re adding enhancements rather than stripping away complexity.
Use Flexible Layouts
Embrace fluid grids using relative units like percentages instead of fixed pixels. CSS Grid and Flexbox make creating flexible layouts easier than ever, allowing your design to adapt smoothly to any screen size without complicated calculations.
Implement Smart Breakpoints
Don’t design for specific devices-let your content determine where breakpoints should occur. Test your design at various widths and add breakpoints where the layout begins to feel cramped. Common ranges include 480px, 768px, 1024px, and 1200px+, but adjust based on your needs.
Optimise Images
Images are often the heaviest elements on a webpage. Use the srcset attribute to serve different image sizes based on screen size, implement lazy loading for below-the-fold images, and consider modern formats like WebP for better compression.
Design for Touch
Mobile users interact with fingers, not mouse cursors. Make interactive elements at least 44×44 pixels for easy tapping, and place important actions within thumb’s reach in the lower portion of mobile screens.
Scale Typography Appropriately
Use relative units like rem for font sizes so text scales properly across devices. Maintain readable line lengths (50-75 characters) and ensure mobile text is large enough to read comfortably without zooming.
Test Across Real Devices
Browser developer tools are helpful, but nothing replaces testing on actual devices. Check your site on various phones, tablets, and desktops to ensure everything works as intended. Pay attention to performance, not just appearance.
Conclusion
Responsive design is about creating experiences that work beautifully for everyone, regardless of how they access your site. By following these best practices-starting mobile-first, using flexible layouts, optimising images, and testing thoroughly-you’ll build websites that delight users across all devices. Remember, responsive design is an ongoing process, not a one-time task. Keep testing, iterating, and improving as new devices and screen sizes emerge.

