What are the most common issues in non-responsive websites?

The most common issues in non-responsive websites include fixed-width layouts that overflow on smaller screens, font sizes that are unreadable without pinch-to-zoom, navigation menus that collapse into unusable states on mobile, and touch targets (buttons and links) that are too small or too close together for accurate tapping.

Additional issues include uncompressed images that are sized for desktop and slow down mobile load times significantly, horizontal scroll bars that appear when content exceeds the viewport, and forms with date pickers or dropdowns that do not adapt to mobile input conventions. These problems compound to produce high mobile bounce rates, low engagement, and search ranking penalties from Google’s Core Web Vitals assessment, which now factors page experience into organic ranking decisions.