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Why does my page scroll sideways on a phone when nothing on it looks that wide?
What you'll have at the end
The overflowing element identified and fixed, confirmed at every width down to 320px
You need
A page or section that scrolls sideways on a narrow screen, with its CSS open to edit and a browser window you can resize.
Not covered
This does not cover a deliberately scrollable row, like a swipeable gallery of cards or images: that sideways scroll is the design itself.
Turn a wide, cramped data table into stacked mobile cards
the offending element turns out to be a data table rather than a flex or grid row: that recipe redesigns the table itself instead of just letting a box shrink.
Add the missing viewport meta tag
every number in this recipe's checks comes back at zero, yet the page still renders tiny and zoomed out on a phone: that points to a missing viewport tag instead of an overflowing element.
Checked 20 Aug 2026
Part of the Responsive Web Design cookbook