Responsive HTML Testing

Test desktop, tablet, and mobile layouts with preview width controls and media-query checks.

コーディングを始める

手順

Build the layout at desktop width first.
Switch to tablet and mobile preview widths.
Adjust CSS with media queries.
Recheck interactive elements at each width.
Validate that text remains readable without horizontal page scroll.

ヒント

The viewport label shows the current preview frame width so you can align tests with common breakpoints.

関連ツール