Responsive Website Tester

Responsive Website Tester | Ambidextrous Tools
✦ Ambidextrous Tools · Tool 15

Responsive Website Tester

See how your website fits different screen sizes. Choose a mobile, tablet, laptop, desktop monitor or TV preset — or enter your own dimensions.

ONE WEBSITE · MULTIPLE SCREEN SIZES
Live Preview
390 × 844 CSS pixels · Mobile
Preview canvas
ZOOM: Fit
▣
Your website preview appears here

Enter a website URL above, then tap Preview to inspect.

Preview displays the exact viewport resolution in CSS pixels matching standard device specifications.

Quick Comparison
01 · Pick a preset

Switch between common mobile, tablet, laptop, desktop and TV viewport sizes.

02 · Adjust dimensions

Enter a custom width and height to inspect unusual screen sizes and breakpoints.

03 · Compare layouts

Load the same URL in multiple viewport previews to compare responsive behavior.

Made for creators by Ambidextrous Tools · Responsive Website Tester