Responsive Tester - Free Online Responsive Design Tester Tool | IconVault
Preview any URL at popular breakpoints and device sizes in a sandboxed iframe. iPhone, Pixel, iPad, laptop, desktop presets, plus rotate. Free.
Responsive Tester
Preview any URL at every breakpoint
No page loaded yet - full width x 600px
Enter a URL above to preview it
Switch between breakpoints and device presets to see how the page adapts.
Heads up: many sites block embedding via X-Frame-Options or frame-ancestors headers, so some pages will show a blank frame. Your own pages usually embed fine. Everything runs in your browser, nothing is uploaded.
5 of 5 free previews left.
About this tool
IconVault's Responsive Tester loads any URL into a sandboxed iframe at the breakpoints and device sizes that matter. Jump between 375px, 768px, 1024px and 1440px widths, use device presets for iPhone, Pixel, iPad, laptop and desktop, and rotate the viewport to check landscape layouts.
It runs entirely in your browser, so there is nothing to install and no screenshots uploaded anywhere. One honest caveat: some sites block embedding with X-Frame-Options, so a blank frame usually means the site refused to be embedded, not a bug in the tool.
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