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Screen Resolution Tester

Developer

Free online screen resolution tester. Preview any viewport size with device presets for responsive design testing.

0
0
1920 × 1080
Resolution
1.778
Aspect Ratio
2.07 MP
Total Pixels
576 × 324
Scaled @ 30%
1920 × 10801.778

Scaled preview - actual viewport is 1920×1080px

Open 1920×1080 in New Window

Whether a navigation menu collapses into a hamburger icon at the right width, or a three-column layout properly drops to one column on a narrower screen, is a question about how a page's structure reflows across different viewport sizes, a layout and breakpoint concern that's completely separate from how sharp an individual image looks on a dense pixel grid. This tool previews any viewport size with device presets for responsive design testing, checking layout structure and breakpoint behavior specifically rather than pixel density or image sharpness.

See more about the Screen Resolution Tester

Useful for confirming a navigation menu actually collapses at the intended breakpoint before shipping a responsive layout, checking how a multi-column grid reflows across a range of device widths, or previewing a page at a specific viewport size to catch a layout that breaks somewhere between two device presets.

Key features

  • Clean interface
  • Fast processing
  • No signup required
  • Works offline

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Quick answers for Screen Resolution Tester

How many device presets are included?
Thirteen, spanning phones like iPhone SE and Pixel 8, tablets like iPad Mini and iPad Pro, laptops, and fixed resolutions up to 4K UHD, each showing its exact pixel dimensions on the button.
What stats does it calculate besides the resolution?
Aspect ratio to three decimal places, total pixel count (shown in megapixels once it passes one million), and a scaled-down preview rendered at 30% size so large resolutions still fit on screen.
Can I actually open a window at that resolution?
Yes, an "Open in New Window" link launches a blank browser window sized to your exact width and height, letting you test the real viewport rather than just the scaled preview.