CSS viewport 1920 × 1080 pixels at 1× device pixel ratio. The exact size browsers report on the Full HD (1080p).
The Full HD (1080p) viewport is 1920 × 1080 CSS pixels, with a device pixel ratio of 1 on a 1920 × 1080 pixel display.
Test your site at Full HD (1080p) (1920 × 1080)
When a user visits your site on the Full HD (1080p), the browser reports window.innerWidth = 1920 and window.devicePixelRatio = 1. Your CSS media queries match against the 1920px CSS width, not the 1920 × 1080 physical pixel count of the panel.
At 1920px it hits Tailwind 2xl (1536px) and Bootstrap xxl (1400px).
For sharp full-width images, serve a source at least 1920px wide (1920 CSS px × 1 DPR) through srcset and let the browser pick it.
/* Full HD (1080p): 1920×1080 CSS px, DPR 1 */
@media (max-width: 1920px) {
/* styles for this width and narrower */
}
@media (min-resolution: 1dppx) {
/* serve high-density assets */
}The Full HD (1080p) reports a CSS viewport of 1920×1080 pixels. Browser toolbars reduce the visible height slightly, so window.innerHeight is usually smaller than the full screen height.
The Full HD (1080p) uses a default device pixel ratio of 1. Each CSS pixel maps to 1×1 physical pixels on its 1920×1080 panel.
At 1920px wide it matches Tailwind 2xl (min-width 1536px) and Bootstrap xxl (min-width 1400px).
Open screensize.io, enter your URL and pick Full HD (1080p) (1920×1080). It opens your site in a real browser window at exactly that CSS viewport, so media queries, container queries and JavaScript resize logic behave as they would on the device. For touch behaviour and the real browser engine, confirm on hardware before shipping.
See the full list of device viewport sizes →
Or browse common screen sizes by category →
Use screensize.io to preview your website at any of these resolutions instantly — no DevTools needed.
Open screensize.io →