Find your device resolution, browser viewport, pixel ratio, orientation, color depth, and platform instantly. This is helpful for responsive design, screenshots, debugging, and checking display information quickly.
Screen resolution is the full pixel size reported by your display. Viewport is the visible browser area available to a website. They are often different because browser bars, zoom, operating system scaling, and responsive layouts change the usable area.
Device pixel ratio explains the relationship between CSS pixels and physical screen pixels. High-DPI screens often use a higher ratio so text and graphics look sharp while layout sizes remain readable.
| Result | What it usually means |
|---|---|
| Low or unstable numbers | Check power mode, browser settings, drivers, background apps, and device temperature. |
| Different result in another browser | Browser engines, extensions, and hardware acceleration settings can change test behavior. |
| Good result but bad gaming feel | Game settings, ping, input lag, in-game FPS, or frame pacing may be the real issue. |
The browser interface, address bar, scrollbars, zoom, and OS scaling reduce the available web page area.
DPR means device pixel ratio. A DPR of 2 means one CSS pixel maps to about two physical pixels in each direction.
Operating system scaling and browser zoom can change how websites report and use pixels.
No. This tool reports pixels, not physical inches.
Yes. It is useful for checking responsive breakpoints, viewport widths, and high-DPI behavior.
Yes. Rotate your device or resize the browser and the values should update.
Mobile address bars can hide or show, changing the viewport height.
The values are read locally by the browser and shown on the page.