Screen Resolution Checker
See the screen and browser dimensions your browser reports.
Resize this window or rotate your device to update the readings. CSS pixels describe layout space, not necessarily individual pixels on the physical display.
Live measurements appear here when this page runs in your browser with JavaScript enabled.
About these readings: screen size in CSS pixels and device pixel ratio.
About Screen Resolution Checker
Check browser-reported screen dimensions, available screen area, layout and visible viewports, device pixel ratio and aspect ratio. Readings update when you resize the window, rotate your device, change pixel density or return to the tab. Use the report when explaining a layout issue or comparing responsive designs. Measurements are read locally; the tool does not request access to other displays.
Frequently Asked Questions
Not necessarily. Browsers report screen size in CSS pixels. Operating-system scaling, page zoom and privacy protections affect the readings. Check your device’s display settings for its configured resolution or its specifications for the panel’s native resolution.
The screen describes the display area exposed to the browser. The layout viewport describes the browser window’s inner area. The visible viewport can shrink further with pinch zoom or an on-screen keyboard. Multiple monitors and privacy modes may limit what is reported.
No. These browser APIs do not reliably reveal those values. Device pixel ratio combines scaling effects, while visible viewport scale is a different measurement. No monitor model, refresh rate, inches or exact desktop zoom is inferred.