Free Online Screen Resolution Checker
Instantly detect your screen resolution, browser viewport dimensions, device pixel ratio, and color depth. All values update live when you resize your browser. No data is collected — everything runs in your browser.
About this tool
The screen resolution checker reads your display properties directly from your browser's window.screen and devicePixelRatio APIs.
- Screen and viewport resolution
- Device pixel ratio (Retina/HiDPI detection)
- Color depth and pixel depth
- Screen orientation
- Live updates on window resize
- Effective physical pixel calculation
100% free. No signup required. No data collected or sent anywhere.
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