Free online screen resolution testing tool. Real-time detection of your screen resolution, pixel ratio, color depth, and window size. No installation required.
Real-Time Detection · Works OfflineReal-time detection of your screen and browser window parameters. | No registration · Data stays private
Test your screen color display capabilities. Click a color block to view it fullscreen.
Current browser viewport size.
Yes，Completely Freeusing，No Signup Requiredorlogin。
All processing is done locally in your browser. No data is uploaded to any server.
Browsers are affected by system scaling. DPR > 1 means scaling is enabled (e.g., Retina = 2).