Screen Resolution Checker
Screen → Resolution Info
Instantly check your screen resolution, viewport size, device pixel ratio, aspect ratio, color depth, and orientation. See if you are HD, Full HD, 4K, or Retina — 100% client-side.
About this tool
About Screen Resolution Checker
Screen Resolution Checker is a free, browser-based tool that lets you instantly check your screen resolution, viewport size, device pixel ratio, aspect ratio, color depth, and orientation. See if you are HD, Full HD, 4K, or Retina — 100% client-side. It supports Screen → Resolution Info. Everything runs locally on your device, so your files are never uploaded to a server. There's no sign-up, no watermark, and no limit — just open Screen Resolution Checker, add your input, and get results instantly.
How to use Screen Resolution Checker
1
Open the Screen Resolution Checker
Open the tool in your browser. Your display information is detected automatically.
2
View your screen details
Check your screen resolution, viewport size, device pixel ratio, aspect ratio, color depth, and orientation.
3
Resize or rotate your device
Resize your browser window or rotate your device to see the detected resolution and viewport values update in real time.
4
Understand the results
Use the displayed metrics to identify your display class, such as HD, Full HD, 4K, or Retina, and understand physical versus CSS pixels.
Key features
Live Resolution Detection
Your screen resolution, viewport size, and pixel ratio are detected instantly and update in real-time as you resize the browser or rotate your device.
Physical vs. CSS Pixels
Understand the difference between CSS logical pixels (used for layout) and actual physical pixels on your Retina or HiDPI display.
Full Display Metrics
Get aspect ratio, color depth, orientation, estimated diagonal, available screen area, and a human-readable device class all in one place.
100% Private & Client-Side
Every metric is read locally in your browser using the Screen API. Your display data is never uploaded or stored on any server.
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