WEBSITE UTILITY TOOL

Screen Resolution Checker

Show your screen, viewport and device-pixel-ratio information.

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How to use Screen Resolution Checker Online — Free Tool

  1. Open the tool on the device or display you want to measure.
  2. Read the screen size, viewport size and device-pixel-ratio values shown.
  3. Resize the browser window or rotate your phone to see how viewport values change.

Screen Resolution Checker Online — Free Tool FAQ

What is the difference between screen size and viewport size?

Screen size describes the browser-reported display area, while viewport size is the page area currently available inside the browser.

Why is device pixel ratio not always 1?

High-density displays can use multiple physical pixels for one CSS pixel.

Can zoom or browser UI affect the result?

Yes. Zoom, browser chrome, orientation and device settings can affect viewport-related values.