Screen Resolution Checker
Check your screen resolution, pixel ratio, and browser viewport size.
Quick answer: enter your details below and click Check Resolution — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Converters & Utilities
Enter your details below.
How to use
- Open the tool in the browser and window size you want to measure.
- Press Check Resolution.
- Compare the screen size with the viewport size to see how much space the page really has.
About this tool
Screen Resolution Checker reads your display and browser window sizes so you can tell whether a design, screenshot, or video will fit properly. It reports the full screen resolution, the device pixel ratio for sharpness on high-density displays, and the current viewport size inside the browser. That split matters because a window that is not maximised has a smaller viewport than the screen itself.
Frequently asked questions
What is device pixel ratio?
It is how many physical pixels make up one CSS pixel. A ratio of 2 means a sharper, high-density display.
Why is the viewport smaller than the screen?
Browser chrome, sidebars, and a non-maximised window all shrink the area a page can use.