What Is My Screen Resolution
Resolution, pixel ratio & refresh rate
Resize the window, zoom or rotate your device and the numbers update. Everything is read from your own browser; nothing is sent anywhere.
About the What Is My Screen Resolution
See your screen resolution the moment the page opens, along with the physical pixels on high-density (Retina) screens, the size of your browser window, the aspect ratio, a measured refresh rate, colour depth and whether your display supports wide colour and HDR. Useful for choosing wallpapers, checking a new monitor, or telling a developer exactly what you see.
- Open the page: your resolution appears at the top.
- Resize the window, zoom or rotate your device to watch the numbers change.
- Press Copy all details to share them.
Frequently asked
Why is my resolution lower than my monitor's?
Browsers report screen size in CSS pixels. On high-density screens (Retina, 4K laptops, phones) and when Windows scaling is above 100%, each CSS pixel covers several physical pixels. Physical pixels = screen resolution × device pixel ratio.
How is the refresh rate measured?
By counting how many frames the browser draws in a second. It usually matches your display (60, 120, 144 Hz…), but battery saving or a busy computer can show a lower number.
What's the difference between screen and viewport?
The screen is the whole display. The viewport is the part of the browser window the page uses, which is smaller because of tabs, toolbars and the taskbar.
Is what I type sent to a server?
No. The tool runs entirely in your browser and there's no server behind it, so what you type never leaves your device and nothing is stored. You can check: it keeps working if you go offline after the page has loaded.
More from the Web & QR drawer
Other tools kept in this drawer, plus a few favourites from the bench.