Tool StudioYour screen resolution, viewport, and DPI, live
See your display's full resolution, available screen space, browser viewport size, device pixel ratio, and an estimated DPI — updates live as you resize the window or rotate your device.
Load the page
Every value shows automatically, no action needed.
Resize or rotate
Watch the numbers update live.
Read the breakdown
Resolution, viewport, pixel ratio, and DPI, all at once.
Is the DPI value exact?
It's an estimate based on your device pixel ratio (96 × ratio) — true DPI also depends on your screen's physical size, which JavaScript has no way to read.
Why is my viewport smaller than my screen resolution?
Screen resolution is your full display; viewport is just the visible browser content area, minus browser chrome, taskbars, and any other windows.
Measure your browser's live frames-per-second and get an estimate of your monitor's refresh rate. Free, works entirely in your browser.