Screen Resolution Tester
Your screen and viewport specs live
Your viewport inside your screen
Screen resolution
0 × 0
Aspect ratio 0:0
Viewport size
0 × 0
Updates live as you resize
Device pixel ratio
1
0 × 0 physical px
Color depth
0-bit
Pixel depth 0-bit
Orientation
unknown
Available screen
0 × 0
Excluding OS taskbars
Screen resolution is your display's full size; viewport is the area this page can actually use. Device pixel ratio tells you how many physical pixels make up one CSS pixel (retina displays use 2 or more). Everything runs locally in your browser.
About this tool
Designing responsively starts with knowing your numbers. See screen resolution, live viewport dimensions, pixel ratio, color depth and orientation in one glance.
Resize the window and watch the viewport update in real time. Essential for developers and designers.
How to use the screen resolution tester
- 1Open the tool.
- 2See your screen and viewport specs instantly.
- 3Resize the window to watch viewport update live.
Frequently asked questions
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