Screen Resolution Online
Use this free online Screen Resolution tool to read device hardware pixel density and viewport bounds dynamically.
Monitor Resolution
$0 x $0 px
Active CSS Viewport
$0 x $0 px
Device Pixel Ratio
$1x (DPI scaling)
Color Bit Depth
$24 bits per pixel
How it works & FAQ
Why this is secure?
Screen and display information is read from your browser's screen and window APIs. No data is transmitted to any server.
Step-by-Step Guide
- 1Open the page — your screen information is displayed automatically.
- 2View your display resolution, viewport size, device pixel ratio, color depth, and orientation.
- 3Resize your browser window to see viewport dimensions update in real time.
Frequently Asked Questions (FAQ)
What's the difference between screen resolution and viewport size?
Screen resolution is your monitor's total pixel count (e.g. 1920×1080). Viewport size is the area available to the webpage inside the browser window, excluding toolbars.
What is device pixel ratio?
Device pixel ratio (DPR) is how many physical pixels correspond to one CSS pixel. A DPR of 2 (Retina displays) means 4 physical pixels per CSS pixel, giving sharper rendering.
Why does my resolution show as lower than expected?
High-DPI displays report a logical resolution in CSS pixels, which is lower than the physical pixel count. Your actual display has (resolution × DPR) physical pixels.
All screen data is read locally by your browser. No display information is transmitted.