Screen & Browser Info Checker
Inspect your device screen resolution, active viewport size, and browser details.
Related Free Tools
About Free Screen Resolution & Browser Viewport Checker
Check your monitor screen resolution, live browser viewport width & height, device pixel ratio (DPR), and User Agent string.
How to Use
- Open the page to immediately view your Screen Resolution, Viewport Size, and Device Pixel Ratio.
- Resize your browser window to watch the Viewport Size update live.
Key Features & Benefits
- Essential for web developers and designers testing responsive breakpoints and Retina/HiDPI displays.
- Displays your full browser User Agent string for quick debugging.
Frequently Asked Questions
What is the difference between Screen Resolution and Viewport Size?
Screen Resolution is your monitor's full physical pixel dimension, while Viewport Size is the inner browser window area currently displaying the webpage.
Screen Resolution is your monitor's full physical pixel dimension, while Viewport Size is the inner browser window area currently displaying the webpage.
What is Device Pixel Ratio (DPR)?
DPR indicates how many physical screen pixels make up one CSS pixel—for example, Retina displays typically have a DPR of 2x.
DPR indicates how many physical screen pixels make up one CSS pixel—for example, Retina displays typically have a DPR of 2x.