What is Device & Browser Information Checker Online?
Understanding device display characteristics is essential for responsive UI debugging and QA. This tool reports physical screen dimensions, CSS viewport dimensions, device pixel ratio (Retina detection), touch support, colour depth, and browser feature support.
How to Use Device & Browser Information Checker Online
- Open this page on any device to see detected properties.
- Resize the browser to see viewport dimensions update live.
Frequently Asked Questions
What is device pixel ratio (DPR)?
DPR is physical pixels / CSS pixels. A Retina display has DPR 2 — one CSS pixel = 4 physical pixels. High-DPR screens need @2x images for sharpness.