Device information
Display information about your device and browser
TL;DR
What is Device information?
Device information exposes properties that the browser makes available about the current device and environment: screen resolution, viewport size, pixel ratio, operating system, browser version, online status, and available hardware. This data comes from browser APIs such as navigator, screen, and window.
Common use cases
- ‣Responsive design testing: check the reported viewport dimensions and pixel ratio to debug layout issues on your device
- ‣Bug reporting: include device and browser details when filing issues to help developers reproduce the problem
- ‣User agent inspection: read the raw user agent string to understand how a server or analytics tool will categorize your browser
Frequently asked questions
Can websites always detect my real device?
Browsers expose this information by default, but it can be spoofed. Developer tools allow you to override the user agent string and viewport. Browser extensions can also modify reported values. Some browsers limit fingerprinting by reducing the precision of certain values.
What is the pixel ratio?
The device pixel ratio (DPR) is the ratio of physical screen pixels to CSS pixels. A DPR of 2 means the screen has 4 physical pixels for every 1 CSS pixel. High-DPR displays (Retina, HiDPI) require 2x or 3x images to appear sharp.