Device Information

What the browser actually exposes about your device — and what it deliberately hides

Open this page and you'll see your screen resolution, pixel ratio, browser name and version, operating system, CPU thread count, approximate RAM, and connection type all listed out. Most of this comes from the navigator and screen APIs — no permissions needed, no install. The GPU renderer string shows up if WebGL is available, which it usually is. What you won't see is your exact physical location, precise battery cycle count, or MAC address. Browsers block those intentionally, and rightly so. The data here is the subset that browsers consider reasonable to share for layout, performance, and compatibility decisions.

The user-agent string is shown in full so you can copy it. This is useful when you're filing a bug report and need to say exactly what environment you were on, or when you're testing a responsive layout and want to confirm the breakpoint matches what your CSS expects for your current screen. The device pixel ratio (DPR) is the one that surprises people — a "1080p" laptop might report a DPR of 2.0, meaning the browser is actually rendering at 2160px CSS pixels wide. If your layout looks oversized or undersized on high-DPI screens, DPR is usually the first thing to check.