Browser & Device Information — Free
Runs 100% in your browser — your files never leave your device.
Responsive bugs and support reports often depend on details the user does not know how to find. This page reads the browser’s standard device APIs and presents screen dimensions, orientation, pixel ratio, viewport size, languages, platform, CPU count, connection state, and User-Agent without collecting or uploading them.
How it works
- 1
Open the tool in the target browser
- 2
Review screen and device values
- 3
Resize the window to update viewport data
About this tool
What the tool reads
The tool displays what your browser reports about itself: screen resolution and pixel ratio, viewport, browser and engine version, platform, language, timezone, and feature support. Everything comes from standard browser APIs, read locally in your session.
The debugging cases
Responsive layout issues need the real viewport and pixel ratio, not the CSS pixels you assume. Support tickets need the actual browser and platform the user runs. Feature-gating needs to know which APIs the environment actually exposes — the page answers all three without asking the user anything.
Privacy by architecture
Everything shown is read from your own browser, in your own session, and sent nowhere — there is no backend to receive it. It is also a useful demonstration of exactly what any website can see without asking permission.
Frequently asked questions
Why does the screen resolution differ from my monitor?
The browser reports CSS pixels and a device pixel ratio, not raw hardware pixels — a 2× display shows half the CSS resolution. Multiply the two for hardware truth.
Can this identify me?
The values shown are the standard fingerprinting surface every site receives — this page simply displays them transparently. It shows what the web already knows, not something new.
Why does my user agent string look odd?
Browsers froze and aliased UA strings for compatibility. The user-agent parser extracts what the string actually claims.