Web Tools

Browser Information Checker

See what your browser reveals about itself and your device — language, timezone, screen, platform, and more. All read locally; nothing is uploaded.

No data uploadedRead instantly

Snapshot: 6/21/2026, 9:02:18 PM

Browser

User Agent

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/149.0.0.0 Safari/537.36

Browser (approx.)Chrome 149.0.0.0

Engine (approx.)Blink

System

OS (approx.)macOS 10.15.7

PlatformMacIntel

CPU Cores8

Device Memory16 GB

Device Pixel Ratio1

Color Depth24-bit

Touch SupportNo

Language & Time

Languageen-US

All Languagesen-US

Time ZoneAsia/Seoul

Local Time6/21/2026, 9:02:18 PM

Screen & Viewport

Screen800 × 600 px

Available Screen800 × 600 px

Viewport800 × 600 px

Network & Privacy

OnlineYes

Cookies EnabledYes

Do Not TrackNot set / unspecified

What this tool shows

Your browser exposes a range of information via browser APIs: the user-agent string, language preferences, screen dimensions, timezone, and more. This tool reads those values locally and displays them in one place. Browser and OS names are labelled "approximate" because user-agent strings can be spoofed, reduced (via UA-CH), or misidentified.

Field glossary

User AgentThe full string your browser sends to identify itself. Can be spoofed or reduced by privacy settings.

PlatformThe OS platform string from navigator.platform — deprecated but still widely exposed.

Device Pixel RatioThe ratio of CSS pixels to physical pixels. Values above 1 indicate HiDPI / Retina displays.

Hardware ConcurrencyNumber of logical CPU cores. Exposed by navigator.hardwareConcurrency.

Device MemoryApproximate RAM in GB. Exposed by navigator.deviceMemory — only available in Chromium browsers.

ViewportThe visible page area inside the browser window (window.innerWidth × window.innerHeight).

Do Not TrackA deprecated browser privacy signal. Most sites and analytics providers do not honour it.

Privacy — reads locally, uploads nothing

This tool reads information your browser exposes locally via standard JavaScript APIs. Nothing is uploaded. No signup required. No server is contacted.

Frequently Asked Questions

Why are browser and OS labelled "approximate"?

Browsers can include misleading text in user-agent strings for compatibility reasons. For example, every Chromium-based browser includes "Safari" in its UA. Detection is a best guess, not a guaranteed fact. Modern browsers also support User-Agent Client Hints (UA-CH) which reduces the detail exposed.

Why is Device Memory blank?

navigator.deviceMemory is only exposed in Chromium-based browsers (Chrome, Edge, Opera). Firefox and Safari do not report it.

Why does the browser show a different screen size than my monitor?

The browser reports screen size in CSS pixels, not physical pixels. On HiDPI or Retina displays the device pixel ratio is above 1, so the CSS pixel count is lower than the physical pixel count. Multiply screen width/height by the device pixel ratio to get the physical pixel count.

What does the Viewport size mean?

The viewport is the usable area inside the browser window after the address bar and toolbars. It reflects window.innerWidth and window.innerHeight. Use the Refresh button to update if you resize the window.