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Client Diagnostics

Browser Information Tool

Browser Information Tool

Inspect comprehensive details about your web browser, operating system, screen/viewport resolution, device type, language, timezone, cookies, and network connection.

Primary Environment

Desktop
Detected Browser Detecting...
Operating System Detecting...

Screen & Viewport

Screen Resolution -
Viewport Size -
Color Depth -
Device Pixel Ratio -

Locale & System Time

System Language -
Local Timezone -
Connection Status -
Local Time -

Engine & Hardware

Rendering Engine -
CPU Cores (Threads) -
Device Memory (RAM) -
GPU Renderer -

Storage & Security

Cookies Enabled -
LocalStorage Status -
SessionStorage Status -
Do Not Track (DNT) -

Full User Agent String

Detecting...

Export & Refresh

Viewport Dynamic Tracker

Resize your browser window to see the viewport size adjust in real-time. This helps developers test fluid layouts across standard responsive breakpoints (Mobile: 320px-480px, Tablet: 768px-1024px, Desktop: 1024px+).

Knowledge Hub

Deep Dive: Web Browser & Compatibility Testing

What is a User Agent?

The User Agent (UA) is a text string sent by your browser to web servers. It acts as an identifier containing your browser brand, layout engine, and client operating system details. For example, Chrome's user agent contains references to "Safari", "WebKit", and "Mozilla" for historical compatibility reasons, allowing it to load standard web content correctly.

Browser Rendering Engines

Modern browsers use rendering engines to interpret HTML, CSS, and JS:

  • Blink: Developed by Google and used in Chrome, Edge, Opera, and Brave. Based on WebKit.
  • Gecko: Developed by Mozilla and powers Firefox. Designed for extensibility and standards compliance.
  • WebKit: Developed by Apple and powers Safari. Native to macOS and iOS.

Viewport vs Screen Resolution

Screen Resolution is the hardware pixel density of your monitor (e.g. 1920x1080). The Viewport is the actual canvas area of the browser page displaying the website content, which excludes the address bar, bookmark bars, borders, and sidebar panels. In responsive web design, websites are styled to adapt to the Viewport dimensions rather than the hardware screen size.

Client Storage Types

Browsers provide different client-side data storage options:

  • Cookies: Small text files containing session identifiers, sent to the server with every HTTP request.
  • LocalStorage: Persistent key-value storage locally on the client. Survives browser restarts and has a capacity of 5-10MB.
  • SessionStorage: Temporary storage that lasts only as long as the specific browser tab is open. Clearing or closing the tab destroys this data.
FAQs

Frequently Asked Questions

A User Agent is a text header sent by your browser to websites, telling them details about your browser name, version, rendering engine, and operating system. Web servers use this string to optimize layouts and assets for specific browsers.

Screen Resolution is the total physical pixel dimensions of your monitor or screen. Viewport Size represents the actual visible area of the web page inside your browser window, excluding toolbars, scrollbars, and bookmarks panels. Viewport size changes when you resize the browser window.

No. All diagnostic data is extracted directly from the window, navigator, and screen JavaScript objects in your web browser. No details are transmitted or saved remotely, maintaining complete data confidentiality.

Many modern web applications depend on cookies for authentication and JavaScript for interactivity. Knowing if these configurations are blocked by safety extensions or privacy settings helps developers debug application failures.

You can click the "Copy Specifications" button to copy a structured text table of your configuration to your clipboard, or download it as a JSON file, which can be pasted directly into bug reports, emails, or support chat channels.

Articles

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