Browser Information

Detect your browser, device, screen, network, and JavaScript capabilities instantly.

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🌐 Browser

🖥️ Display & Screen

📶 Network & Connectivity

⚙️ Hardware

🔒 Privacy & Security

🧩 Features & APIs

📋 User Agent

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Frequently Asked Questions

What is a user agent?
A user agent (UA) string is a text identifier that your browser sends to every website you visit. It typically includes the browser name and version, the rendering engine, and the operating system. Websites use it to tailor content and detect compatibility issues.
Can websites detect my screen resolution?
Yes. JavaScript can read your screen resolution (via screen.width/screen.height), viewport size (via window.innerWidth/innerHeight), and even the device pixel ratio. This information is commonly used for responsive design but can also be used for fingerprinting.
What is canvas fingerprinting?
Canvas fingerprinting works by asking your browser to draw a hidden image or text onto an HTML5 canvas element, then reading the pixel data. Because different devices, GPUs, and browsers render slightly differently, the resulting pixel data creates a nearly unique identifier — a “fingerprint” — without using cookies. This page computes a simple hash of that data to show you the concept.
How accurate is browser detection?
Browser detection based on the user agent string is notoriously unreliable. Browsers can spoof their UA string, and many browsers share the same engine (e.g., Chrome, Edge, and Opera all use Blink). The information on this page is parsed from the UA string and JavaScript APIs, and should be used as a general guide rather than a definitive identification.

How to Use the Browser Information Tool

  1. Open the tool: The browser information is displayed automatically when you load the page — no input required.
  2. Review your browser details: See your browser name and version, rendering engine, operating system, and device type.
  3. Check technical capabilities: View your screen resolution, viewport size, color depth, pixel ratio, and supported web technologies like WebGL, WebAssembly, and JavaScript features.
  4. Copy your user agent string: Copy the full user agent string for debugging, support tickets, or compatibility testing.

Understanding Browser Detection and User Agents

The user agent string is an HTTP header that your browser sends to every web server, identifying itself with details about the browser name, version, operating system, and sometimes device information. Originally designed to help servers serve compatible content, user agent strings have become notoriously complex due to historical compatibility hacks — nearly every browser includes "Mozilla" in its string for legacy reasons, and the format varies significantly between vendors.

Modern web development increasingly relies on feature detection rather than user agent parsing. Instead of guessing browser capabilities based on the user agent string, developers test whether specific JavaScript APIs or CSS features exist in the current browser. This approach is more reliable and future-proof, as it adapts automatically when browsers add or remove features. However, user agent strings remain valuable for analytics, debugging, and identifying the root cause of browser-specific issues.

Browser information tools are essential for web developers, QA testers, and IT support teams. When a user reports a bug, knowing their exact browser version, operating system, screen resolution, and device capabilities helps narrow down the cause. The tool also reveals important security information like cookie settings, JavaScript status, and supported encryption protocols, which can explain why certain websites or features behave differently across devices.

Frequently Asked Questions

Can websites track me through my browser information?
Your browser sends some information (user agent, IP address, cookies) to every website you visit. This is necessary for the web to function. However, the combination of browser settings, installed fonts, and hardware characteristics can create a "fingerprint" that may identify you across sessions.
Why does my user agent string say Mozilla?
Historical compatibility. In the early days of the web, Netscape Navigator (code-named Mozilla) was the dominant browser, and some servers only served advanced features to Mozilla-based browsers. Other browsers started including "Mozilla" in their user agent to receive the same content, and this practice continues today.
Is my browser information private?
The information shown here is visible to any website you visit — it is sent as part of every HTTP request. This is by design. If you want to limit what websites can see, use privacy-focused browsers, disable JavaScript, or use browser extensions that modify or randomize your fingerprint.

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