Browser Info

What is browser information detection?

Your web browser sends a wealth of information to every website you visit. This tool reveals exactly what data your browser exposes — including your user agent string, screen resolution, installed plugins, language preferences, cookie settings, and JavaScript capabilities. Understanding this information helps developers build compatible websites and helps privacy-conscious users understand their digital fingerprint.

Every HTTP request includes headers that identify your browser type, version, and operating system. Beyond the basic user agent string, modern browsers expose detailed capabilities through JavaScript APIs — canvas fingerprinting, WebGL renderer information, available fonts, and hardware concurrency (number of CPU cores). Together, these data points can create a nearly unique identifier even without cookies.

What this tool detects

• User agent string — identifies your browser name, version, and operating system.
• Screen resolution, color depth, and device pixel ratio (retina detection).
• Supported features — cookies, JavaScript, WebGL, WebRTC, Service Workers.
• Language and timezone settings configured in your browser.
• Connection type and approximate network speed (if available via Network Information API).

How to use this tool

Simply open this page and all detected information is displayed automatically. No input is required. The tool runs entirely in your browser — no data is sent to any server. You can use this to troubleshoot website compatibility issues, verify your privacy settings, or check what information you are exposing to websites you visit.

Browser fingerprinting explained

Browser fingerprinting combines multiple data points (screen size, fonts, plugins, timezone, language) to create a unique identifier. Research by the Electronic Frontier Foundation found that 83.6% of browsers had a unique fingerprint. Unlike cookies, fingerprints cannot be easily deleted. Privacy-focused browsers like Tor Browser and Brave actively work to reduce fingerprinting by standardizing or randomizing these values.

Frequently asked questions

Is my browser information private?

Most browser information is sent automatically with every web request and is not private. Websites can read your user agent, screen size, language, and many other details without asking permission. You can reduce exposure by using privacy-focused browsers, disabling JavaScript for untrusted sites, or using browser extensions that spoof or block fingerprinting attempts.

Why do websites need to know my browser information?

Developers use browser information to serve compatible content — different CSS for different screen sizes, fallback code for browsers that lack certain features, and appropriate video codecs. Analytics tools use it to understand their audience. Unfortunately, the same data is also used for tracking and targeted advertising without user consent.