// My System Information on the Internet A numerical label assigned to your device by your internet provider that identifies it on the network.
Learn more about your IP → The UTC offset and regional timezone your device is currently set to (e.g. America/New_York, UTC−5).
Estimated latitude and longitude for your connection, derived from the same IP lookup as the city and region above.
A rough geographic estimate of where you are, derived by looking up your IP address in a regional database.
Whether your device is classified as a desktop, tablet, or mobile phone, based on your browser's user agent string.
The underlying software running your device — Windows, macOS, Android, iOS, Linux, etc.
Learn more about your OS → The number of logical processor cores available in your device, as reported by the browser.
A number describing how many physical pixels make up one "logical" pixel — typically 2 on Retina/high-DPI displays.
The number of pixels wide and tall that make up your screen (e.g. 1920×1080).
Learn more about your screen → The size of your actual visible browser window — different from your full screen resolution if your browser isn't maximized.
The name and version number of the web browser you're using (e.g. Chrome 125, Firefox 126, Safari 17).
Learn more about your browser → The preferred language (or ranked list of languages) configured in your browser or operating system.
A flag indicating whether your browser is configured to store small text files that websites can write and read back later.
An optional signal your browser can send asking websites not to track your behavior — most browsers no longer enable this by default.
// learn more about what gets shared
Frequently asked questions #
Why can websites see this data — and what do they actually do with it?
What is my IP address?
Your IP address is a numerical label assigned to your device by your internet provider that identifies it on the network. Every request your browser makes must include your IP address so the server knows where to send the response — it's a fundamental part of how the internet works. Websites use it for fraud detection, rate limiting, and regional content delivery.
Can a website tell what city I'm in?
Websites can make a rough geographic estimate of your location by looking up your IP address in a regional database — no GPS or permission required. Internet providers are assigned blocks of IP addresses for specific regions, so a site can cross-reference your IP to guess your city or country. This powers features like showing local currency, nearby stores, or language defaults.
Why does this show coordinates as well as a city name?
Both come from the same IP-based estimate and have the same accuracy — typically resolving to your internet provider's regional hub, not your exact address. Coordinates are shown separately because they're useful for a specific case: checking whether a VPN or proxy is successfully changing your apparent location. If you're connected to a VPN and these coordinates still match your real area, the VPN may not be masking your location correctly.
Can websites see what browser I'm using?
Yes. Browsers automatically send their name and version in something called the User-Agent header with every page request. Developers use this to test compatibility, serve the right code for older browsers, and understand which platforms their audience uses.
Do websites know if I'm using Windows or Mac?
Yes. Your operating system — Windows, macOS, Android, iOS, Linux, etc. — is included in the same User-Agent string as your browser, sent automatically with every request. Developers use it to ensure their site looks and works correctly across different platforms, and analytics tools use it to track broad device trends.
Can websites tell what type of device I'm using?
Yes. Your browser's user agent string includes signals that let websites infer whether you're on a desktop, tablet, or mobile phone. Web developers use this to serve device-appropriate layouts and features — for example, serving a touch-optimized interface to mobile visitors, or disabling certain animations on lower-powered devices.
Can websites see how many CPU cores my device has?
Yes. Browsers expose the number of logical processor cores through the navigator.hardwareConcurrency property, readable by any JavaScript on the page. This is used by performance-sensitive applications to decide how many parallel tasks to run — video editors, games, and data-processing tools use it to match workload to available processing power.
How do websites know what language to show me?
Your browser sends your preferred language (or a ranked list of languages) in an Accept-Language header with every request, and JavaScript can also read this setting directly. Sites use it to automatically serve content in your language without requiring you to choose from a dropdown.
What happens if I disable cookies in my browser?
Cookies are small text files that websites write to your browser and read back later. When cookies are disabled, a site can detect this by attempting to set one and immediately checking whether it was saved. Features that depend on cookies — login persistence, shopping carts, saved preferences — will not work when cookies are turned off.
What does Do Not Track actually do?
When enabled, your browser sends a signal asking websites not to track your behavior. It's voluntary — there's no technical enforcement, so individual sites decide whether to honor it. Most browsers have stopped enabling this by default, which is why many visitors will see "not set" here.
Can websites see my screen resolution?
Yes. JavaScript running on a page can read your screen dimensions directly from the browser at any time. Web designers use this to serve appropriately sized images and layouts, and analytics teams track it to understand what screen sizes their visitors commonly use.
What's the difference between viewport size and screen resolution?
Screen resolution is your monitor's total pixel dimensions. Viewport size is the actual visible area of your browser window, which is often smaller if the window isn't maximized or if you have browser toolbars, sidebars, or split-screen apps open. Websites use viewport size — not screen resolution — to decide how to lay out content for you.
What is device pixel ratio and why does it matter?
Device pixel ratio describes how many physical pixels make up one "logical" pixel on your screen. A ratio of 2 — common on Retina displays and modern smartphones — means the screen is high-DPI. Browsers expose this value so websites can serve sharper images on high-resolution screens without sending unnecessarily large files to standard displays.
Can websites detect my timezone automatically?
Yes. JavaScript can read the timezone directly from your system clock settings without any permission prompt. Websites use this to display times correctly in your local time — scheduling tools, calendars, and news sites all rely on it so you see "9:00 AM" in your timezone rather than the server's.
Every value above is data your browser sends to any website you visit — nothing here required special permission. Want more control over what you share? Try a privacy-first search engine →