Device & Browser Info Checker
This device and browser info checker shows exactly what information your browser exposes about your hardware, screen, network, and privacy settings. Understanding your digital footprint is the first step to protecting your privacy online.
How Device & Browser Info Checker Works
Discover what your browser reveals about your device. See user agent, screen resolution, GPU, CPU cores, memory, battery, network, and privacy settings. Provide your input in the form above and the tool analyzes it instantly in your browser, giving you actionable results without sending data to any server.
What Information Does Your Browser Share?
Every time you visit a website, your browser automatically shares a surprising amount of information about your device and setup. This includes your operating system, browser version, screen resolution, installed plugins, language preferences, timezone, and even hardware details like CPU cores and available memory. Websites use this information for legitimate purposes like rendering content correctly for your screen size and language, but it can also be used to create a unique profile that tracks you across the web without cookies.
Browser Information
The user agent string is one of the most commonly shared pieces of information. It tells websites your browser name, version, operating system, and sometimes device model. The platform property reveals your operating system family (Win32, MacIntel, Linux, etc.). Language settings show your preferred language and all accepted languages, which can reveal your nationality or location even without IP-based geolocation. These details are sent with every HTTP request your browser makes.
Hardware Detection
Modern browsers expose hardware information through JavaScript APIs. The hardwareConcurrency property reveals how many CPU cores your device has. The deviceMemory API shows available RAM in gigabytes. WebGL provides access to your GPU model and vendor through debug renderer info extensions. Touch point detection reveals whether you are using a touchscreen device and how many simultaneous touch points it supports. The Battery Status API (where supported) can even report your battery level and charging status.
Screen and Display Information
Your screen resolution, color depth, and device pixel ratio are all accessible to websites. The device pixel ratio is particularly telling, as it can distinguish between standard displays and high-DPI (Retina) screens. Combined with the actual viewport size, websites can often determine your specific device model. For example, an iPhone 15 Pro has a distinctive combination of screen dimensions and pixel ratio that sets it apart from other devices. This information is essential for responsive web design but also contributes to browser fingerprinting.
Network and Privacy Signals
The Network Information API exposes your connection type (4G, WiFi, etc.), estimated downlink speed, and round-trip time. Privacy-related signals include whether cookies are enabled, the Do Not Track header setting, and your timezone. Ironically, enabling Do Not Track can make you more identifiable because relatively few users enable it, making it a distinguishing signal rather than a privacy protection. The combination of all these data points creates a remarkably unique fingerprint that can identify your browser across different websites and sessions.
Why This Matters for Privacy
Browser fingerprinting is increasingly used as an alternative to cookies for tracking users online. Unlike cookies, fingerprints cannot be easily cleared or blocked. Advertisers, analytics companies, and even some websites use fingerprinting to identify returning visitors, serve targeted ads, and detect fraud. Understanding what your browser reveals is the first step toward making informed decisions about your online privacy. Tools like this help you see exactly what data you are exposing and take steps to minimize your digital footprint.
Frequently Asked Questions
Can websites see my exact device model?
Websites cannot directly query your device model, but they can often infer it from the combination of user agent string, screen dimensions, pixel ratio, and hardware capabilities. For example, specific iPhone models have unique screen resolution and pixel ratio combinations. Android devices often include the model name directly in the user agent string.
Is this information shared even in private/incognito mode?
Yes, private or incognito mode only prevents your browser from saving browsing history, cookies, and form data locally. It does not change the information your browser shares with websites. Your user agent, screen resolution, hardware details, and other fingerprinting signals remain the same in private mode.
How can I reduce the information my browser shares?
Use privacy-focused browsers like Firefox with Enhanced Tracking Protection or Brave, which randomize or limit fingerprinting signals. Browser extensions like CanvasBlocker and uBlock Origin can block specific fingerprinting techniques. The Tor Browser provides the strongest protection by making all users look identical. However, blocking signals may break some website functionality.
What is the Battery Status API and should I worry about it?
The Battery Status API allows websites to read your battery level, charging status, and estimated charge/discharge time. Research has shown it can be used for tracking because the combination of battery level and time estimates creates a short-lived but unique identifier. Firefox removed this API for privacy reasons, while Chrome still supports it.
Does device memory and CPU core count really help identify me?
On their own, hardware specs are not very identifying since many devices share the same specifications. However, combined with dozens of other signals (screen size, GPU, timezone, language, etc.), they contribute to a highly unique fingerprint. The more data points available, the more unique each combination becomes.