Browser Privacy Checker
See what your browser reveals about you. 20+ fingerprinting tests, a letter grade, and actionable recommendations — all running locally in your browser.
Run 20+ privacy and fingerprinting tests to see how trackable your browser is. Nothing leaves your device.
What They Know About You
How to Improve Your Privacy
How to Use This Tool
Click Check My Privacy and wait a few seconds. The tool runs 20+ tests on your browser to detect what information websites can collect about you — from your screen resolution and installed fonts to your GPU model and audio processing stack. When the scan finishes, you receive a letter grade (A+ through F), a detailed breakdown by category, and specific recommendations to improve your privacy.
Everything runs locally in your browser. No data is sent to any server. You can verify this by opening your browser's developer tools and checking the Network tab during the scan.
What Is Browser Fingerprinting?
Browser fingerprinting is a tracking technique that identifies you without using cookies. Every time you visit a website, your browser shares dozens of data points: your operating system, screen size, timezone, language, installed plugins, GPU capabilities, and more. Individually, each data point is innocuous. Combined, they form a fingerprint that is often unique enough to identify your browser across different websites.
Unlike cookies, fingerprints cannot be deleted or blocked through browser settings alone. They are generated from information your browser must share to render web pages correctly. This makes fingerprinting one of the most persistent and difficult-to-prevent forms of online tracking.
Why Browser Privacy Matters
Websites, advertisers, and data brokers use browser fingerprinting to track you across the web, build behavioral profiles, and serve targeted advertising — all without your explicit consent. Studies have shown that fingerprinting can identify individual browsers with over 90% accuracy, even in private or incognito mode.
Understanding what your browser reveals is the first step toward controlling your digital footprint. You cannot protect what you do not understand. This tool makes the invisible visible by showing you exactly what data your browser exposes and how unique it makes you.
How We Calculate Your Score
The tool evaluates your browser across six weighted categories:
- Browser Identity (15%) — User agent string, languages, platform, Do Not Track, and Global Privacy Control signals.
- Hardware Exposure (10%) — CPU cores, device memory, screen resolution, touch capabilities, and device pixel ratio.
- Canvas & Rendering (20%) — Canvas 2D fingerprint, WebGL GPU information, and audio processing fingerprint.
- Tracking Protection (20%) — Cookie settings, ad blocker detection, Do Not Track, Global Privacy Control, and storage API availability.
- Network Privacy (15%) — WebRTC IP leak detection and network connection information.
- Data Surface (20%) — Installed fonts, speech synthesis voices, media devices, permissions, codec support, and plugin information.
Each category is scored from 0 (fully exposed) to 100 (well protected). The overall grade is the weighted average of all six categories, mapped to a letter grade from A+ (90+) to F (below 30).
Tips to Improve Your Privacy
- Use a privacy-focused browser. Firefox, Brave, and Tor Browser include built-in fingerprinting protection that randomizes or blocks many of the data points this tool checks.
- Enable tracking protection. Most modern browsers have a tracking protection or enhanced privacy mode. Turn it on. In Firefox, set it to "Strict" for maximum protection.
- Install a content blocker. Extensions like uBlock Origin block tracking scripts before they can collect your fingerprint. They also block ads and improve page load times.
- Disable WebRTC leak protection. If you do not use browser-based video calls, disable WebRTC to prevent your local IP address from being exposed to websites.
- Use a VPN. A VPN hides your real IP address and can mask some network-level fingerprinting signals.
Frequently Asked Questions
What is browser fingerprinting?
Browser fingerprinting is a tracking technique that identifies you by collecting information your browser shares with every website — screen resolution, installed fonts, GPU model, audio processing, and dozens of other signals. Combined, these data points create a unique profile that can track you without cookies.
Does this tool send my data to a server?
No. Every test runs entirely in your browser using JavaScript APIs. No fingerprint data, test results, or personal information is transmitted to any server. You can verify this by checking the Network tab in your browser's developer tools.
How is the privacy score calculated?
The tool runs 20+ individual checks across six categories: Browser Identity, Hardware Exposure, Canvas and Rendering, Tracking Protection, Network Privacy, and Data Surface. Each category receives a score from 0 to 100 based on how much identifying information is exposed. The overall grade is a weighted average of all categories.
How can I improve my browser privacy score?
Use a privacy-focused browser like Firefox or Brave, enable tracking protection, install a content blocker like uBlock Origin, disable WebRTC if you do not need it, and use a VPN to mask your IP address. The tool provides specific recommendations based on your results.
Privacy
Everything runs in your browser. No fingerprint data, scores, or personal information is sent to any server. No cookies, no accounts, no tracking. The shareable result image is generated locally using the Canvas API.
Want to learn more about browser fingerprinting and how to protect yourself? Read our guide: What Your Browser Reveals About You: A Guide to Digital Fingerprinting. Curious about how we built this tool? Read the dev log: Building a Browser Privacy Checker That Shows What Trackers See.