Browser Privacy
This privacy testing application performs six critical tests to evaluate your browser’s protection against common tracking and fingerprinting techniques. Each test uses real browser APIs and methods that websites commonly employ to collect user data, helping you understand your actual privacy exposure.
The tests run entirely in your browser without sending any data to external servers, ensuring your privacy while testing your privacy protection.
Privacy Tests
Test your browser's privacy and security features to identify potential tracking vulnerabilities
Test Progress
Ready to startThird-Party Cookies
Tests if your browser blocks tracking cookies from third-party domains
Canvas Fingerprinting
Checks if canvas-based browser fingerprinting is blocked
WebRTC IP Leak
Tests for WebRTC local IP address leakage vulnerabilities
Do Not Track
Checks if the Do Not Track header is properly configured
Referrer Policy
Tests referrer header privacy protection settings
User Agent Privacy
Analyzes user agent string for potential fingerprinting risks
Local Storage Tracking
Tests if local storage can be used for cross-site tracking
WebGL Fingerprinting
Checks for WebGL-based hardware fingerprinting vulnerabilities
Timezone Privacy
Tests if timezone information reveals location details
Screen Fingerprinting
Analyzes screen resolution and display properties for tracking
Font Detection
Tests if installed fonts can be detected for fingerprinting
Battery Status API
Checks if battery information can be accessed for tracking
🔍 How This Privacy Testing App Works
Understanding the technical methods behind each privacy test and what they reveal about your browser's security posture.
🎯 Overview
This privacy testing application performs six critical tests to evaluate your browser's protection against common tracking and fingerprinting techniques. Each test uses real browser APIs and methods that websites commonly employ to collect user data, helping you understand your actual privacy exposure.
The tests run entirely in your browser without sending any data to external servers, ensuring your privacy while testing your privacy protection.
🧪 Individual Test Methods
1 Third-Party Cookies Test
What it tests: Whether your browser blocks tracking cookies from third-party domains.
How it works: The test attempts to set a cookie with SameSite=None and Secure attributes, which are commonly used by cross-site trackers. It then checks if the cookie was successfully set and readable.
Why it matters: Third-party cookies are the primary mechanism for cross-site tracking. Blocking them significantly improves privacy by preventing advertisers from building profiles across multiple websites.
Protection methods: Modern browsers like Safari and Firefox block third-party cookies by default. Chrome is phasing them out gradually.
2 Canvas Fingerprinting Test
What it tests: Whether your browser prevents canvas-based fingerprinting techniques.
How it works: Creates an HTML5 canvas element and draws text and shapes with specific fonts, colors, and effects. The rendered image is then converted to a data URL. Different systems render slightly different results, creating a unique "fingerprint."
Technical details: The test draws text like "Privacy Test 🔒" with specific styling, then checks if the resulting image data is blocked, randomized, or returns a generic result.
Why it matters: Canvas fingerprinting can identify users even without cookies by exploiting tiny differences in how graphics are rendered across different devices and configurations.
Protection methods: Privacy-focused browsers may block canvas access, return blank canvases, or add noise to the rendered output.
3 WebRTC IP Leak Test
What it tests: Whether WebRTC (Web Real-Time Communication) exposes your local IP address.
How it works: Creates an RTCPeerConnection with a STUN server (stun.l.google.com:19302) and monitors ICE candidates for local IP addresses. The test looks for private IP ranges like 192.168.x.x, 10.x.x.x, and 172.x.x.x.
Technical process: Establishes a peer connection, creates a data channel, generates an offer, and listens for ICE candidates that may contain local network information.
Why it matters: Even when using a VPN, WebRTC can leak your real local IP address, potentially revealing your location and network configuration to websites.
Protection methods: Browsers can disable WebRTC entirely, limit it to public interfaces only, or require user permission for access.
4 Do Not Track Test
What it tests: Whether the Do Not Track (DNT) header is enabled in your browser.
How it works: Checks the navigator.doNotTrack property, which reflects the DNT header value sent with HTTP requests.
Header values: The test looks for values of "1" (tracking disabled) or "yes" (older specification) versus "0" (tracking allowed) or undefined.
Why it matters: While not legally binding, DNT signals your privacy preference to websites. Some privacy-respecting sites honor this header.
Limitations: Many websites ignore DNT headers, and the standard has limited adoption. It's more of a privacy signal than a protection mechanism.
5 Referrer Policy Test
What it tests: How much referrer information your browser shares when navigating between sites.
How it works: Examines the document.referrerPolicy value to determine what referrer information is sent in HTTP headers.
Policy types: Checks for strict policies like "no-referrer" (sends no referrer), "same-origin" (only to same domain), or "strict-origin" (only origin, not full URL).
Why it matters: Referrer headers can leak sensitive information about your browsing patterns, including search terms and private page URLs.
Privacy implications: Loose referrer policies allow websites to track where visitors came from, potentially revealing personal information.
6 User Agent Privacy Test
What it tests: How much identifying information your browser reveals through its User Agent string.
How it works: Analyzes navigator.userAgent for detailed version numbers, operating system information, and other potentially identifying details.
Analysis criteria: Looks for specific browser versions, detailed OS information, and overall string length to assess fingerprinting risk.
Why it matters: Detailed User Agent strings contribute to browser fingerprinting by revealing your exact browser version, operating system, and sometimes hardware details.
Modern trends: Browsers are moving toward "User Agent reduction" to provide less detailed information and improve privacy.
📊 Scoring System
Privacy Score Calculation: Your privacy score is calculated as the percentage of tests that show protection: (Protected Tests ÷ Total Tests) × 100
⚙️ Technical Implementation
Client-Side Testing: All tests run entirely in your browser using standard web APIs. No data is transmitted to external servers during testing.
Asynchronous Execution: Tests run sequentially with realistic delays to simulate actual website behavior and provide clear visual feedback.
Error Handling: Each test includes comprehensive error handling. If a test fails due to browser restrictions, it's typically counted as "protected."
Real-World Accuracy: The tests use the same techniques that actual tracking scripts employ, providing realistic assessments of your privacy exposure.
⚠️ Limitations & Considerations
- Snapshot in Time: These tests reflect your current browser configuration. Settings, extensions, or updates may change results.
- Extension Dependencies: Privacy extensions may affect test results. Some tests might show "protected" due to extension blocking rather than browser settings.
- Evolving Landscape: Tracking techniques constantly evolve. New fingerprinting methods may not be covered by these tests.
- Context Matters: A lower score doesn't necessarily mean poor security if you use other privacy tools like VPNs or specialized browsers.
- False Positives: Some legitimate browser features might be flagged as privacy risks depending on your threat model.
🛡️ Improving Your Privacy Score
Browser Settings
- • Enable strict tracking protection
- • Block third-party cookies
- • Disable WebRTC or limit to public interfaces
- • Enable Do Not Track header
- • Use strict referrer policies
Additional Tools
- • Install uBlock Origin or Privacy Badger
- • Consider privacy-focused browsers (Firefox, Brave)
- • Use VPN services for IP protection
- • Regular browser updates and security patches
- • Review and adjust privacy settings periodically