LeakLens door POLPROG

LeakLens is a comprehensive privacy inspector that reveals what data you share with every website you visit — and gives you granular control over each piece.

Trackers follow you across the web. Fingerprinting scripts silently identify your browser. Cookies persist long after you leave a site. Security headers go unchecked. LeakLens makes all of this visible — with real-time analysis, actionable scores, and one-click protection tools that work entirely in your browser.

✅ One purpose: help you understand and control the data you share with websites
🧩 Deep analysis: trackers, cookies, fingerprinting, security headers, permissions — all in one view
🔒 Privacy-first: no data collection, no analytics, no external connections



Key Features (at a glance)

• 🔍 Real-Time Privacy Audit — instant security posture score (0–100) and risk grade (A–F) for every website
• 🛡️ Tracker Blocking — block trackers with explainable rules in Balanced, Strict, or Custom modes
• 🧹 URL & Redirect Cleaner — automatically strip tracking parameters (UTM, gclid, fbclid, and more)
• 🔐 Fingerprint Detection — detect Canvas, WebGL, Audio, and WebRTC fingerprinting in real-time
• 🌐 WebRTC & Network Leak Shield — prevent IP leaks and block requests to private IP ranges
• ⏱️ Temporary Permission Grants — allow geolocation, camera, or mic temporarily with auto-revoke
• 🔒 Session Shield — per-tab session isolation with cookie management
• 📊 Security Headers Analyzer — analyze HSTS, CSP, Permissions-Policy, and more with actionable recommendations
• 📋 Context Menu — quick actions: inspect, shield, block trackers, clear data, open in isolation
• 📌 Pin & Drag Overlay — float LeakLens on any page, drag it anywhere
• ⚙️ Advanced Settings — per-domain rules, editable tracker lists, import/export configuration
• 🌍 21 Languages — full internationalization

What LeakLens Helps You Do

🔍 Understand Your Privacy Exposure

See exactly what's happening on every website you visit.

• Instant privacy score (0–100) based on trackers, cookies, fingerprinting, and headers
• Risk grade (A–F) at a glance in the toolbar badge
• Timeline of all privacy-relevant events per domain
• Per-domain breakdown of active trackers, cookies, and fingerprint signals

🛡️ Block Trackers with Transparency

Stop tracking scripts — and understand exactly which ones and why.

• Three protection modes: Balanced, Strict, or Custom
• Explainable blocking — see which rule matched and why each tracker was blocked
• Domain-level blocking controls for fine-grained management
• Bundled tracker lists — no external connections needed

🔐 Detect & Mitigate Fingerprinting

Know when websites try to fingerprint your browser — and fight back.

• Detects Canvas, WebGL, Audio, and WebRTC fingerprinting in real-time
• Three modes: Detect (monitor), Prompt (ask), or Mitigate (defend)
• Per-signal counters with "last seen" timestamps
• Content script injection monitors fingerprint API calls

🧹 Clean Tracking Parameters Automatically

Remove the invisible tracking data hidden in URLs.

• Automatically strips UTM, gclid, fbclid, and 20+ tracking parameters
• Editable parameter list — add or remove tracked parameters
• Works silently in the background on every navigation

🌐 Prevent Network Leaks

Stop your real IP and local network from being exposed.

• Controls WebRTC IP handling policy to prevent IP leaks
• Local Network Request Guard detects and blocks requests to private IP ranges
• TLS & Certificate Inspector shows TLS version, cipher suite, issuer, validity (Firefox)

⏱️ Control Permissions Temporarily

Grant sensitive permissions only for as long as you need them.

• Grant geolocation, camera, microphone, or notifications temporarily
• Options: Allow once, 10 minutes, 1 hour, or Always
• Permissions auto-revoke after the timer expires — no manual cleanup needed

📊 Audit Security Headers

Understand how well each website protects its visitors.

• Analyzes HSTS, CSP, Permissions-Policy, X-Frame-Options, and more
• Calculates a Security Posture Score (0–100)
• Shows per-header status with actionable recommendations

Designed for Clarity (Not Feature Bloat)

LeakLens packs serious privacy analysis into a clean, focused interface.

• ✨ Elegant popup with tabbed navigation and real-time scores
• ⚡ Lightweight — minimal performance impact
• 🧠 Explainable results — every blocked tracker, every risk flag has a reason
• 📌 Draggable, pinnable overlay — stays on screen while you browse
• 🔁 Works across SPA navigation without needing reloads
• 🌍 Available in 21 languages

Privacy & Data

LeakLens does not:

• collect personal data
• track your browsing behavior
• run analytics or profiling
• contact any external servers

It works entirely locally in your browser. All domain rules, event logs, and settings are stored in chrome.storage.local and never leave your device.