๐Ÿ”’ 100% On-Device ยท Privacy-First

CookieGuard AI

AI-powered browser protection that reveals login risks and tracking companies, helping users safeguard their digital identity and privacy.

94B
Cookies leaked on dark web (2025)
74%
Increase from 2024
1.2B
Session IDs exposed
100%
On-device analysis

What CookieGuard Does

An AI-powered browser extension that helps users understand hidden security and privacy risks associated with web cookies.

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Identifies Authentication Cookies

An on-device machine learning model analyzes cookie features to identify cookies likely associated with authentication and estimate whether a login session may be exposed to hijacking.

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Evaluates Security Configuration

CookieGuard extracts key cookie attributesโ€”including domain scope, persistence, and security flagsโ€”and converts them into structured features for analysis.

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Detects Tracking Companies

Detects third-party tracking cookies and identifies the external companies responsible for cross-site data collection across multiple websites.

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Privacy-First Design

All analysis is performed locally inside the browser, so no cookie data or personal information leaves the user's device.

How Identity Theft Happens

If authentication cookies are stolen or misconfigured, attackers can hijack active sessions and access accounts without needing a password.

๐Ÿ”“ Token Exposure Risk

If HttpOnly is missing, malicious JavaScript can read authentication cookies through XSS vulnerabilities.

  • XSS lets attackers steal session tokens
  • Attacker impersonates you instantly
  • No password required for access

๐ŸŒ Cross-Site Execution Risk

Weak SameSite protections allow attacker-controlled sites to trigger authenticated requests under your name.

  • Browser auto-attaches cookies
  • CSRF executes actions as you
  • Can transfer money, change settings

๐ŸŽฏ Domain Scope Risk

Cookies scoped to parent domains are shared across all subdomains. One compromised subdomain exposes all.

  • Overly broad scope exposes tokens
  • Subdomain takeover = full access
  • Identity cookies leak across services

How It Works

Privacy-preserving AI pipeline that runs entirely on your device

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Input

Cookie metadata. No values stored.

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Extract

Domain, scope, persistence, flags.

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Classify

ML identifies auth cookies.

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Analyze

Evaluate hijacking risk.

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Report

Clear risk summary.

Web Cookie Security Report

We analyzed 3,000 popular websites to measure real-world cookie security practices

Key Findings

Analysis of 150,000+ cookies across 3,000 websites

3,000
Sites Analyzed
150K+
Cookies Collected
97%
Sites with Trackers
67%
High-Risk Auth Cookies

Get CookieGuard AI

Free, open-source, and privacy-first browser extension.

Download from GitHub
โœ“ Open Source โœ“ MIT License โœ“ Chrome Extension