IDN Homograph Attack Detection
Identifies look-alike Unicode characters from Cyrillic, Greek, and other scripts that mimic Latin letters. Stops attackers using punycode domains like "xn--pypal-4ve.com" to impersonate trusted brands.
Free & Open Source Chrome Extension
Stop Phishing &
IDN Homograph Attacks
GlyphSentinel is a free Chrome security extension that detects IDN homograph attacks, typosquatting, domain spoofing, and sophisticated phishing attempts in real-time. Privacy-first protection with zero data collection.
pаypal.com⚠️ Homograph Attack Detected
Phishing Attack Blocked
This domain uses Cyrillic characters to impersonate "paypal.com" - a classic IDN homograph attack.
Go Back to Safety
Proceed Anyway
- 100% Privacy-First — No Data Collection
- Real-Time Threat Detection
- Open Source & Free Forever
Complete Phishing Protection Features
Six layers of advanced domain security working together to protect you from phishing attacks, IDN homograph scams, typosquatting, and malicious URLs.
Typosquatting & URL Hijacking Protection
Catches misspelled domains like "gooogle.com", "amaz0n.com", or "paypa1.com" using advanced Levenshtein distance analysis against 500+ known brands and financial institutions.
Subdomain Spoofing Analysis
Flags suspicious URL patterns like "paypal.secure-login.malicious.com" or "amazon.account-verify.phishing.tk" that use trusted names as subdomains to deceive users.
High-Risk TLD & Domain Age Warnings
Alerts you about domains using frequently-abused extensions like .tk, .ml, .xyz, .top, and newly registered domains commonly used in phishing campaigns and scam websites.
100% Privacy-First Architecture
All security analysis happens locally in your browser using offline databases. Zero data collection, no external API calls, no tracking. Your browsing history stays completely private.
Real-Time Threat Detection Engine
Instant domain analysis as you browse with zero performance impact. Phishing attempts and malicious URLs are detected and blocked before you even land on dangerous pages.
Ready to browse the internet safely without worrying about phishing scams?
Install Free Phishing ProtectionFrequently Asked Questions
Learn how GlyphSentinel protects you from phishing attacks, IDN homograph scams, and online threats
Still have questions about phishing protection or GlyphSentinel?
Get in touch with our support team