Built for Coinbase Security

Stop Phishing.
Protect Your Crypto.

A real-time browser extension that verifies official Coinbase domains and detects lookalike phishing URLs using machine learning — before you click.

Download Extension Learn More →

— Trusted Domains

235K+ URLs Trained

4 Detection Layers

coinbase-support.xyz

🚨

PHISHING ALERT

Known Phishing Domain

✅

OFFICIAL COINBASE

coinbase.com — Verified

🛡️

TRUSTED SITE

google.com — Verified Popular

FEATURES

Four Layers of Protection

Every link you hover over passes through our multi-layer security engine in milliseconds.

✅

Coinbase Allowlist

Instant verification of official Coinbase, Base, and Prime domains. Zero false negatives — if it's Coinbase, you'll know.

🛡️

Top 1M Whitelist

Backed by the Tranco research list. Google, GitHub, Reddit, and 1 million+ popular sites are auto-verified as trusted.

🚨

Known Threat Blocklist

Real-time blocklist of confirmed phishing domains. Instantly flags known scam sites with a Red Alert.

🤖

ML Detection Engine

Trained on 235K+ real-world URLs. Catches new, never-seen-before phishing variants using character-level pattern analysis.

HOW IT WORKS

Simple. Invisible. Powerful.

Install the Extension

Load Phish-Guard into Chrome or Brave in under 30 seconds. No signup. No data collection.

Browse Normally

Phish-Guard silently pre-scans every link on every page you visit. Results are cached for instant retrieval.

Hover to Verify

Hover over any link to instantly see its security status — Green Shield, Gray Shield, or Red Alert.

Report Threats

Found a suspicious site? One-click report sends it to the Coinbase Security queue for review.

Ready to Protect Your Crypto?

Download Phish-Guard and browse with confidence. Free, open-source, and privacy-first.

1 Clone or download the repository

2 Open chrome://extensions

3 Enable Developer Mode → Load Unpacked

4 Select the extension/ folder

View on GitHub

Stop Phishing. Protect Your Crypto.