Link Safety Checker

A small Python tool that takes a URL and returns a risk score plus a list of reasons. Designed as a teaching project for URL parsing and basic web-security fundamentals — no ML, no third-party reputation feeds, just heuristics that explain themselves.

What it checks:

• Suspicious patterns — IDN homograph attacks, excessive subdomains, IP-as-host
• Structural anomalies — data: and javascript: schemes, embedded credentials
• Redirect chain — follows up to N hops, flags chains that change TLD
• Heuristic signals — punycode, percent-encoded ASCII letters, very recent TLDs

The output is human-readable and the signal weights live in a single heuristics.py so contributors can tune them without touching the CLI.

Source: github.com/AlesSystems/Link-Safety-Checker-URL-Security-Analyzer.