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Free security tool
Find outdated frontend libraries with known risk
Detect common JavaScript libraries and flag versions that may have known security issues or update needs.
Run the full scan
Get this check plus the complete WebSentry security report for the URL.
What it checks
Library detection
Version exposure
Known vulnerable versions
Outdated dependencies
Public CDN usage
Why it matters
Old frontend libraries can expose visitors to known vulnerabilities and are often forgotten after launch.
Common fixes
Upgrade vulnerable libraries
Remove unused scripts
Pin and review third-party CDN dependencies
Turn one check into ongoing protection.
Create an account to save scan history, export reports, and monitor sites for security grade drops.