How to Scan Your Website for Security Vulnerabilities (Free)

Why You Should Scan Your Website Regularly

Website security isn't a one-time setup. Dependencies get updated, configurations drift, certificates expire, and new vulnerabilities are discovered constantly. Regular security scanning catches issues before attackers do.

What WebSentry Checks

WebSentry's free scanner performs a comprehensive security audit covering:

SSL/TLS Configuration

Certificate validity and expiration date
Certificate chain completeness
TLS version support (flags old TLS 1.0/1.1)
Cipher suite strength

Security Headers

Strict-Transport-Security (HSTS)
Content-Security-Policy (CSP)
X-Content-Type-Options
X-Frame-Options
Referrer-Policy
Permissions-Policy

Cookie Security

HttpOnly flag (prevents JavaScript access)
Secure flag (HTTPS only)
SameSite attribute (CSRF protection)

DNS Configuration

DNSSEC status
CAA records
Email security (SPF, DKIM, DMARC)

Server Configuration

Server version exposure
X-Powered-By leakage
Open redirect vulnerabilities

How to Use WebSentry

Go to websentry.dev
Enter any URL in the scanner
Click "Scan" and wait 10-15 seconds
Review your A-F security grade and detailed findings

Each finding includes an explanation of the issue and actionable advice on how to fix it.

Free vs. Paid Scanning

The free tier gives you 3 scans per month — perfect for checking your own site. If you need more:

Pro plan — Unlimited scans, scan history, scheduled monitoring of up to 5 sites, API access
Agency plan — Everything in Pro plus 25 monitored sites, ideal for agencies managing multiple clients

Check our pricing page for details.

Scanning Best Practices

Scan after every deployment to catch configuration regressions
Set up scheduled monitoring for critical production sites
Scan both your main domain and subdomains (api., cdn., staging.)
Re-scan after making security fixes to verify they worked