Site Checker

Run a full website security and performance check. Analyze HTTP headers, SSL, CMS, server info, and get a health score. Free online tool.

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Site Checker performs a comprehensive security and performance audit of any URL. It checks HTTP security headers (CSP, HSTS, X-Frame-Options), SSL certificate validity, CMS detection, server info, and redirect chains — then produces a 0–100 health score with actionable recommendations.

How it works

  1. 1Enter the URL you want to check
  2. 2Click Run Check to start the analysis
  3. 3Review the security score and detailed header report
  4. 4Follow the fix recommendations to improve your score

Who uses this tool

  • ✓Developers auditing security headers before launch
  • ✓Security teams checking compliance with OWASP guidelines
  • ✓Website owners monitoring SSL and redirect health
  • ✓SEO professionals identifying technical issues
  • ✓Freelancers generating client security reports

Frequently Asked Questions

What does Site Checker analyze?
It checks HTTP security headers, SSL certificate, CMS detection, server software, redirect chains, and produces an overall security score.
Is Site Checker free?
Yes, free for basic checks. Higher usage limits are available on paid plans.
How is the score calculated?
The score is based on presence and correctness of security headers (CSP, HSTS, X-Frame-Options, etc.), SSL validity, and redirect chain safety.
Does it check my server's actual files?
No. It only makes standard HTTP requests — the same requests any browser would make.

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