Free website security scanner

WebGuard AI is an online website security scanner. In under a minute it runs a passive audit of any website — SSL/TLS certificate, HTTP security headers, DNS and email authentication (SPF, DKIM, DMARC), exposed files, subdomains and vulnerable software (CVEs) — then writes a plain-language report with a prioritised fix plan.

Scan my website · Pricing: Website Security Report from €12

How to check your website security

  1. Enter your website address — nothing to install, no server access needed.
  2. WebGuard runs 12 passive checks in parallel on what your site exposes publicly (10 to 40 seconds).
  3. Read your score out of 100, the issues ranked by severity and the exact fix for each one.

12 security checks in one scan

  • SSL/TLS certificate: validity, expiry date, HTTPS redirect and HSTS
  • HTTP security headers: Content-Security-Policy, HSTS, X-Frame-Options, Referrer-Policy, Permissions-Policy, COOP/COEP/CORP
  • DNS and email: SPF, DKIM, DMARC and DNSSEC against domain spoofing
  • Exposed files: .env, .git, backups and admin pages left online
  • Subdomains from Certificate Transparency logs, with subdomain takeover detection
  • Vulnerable and end-of-life software with known CVEs (Apache, nginx, PHP, WordPress, jQuery…)
  • Cookie flags: Secure, HttpOnly, SameSite
  • CORS misconfigurations: wildcard, reflected or null origin
  • Secrets in page source: API keys and tokens
  • robots.txt and security.txt (RFC 9116)
  • Subresource Integrity (SRI) on third-party scripts
  • Domain WHOIS and technology fingerprinting

Frequently asked questions

How can I check my website security for free?

Enter your site address on WebGuard AI and start the scan. In 10 to 40 seconds the scanner checks 12 areas — SSL/TLS certificate, HTTP security headers, SPF/DKIM/DMARC, exposed files, subdomains, vulnerable software and more — and gives a security score out of 100. Free scans: up to 5 a day, no credit card required.

What is a passive website vulnerability scanner?

A passive scanner only looks at what a website exposes publicly, the way a visitor would: certificate, HTTP headers, DNS records and reachable files. It sends no attack payloads, so it is safe to run on a live production site. It does not replace a penetration test, which looks for SQL injection, XSS or authentication flaws.

Which security checks does WebGuard AI run?

SSL/TLS and HSTS, nine HTTP security headers with quality checks (CSP, X-Frame-Options, Referrer-Policy…), SPF, DKIM, DMARC and DNSSEC, exposed files such as .env or .git, subdomain takeover, outdated software with known CVEs, cookie flags, CORS, secrets in page source, robots.txt and security.txt, and Subresource Integrity.

Can the scan harm my website?

No. The tool only reads what your site makes public, like a visitor. It sends no attack payload and makes a small number of ordinary requests.

Can I scan a website I do not own?

You must own the website or have its owner's permission. You are responsible for the scans you run.

How much does a full website security audit cost?

The overall score and the list of every issue are free, with fixes for the 3 most serious. A full report — every issue with its fix, the AI-written report and the PDF export — costs €12, or €49 for 5 reports and €149 for 20. One-time payment, no subscription, and credits never expire.

How do I improve my website security score?

The fixes with the biggest impact are usually: serve everything over HTTPS with HSTS, add a Content-Security-Policy, publish SPF, DKIM and DMARC records, remove sensitive files (.env, .git) from the web root and update outdated software. The WebGuard report ranks every fix by urgency.

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