Free Website Security Checker
Find out if your website is secure in under 60 seconds. One scan checks SSL certificates, security headers, DNS configuration, malware, known vulnerabilities, and server misconfigurations.
What We Check
Six security categories, checked in a single scan.
SSL / TLS
Certificate validity, expiry date, cipher strength, protocol version, and HSTS configuration.
- Certificate chain validation
- TLS 1.0/1.1 deprecation check
- HSTS and preload status
Security Headers
Presence and correct configuration of the HTTP security headers browsers rely on to block attacks.
- Content-Security-Policy
- X-Frame-Options, HSTS
- Permissions-Policy, Referrer-Policy
DNS Security
DNS signing, email authentication records, and CAA records that prevent certificate mis-issuance.
- DNSSEC validation
- SPF, DKIM, DMARC
- CAA record presence
Malware Detection
JavaScript analysis for malicious patterns, card skimmers, cryptominers, and data-exfiltration scripts.
- Magecart / card skimmer detection
- Obfuscated script analysis
- Third-party script reputation
Vulnerabilities
Known CVEs in detected software versions, checked against the NIST NVD database with CVSS scoring.
- CMS version detection (WordPress, etc.)
- Plugin and library CVEs
- EOL software flagging
Misconfigurations
Server and application settings that expose information or create exploitable attack surface.
- Directory listing enabled
- Exposed config files and admin panels
- CORS and cookie misconfiguration
Also Included in the Scan
Attackers scan continuously
Automated bots probe every public website for known vulnerabilities around the clock. A misconfiguration or unpatched plugin is found within hours of being introduced.
Most issues are invisible
A missing security header, an expired certificate, or a compromised third-party script does not break your site. It just quietly leaks data or exposes your visitors to attacks.
Compliance requires evidence
PCI-DSS, ISO 27001, and cyber insurance policies increasingly require documented security checks. A dated scan report is evidence of due diligence.
Frequently Asked Questions
What does this website security checker test?
The scan runs over 30 checks across six categories: SSL/TLS certificates, HTTP security headers, DNS security (DNSSEC, SPF, DMARC), malware and malicious scripts, software vulnerabilities (CVEs), and web misconfigurations. Results arrive in under 60 seconds.
Is it safe to scan my website?
Yes. All checks are read-only and use only standard HTTP requests. No exploit payloads, no traffic generation, and no changes to your site. Safe for production websites.
How is this different from a vulnerability scanner?
Most vulnerability scanners focus on a single category. ScanTower checks your entire security posture in one scan: transport security, security headers, email security, malware, supply chain risks, and server misconfigurations all in the same report.
What counts as a security issue?
Issues are classified as critical, high, medium, or low. Critical issues (exposed databases, known exploitable CVEs) need immediate attention. Lower severity findings (missing optional headers, outdated but unpatched software) are improvements worth addressing over time.
How often should I check my website security?
Security posture changes every time you update software, change DNS records, or add third-party scripts. A monthly manual check is a minimum. ScanTower offers scheduled scans with instant alerts so you are notified automatically when something changes.
Check once, or monitor continuously
A one-off scan tells you where you stand today. ScanTower can run scheduled scans daily or weekly and alert you the moment a new vulnerability or misconfiguration appears.
Start monitoring for freeFree plan available. No credit card required.