Free Website Vulnerability Scanner
Website Vulnerability Scanner
Scan a public website for common vulnerabilities, security misconfigurations, weak headers, TLS issues, DNS risks, cookie problems, SEO issues, accessibility gaps, performance regressions, and information disclosure.
Sign in with Google or GitHub to run the scan. Start with a free scan.
What this tool checks
This page uses ZeriFlow's deterministic website security engine and focuses the guidance on the configuration area above. For the full report, run a complete free security scan.
Related Resources
Key Checks
Security Misconfigurations
Find missing headers, weak cookie flags, TLS issues, DNS risks, and exposed metadata.
Website Security Report
Get a readable score, prioritized findings, and practical fixes for common website security issues.
Public Security Trends
Compare your result with aggregate website security statistics from public-safe ZeriFlow scan trends.
Developer-Friendly Checks
Use results before launch, after deployment, or during recurring security reviews.
Full ZeriFlow Scan
Move from a focused vulnerability check to broader deterministic website checks, monitoring where enabled, reports, API access on supported plans, and AI-powered developer workflows where implemented.
Recommended Baseline
Headers
Use CSP, HSTS, X-Frame-Options or frame-ancestors, Referrer-Policy, and Permissions-Policy where appropriate.
TLS
Use HTTPS everywhere, valid certificates, modern TLS versions, and reliable HTTP-to-HTTPS redirects.
Cookies
Set Secure, HttpOnly, and SameSite on sensitive cookies, especially session and authentication cookies.
Monitoring
Re-scan after deployments and monitor production sites for configuration drift.
Benchmark
Review /website-security-statistics to understand aggregate score trends and common failed checks.
FAQ
Can I compare my score with public website security statistics?
Yes. ZeriFlow publishes aggregate website security statistics so you can compare your scan result with broader public trends without exposing private user data.
What is a website vulnerability scanner?
A website vulnerability scanner checks a public website for common security issues, misconfigurations, weak headers, TLS problems, cookie risks, DNS issues, and information disclosure signals.
Is ZeriFlow a replacement for penetration testing?
No. ZeriFlow helps identify common website security issues and recurring misconfigurations. Use it alongside manual testing for high-risk systems.
Can I scan my website for free?
Yes. ZeriFlow offers a free website security scan that returns a score, findings, and practical remediation guidance.
What does the full ZeriFlow scan include?
The full scan covers headers, TLS/SSL, DNS, cookies, email security, SEO, accessibility, performance, information disclosure, and other common website security signals.
Need the full security picture?
ZeriFlow combines deterministic website checks across headers, TLS, DNS, cookies, and email security with monitoring, reporting, and AI-powered developer workflows where implemented.