Free Web Security & DNS Audit Tools

Use free web security and DNS audit tools for headers, TLS, DNS, DMARC, CORS, APIs, technologies, WHOIS, and subdomain checks.

Free Security and DNS Audit Tools

The PentestHint VAPT Tools platform provides quick checks for public-facing security posture, DNS hygiene, TLS configuration, headers, email security, exposed technologies, and common web reconnaissance needs.

Available Tools

  • HTTP Security Headers Checker: Check HSTS, CSP, X-Frame-Options, Referrer-Policy, and other browser security headers.
  • Clickjacking Risk Checker: Check iframe and frame protection using X-Frame-Options and CSP frame-ancestors.
  • CORS Misconfiguration Detector: Detect risky CORS behavior, wildcard origins, reflected origins, and credentialed exposure.
  • TLS Weak Cipher Analyzer: Analyze TLS versions, certificate metadata, expiry, and weak cipher exposure.
  • JWT Misconfiguration Scanner: Decode JWT header and payload and check algorithm, expiry, and sensitive claim risks.
  • DNS Misconfiguration Checker: Review DNS security posture including SPF, DMARC, CAA, MX, NS, TXT, and address records.
  • Web App Low-Risk Vulnerability Scanner: Check robots.txt, sitemap.xml, cookie flags, headers, and baseline web hardening issues.
  • Technology Stack Fingerprinting Tool: Identify visible server, framework, CMS, CDN, and JavaScript library fingerprints.
  • API Version & Deprecated Endpoint Finder: Probe common versioned API paths such as /api/v1, /api/v2, /v1, and /v2.
  • DMARC/SPF Email Security Checker: Check DMARC, SPF, DKIM, and MX records for public email security posture.
  • DNS Lookup Tool: Dump public DNS records including A, AAAA, MX, NS, TXT, SOA, and CAA.
  • Subdomain Finder: Discover public subdomains using certificate transparency and DNS resolution checks.
  • WHOIS Lookup: Review registrar, creation date, expiry date, nameservers, privacy, and public WHOIS data.
  • SSL Certificate Expiry Checker: Check SSL certificate issuer, validity dates, days remaining, and TLS metadata.

How to Use These Results

Tool output should be treated as initial evidence for triage. For production systems, PentestHint recommends validating findings manually, reviewing business context, and retesting after remediation.

Talk to PentestHint

Contact PentestHint to discuss scope, business context, timelines, evidence requirements, and practical next steps for improving security posture.