FREE WEBSITE SECURITY TOOLKIT

Website Security Tools & Resources

Check website security configurations, investigate common technical issues, and learn practical ways to improve your website’s security with SiteSecura’s free tools and guides.

Quick Tool Finder

What do you want to inspect today?

Select your immediate objective to launch the right specialized utility:

Featured Utilities

High-impact diagnostic tools for immediate website security inspection:

View all 9 tools
Full Assessment

Website Security Scanner

Assess your website's complete security posture with checks for HTTPS, TLS certificates, defensive HTTP security headers, DNS and email-security configuration.

Use CasePassive evaluation of public signals in under 60 seconds
Open toolRemote
SSL / TLS

SSL/TLS Certificate Checker

Inspect TLS certificate validity, expiration countdown, Subject Alternative Names (SAN), issuer trust chains, and modern cryptographic protocols.

Use CaseCertificate validity, issuer trust, and expiry monitoring
Open toolRemote
DNS Utility

DNS Lookup Tool

Query forward DNS records (A, AAAA, MX, NS, TXT, SOA, CAA) with real-time resolution, TTL timings, authoritative nameservers, and CAA issuance rules.

Use CaseInspect domain records, propagation, and mail server priority
Policy Utility

CSP Policy Analyzer

Analyze Content-Security-Policy headers against W3C Level 3 specs. Resolve directive fallback hierarchies, detect unsafe-inline/eval execution, and audit nonces.

Use CaseEvaluate W3C CSP Level 3 directives and injection resistance
Open toolOffline
Complete Directory

Security Tools, Guides & Resources

Search and filter across all standalone tools and technical hardening guides:

All Free Website Security Tools(9 tools)

Full AssessmentRemote Perimeter Assessment

Website Security Scanner

Assess your website's complete security posture with checks for HTTPS, TLS certificates, defensive HTTP security headers, DNS and email-security configuration.

Scope: Passive evaluation of public signals in under 60 seconds
SSL / TLSRemote TLS Handshake

SSL/TLS Certificate Checker

Inspect TLS certificate validity, expiration countdown, Subject Alternative Names (SAN), issuer trust chains, and modern cryptographic protocols.

Scope: Certificate validity, issuer trust, and expiry monitoring
HTTP HeadersRemote HTTP Inspection

HTTP Security Headers Checker

Review defensive HTTP response headers including HSTS, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, and Referrer-Policy.

Scope: Evaluate browser hardening headers and injection resistance
Email AuthenticationLive DNS Query

SPF, DKIM & DMARC Checker

Review DNS email-authentication records (SPF syntax, DMARC policies, and DKIM public keys) to protect your domain against spoofing and phishing.

Scope: Detect anti-spoofing record gaps and DMARC enforcement levels
DNS UtilityLive DNS Resolution

DNS Lookup Tool

Query forward DNS records (A, AAAA, MX, NS, TXT, SOA, CAA) with real-time resolution, TTL timings, authoritative nameservers, and CAA issuance rules.

Scope: Inspect domain records, propagation, and mail server priority
HTTP UtilitySSRF-Safe Hop Tracing

HTTP Status & Redirect Checker

Inspect HTTP response codes and trace complete redirect chains hop-by-hop. Audit 301, 302, 307, 308 redirects, detect SSL downgrades, and measure latency.

Scope: Trace URL hops, identify redirect loops, and detect HTTP downgrades
Compliance UtilityRFC 9116 Remote Inspection

security.txt Validator

Validate vulnerability disclosure files against RFC 9116. Inspect mandatory Contact and Expires directives, verify OpenPGP encryption armor, and check HTTPS paths.

Scope: Verify vulnerability disclosure files and security contact endpoints
Crawlability UtilityRFC 9309 & XML Validation

Robots.txt & Sitemap Checker

Inspect crawler access rules against RFC 9309, test crawl paths with longest-match rule simulator, and validate XML sitemaps and sitemap indexes.

Scope: Audit search engine crawler directives and index boundaries
Policy UtilityOffline Paste / Safe HTTPS Inspection

CSP Policy Analyzer

Analyze Content-Security-Policy headers against W3C Level 3 specs. Resolve directive fallback hierarchies, detect unsafe-inline/eval execution, and audit nonces.

Scope: Evaluate W3C CSP Level 3 directives and injection resistance
Frequently Asked Questions

Website Security FAQ

Clear, technically accurate answers about SiteSecura tools, testing capabilities, and assessment boundaries.

Yes. All standalone utility tools on the Resources page (including the DNS Lookup Tool, HTTP Status & Redirect Checker, security.txt Validator, Robots.txt & Sitemap Checker, and CSP Policy Analyzer) are free to use without subscriptions or hidden paywalls. A fair-usage rate limit (typically 15 requests per minute per IP address) is enforced to ensure reliable availability for all visitors.
Full Perimeter Assessment

Want a broader view of your website's security?

Individual tools help you investigate specific configurations. Run SiteSecura's website security scan to review the supported security checks in one place.

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