SECURITY TOOLS

Free Security Tools

Scan any domain for SSL, DNS, email authentication, and HTTP security issues. Instant results, no signup required.

Encryption

Encryption Tools

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SSL Certificate Checker

Verify any domain's SSL/TLS certificate. Check validity, expiry, issuer, protocol version, and cipher strength.

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TLS Protocol Checker

Test TLS protocol support and cipher suites. Detect outdated TLS 1.0/1.1 and weak cipher configurations.

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Certificate Chain Checker

Validate your SSL certificate chain. Verify root CA trust, intermediate certificates, and chain completeness.

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Email Security

Email Security Tools

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DMARC Record Checker

Check your DMARC policy configuration. Validate alignment, reporting URIs, and enforcement levels.

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✉️

SPF Record Checker

Validate your SPF record syntax and DNS lookups. Detect common misconfigurations and lookup limits.

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📬

MX Record Lookup

Look up mail exchange records for any domain. View priorities, hostnames, and mail server configuration.

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DNS

DNS Tools

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DNS Record Lookup

Query A, AAAA, CNAME, TXT, NS, and SOA records. Check propagation and identify misconfigurations.

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DNSSEC Checker

Verify if a domain has DNSSEC enabled. Check DS records, DNSKEY records, signing algorithm, and key tags.

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Subdomain FinderPro

Discover subdomains via Certificate Transparency logs. Uncover hidden attack surface and forgotten assets.

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HTTP Security

HTTP Security Tools

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HTTP Headers Checker

Analyze HTTP security headers. Check for X-Frame-Options, Content-Security-Policy, HSTS, and more.

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HSTS Checker

Verify HTTP Strict Transport Security configuration. Check max-age, includeSubDomains, and preload status.

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CSP Checker

Analyze your Content Security Policy. Detect unsafe directives, missing policies, and inline script risks.

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Redirect Checker

Trace HTTP redirect chains. Check each hop's status code, location header, response time, and detect redirect loops.

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🍪

Cookie Security Checker

Analyze cookie security attributes. Check Secure, HttpOnly, and SameSite flags for every cookie a domain sets.

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Performance Checker

Measure real response times for any domain. Check TCP connect time, time to first byte, and total page load against performance budgets.

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Network

Network Tools

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Open Port Scanner

Scan any domain for commonly open ports. Identify running HTTP, SSH, FTP, SMTP, and database services.

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Safe Browsing Checker

Check if a domain is flagged by Google Safe Browsing for phishing, malware, or unwanted software.

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COMPREHENSIVE SCAN

Need the full picture?

Run all 10 tools at once with a single scan. CQwerty Shield checks SSL, DNS, DMARC, SPF, headers, HSTS, CSP, TLS, certificate chains, MX records, WHOIS, breach intel, and more.

Free full scan — no signup →