HTTP Security Headers Auditor

Audit HTTP security response headers (CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, COOP/COEP/CORP) for any URL. Returns a 0-100 grade, letter rating, and a prioritized fix list with exact header values to add. Single polite GET per URL, no crawling.

Security Headers Auditor

junipr/security-headers-auditor

Audit website security headers such as CSP, HSTS, X-Frame-Options, Referrer-Policy, and Permissions-Policy.

Bulk HTTP Security Headers Analyzer - CSP, HSTS

logiover/bulk-http-security-headers

Analyze HTTP security headers for thousands of URLs. Checks CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy and more. Returns pass/fail per header plus a numeric security score. No API key, export to CSV/JSON. Ideal for security audits and compliance scanning.

🛡️ Security Headers Checker

taroyamada/security-headers-checker

Audit HTTP security headers in bulk across hundreds of websites. Extract OWASP compliance grades and detect missing HSTS or CSP directives instantly.

Security Headers Checker — OWASP Audit & Grading

accurate_pouch/security-headers

Audit 12 HTTP security headers (HSTS, CSP, X-Frame-Options, Referrer-Policy, Permissions-Policy, COOP, CORP, COEP). A-F grading, actionable recommendations. 5 URLs free.

Security headers checker for any URL: pass a list of URLs, get one JSON record per URL with the observed CSP, HSTS, X-Frame-Options and related headers, missing-header findings, and a security grade. Pay per result — cost is bounded by the URLs you submit.

OSINT Website Intelligence Analyzer

onescales/website-intelligence-analyzer-osint

All-in-one website analysis tool. Run 30 OSINT checks on any URL — DNS, SSL, WHOIS, tech stack, security headers, email security, open ports, and more. Get a complete site profile in seconds.

Check public security.txt readiness: contact, expiry, canonical, policy, encryption, risk labels, hashes, and useful-result pricing.

HTTP Probe -- TLS, Security Headers, Redirects

jungle_synthesizer/ssl-security-headers-checker

Bulk site-health probe: TLS certificate, security-header grading (CSP, HSTS, X-Frame-Options, Permissions-Policy + 5 others, A/B/C/D/F grade), redirect chain, TTFB, HTTP/2 + HTTP/3, IPv6 reachability. Built for devops, security, and CI pipelines.

SEO Site Checker (Pay per Event)

eiv/seo-site-checker

Crawl any website and extract 70+ on-site SEO metrics — meta tags, Core Web Vitals, structured data, mobile-friendliness, security headers, and page speed. Get a complete SEO audit with per-check scores and actionable recommendations.

Tech Stack Detector — Bulk Website Technology Lookup

accurate_pouch/tech-stack-detector

Detect frameworks, CMS, analytics, CDN, hosting, chat tools, and more for any list of URLs. No API key needed — reads public HTTP headers and HTML.