Free tool
HTTP Header / Security Checker
Security signals affect trust and crawl. This tool inspects your site's HTTP response headers: Strict-Transport-Security, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy and HTTPS redirect.
Related tools
Crawlability / Technical SEO
Check canonicals, meta robots, redirects and hreflang.
Performance / Core-Web-Vitals-lite
Server-timed TTFB, page weight and image weight — no browser.
Domain / DNS Health
Check A, MX, NS, SPF, DKIM and DMARC via DNS-over-HTTPS.
GEO Readiness Report
One-pass composite: audit + robots + schema + crawl + headers.
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