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Check what search engines and crawlers see. Every tool also answers
curl
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Webmaster
SEO & meta tag checker
See a page the way Google and social sites do: title, description, canonical, indexing, headings, previews and fixes.
robots.txt tester
Check a site’s robots.txt: can Googlebot, Bing or AI crawlers fetch a URL, which rule decides, and what’s broken.
Sitemap validator
Find a site’s XML sitemap and check it: format, limits, bad URLs, dates, and whether listed pages actually load.
Web
HTTP headers
See the headers your browser sends, or fetch any URL’s response headers, redirects and security headers.
SSL certificate check
Check a site’s TLS certificate: trust, expiry, names covered, issuer and chain.
DNS & email
DNS lookup
Look up A, AAAA, MX, TXT, NS, CAA and more for a domain, or reverse-lookup an IP.
DNS propagation
Ask nine public resolvers the same question and see which still have an old answer.
WHOIS / RDAP
Who owns a domain, IP address or ASN: registrar, key dates, status, nameservers and abuse contact.
Email health
Check a domain’s MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT and BIMI setup in one go.
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