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Crawl a site, read its headers, check its DNS. Tools that report what they measured — and say so when they cannot measure it.

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Analytics, only if you say so

We would like to use Google Analytics and Microsoft Clarity to see which tools get used and where pages go wrong. Clarity also records how a page is used — clicks, scrolling, mouse movement. Neither runs until you accept, and the tools all work either way. What we collect.

All tools/Domain & DNS

DNS Propagation Checker

Ask four public resolvers for the same record and see which ones disagree.

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Also in Domain & DNS

Domain to IPResolve a domain to its IPv4 and IPv6 addresses, with reverse lookup.Needs a domain name Find DNS RecordsA, AAAA, MX, NS, TXT, SOA and CNAME records in one lookup.Needs a domain name SSL Certificate CheckerIssuer, validity dates, days remaining and the names a certificate covers.Needs a domain name Hosting CheckerWho serves a site: IP, reverse DNS, nameservers and server headers.Needs a domain name Whois LookupRegistrar, creation and expiry dates straight from the WHOIS server.Needs a domain name SPF, DKIM & DMARC CheckerThe DNS records that decide whether your mail lands, or gets spoofed.Needs a domain name

DNS Propagation Checker — SEO Toolbox