Check a site's SSL certificate, redirects and security headers, DNS propagation, email security, ping and traceroute — all in one place.
Checks whether a name is free in 18 popular extensions — .com, .net, .org, .co, .io, .ai, .biz and more — live, one by one.
Lists subdomains that have appeared in public SSL certificates (Certificate Transparency logs), with when they were first and last seen.
Converts internationalized (e.g. Arabic) domain names to the ASCII "xn--" form DNS uses, and back.
Checks the HTTPS certificate on port 443: whether browsers trust it, the names it covers and when it expires.
Follows the redirects from http:// to the final page and grades the security headers browsers rely on.
Shows where a website is hosted and the technologies it runs on — CDN, web server, CMS, frameworks, analytics and libraries.
Shows how the page looks when shared on social media and checks its title, description, headings, canonical link, robots.txt and sitemap.
Query any DNS record type — CAA, SRV, DNSKEY, HTTPS, PTR and more — through Cloudflare or Google.
Asks 10 public DNS resolvers and the domain's own name servers, so you can see whether a DNS change has spread.
Checks the records that decide whether mail from this domain is delivered and protected from spoofing.
Checks an IPv4 address — or a domain's web and mail server addresses — against 16 public spam blocklists that mail servers use to reject email.
Who owns an IP address: organization, network, autonomous system (ASN), country and reverse DNS.
Sends ICMP echo requests and reports whether the host replies and how fast.
Shows every network hop between Domainat's server and the host, live.
