Free tools
Free domain and website tools
Free tools for checking a domain and a website: look up a domain’s registration over RDAP, read its DNS records, check its SSL certificate, see whether the site answers right now, and turn a few words into domain name ideas. No sign-up, and each check runs once, when you ask for it.
Tools
Pick a tool
- WHOIS lookupRegistrar, dates, status and name servers, from the registry itself over RDAP.Open the tool
- DNS checkA, AAAA, MX, TXT, NS, CAA and CNAME records, as public DNS sees them.Open the tool
- SSL checkWho issued the certificate, when it expires, the names it covers and whether the chain is trusted.Open the tool
- Uptime checkWhether a site answers right now: its status code, response time and redirects.Open the tool
- Name ideasA few words in, domain name ideas out, each one checked for you on request.Open the tool
Looking for the open-source tools from our engineers? They are on our About page.
FAQ
About the free tools
Yes, with no sign-up. Each tool allows a few checks a minute from one connection, so they stay quick for everyone.
No. The domain or address you enter is sent to what answers it: the public DNS resolvers, the domain’s registry, the website itself, or our billing system’s domain check. We do not save it, and the tools do not log it.
No. The SSL and uptime checks connect only to public addresses on ports 80 and 443, and refuse a name that points to a private, loopback, link-local or other reserved address, so they cannot be pointed at a network behind our servers.
On our About page, with a link to each project’s own page.
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