Domain tools
WHOIS, availability, IDN, TLD info, subdomains
Domain availability
Check if a name is available across 20+ popular TLDs.
Punycode / IDN converter
Convert internationalised domain names to/from xn-- ASCII form.
Domain WHOIS
Registrar, dates, name servers, contacts, DNSSEC status.
Subdomain enumerator
Discover subdomains via Certificate Transparency logs (crt.sh).