Free Online Network Tools
IP, WHOIS, DNS, certificates, HTTP, WebSocket — everyday lookups for debugging domains and endpoints, all free to use.
IP Lookup
Look up your public IP, or the geolocation, ISP, ASN and timezone of any IP or domain
Open tool →WHOIS Lookup
Look up a domain's registrar, creation and expiry dates, status and nameservers
Open tool →DNS Lookup
Look up a domain's A / AAAA / CNAME / MX / TXT / NS records, with a one-click common set
Open tool →HTTP Client
Send GET / POST and other requests to any URL; inspect status, headers and body
Open tool →WebSocket Tester
Connect straight from your browser to a WebSocket service, send messages and read a timestamped log
Open tool →SSL Certificate Check
Check a domain's certificate issuers and validity, flagged as expiring or expired
Open tool →Why these network tools?
One-stop diagnostics
IP geolocation, WHOIS, DNS records, certificate validity, HTTP responses and WebSocket connections — six kinds of checks in one place, no hopping between sites.
Queries leave no trace
Lookups are relayed through this site's server to public data sources, and the server does not log query content; the WebSocket tester connects straight from your browser.
Free and frictionless
No sign-up, no install — just open and use. An 8-language interface that works on desktop and mobile browsers.