Free network tools that run in your browser, no account and nothing to install. The ones marked live work today; the rest are designed and waiting on our lookup backend.
IP tools
What Is My IP
LiveYour public IPv4 or IPv6 address, country, protocol and TLS version, detected instantly.
Open toolIP Lookup
Coming soonASN, ISP, organisation, route and abuse contact for any public address.
IP Location
Coming soonCountry, region and city estimate for an address, with the limits of geolocation explained.
IPv6 Test
Coming soonWhether your connection has working IPv6, and which address family your browser prefers.
IP Converter
LiveDotted decimal, binary, hexadecimal and 32-bit integer forms of any IPv4 address.
Open toolSubnet Calculator
LiveNetwork, broadcast, usable range and host count for any IP and CIDR prefix or mask.
Open toolDNS tools
DNS Lookup
Coming soonA, AAAA, CNAME, MX, NS, TXT and SOA records for any domain, from a resolver of your choice.
DNS Checker
Coming soonSee how a record resolves from locations around the world to watch propagation.
Reverse DNS
Coming soonThe PTR record behind an IP address.
WHOIS
Coming soonRegistrar, registration and expiry dates, and nameservers for a domain.
Network tools
Port Checker
Coming soonTest whether a port on your public IP, or any host, is reachable from the internet.
Ping
Coming soonRound-trip time and packet loss to a host from our servers.
Traceroute
Coming soonThe path packets take to a destination, hop by hop.
Blacklist Check
Coming soonWhether an IP appears on common spam and abuse blocklists.
SSL Checker
Coming soonCertificate chain, expiry, issuer and protocol support for any HTTPS site.
MAC Address Lookup
Coming soonThe manufacturer behind a hardware address.
Browser tools
User Agent
LiveYour browser’s full user-agent string, decoded into browser, version and platform.
Open toolBrowser Info
LiveLanguage, platform, time zone, cookies, and what your browser reveals to sites.
Open toolScreen Resolution
LiveViewport, screen size, pixel ratio and colour depth of the device you are on.
Open toolWebRTC Leak Test
LiveWhether WebRTC exposes your local or real IP behind a VPN or proxy.
Open toolProxy Check
Coming soonSigns that your connection passes through a proxy or VPN.
About these tools
Everything marked live runs entirely in your browser: nothing you enter is sent to us or stored. Tools marked coming soon need a server to perform the lookup; each one will appear on this page as it ships. Results are provided for information and troubleshooting and should not be the only basis for security decisions.