Free Network Tools
All our free online tools for network analysis, security and privacy at a glance.
IP Geolocation
Find the exact location of an IP address – country, city, region and coordinates on a map.
Speed Test
Test your internet speed – measure download, upload and ping for free.
DNS Leak Test
Check if your DNS requests are going through your VPN tunnel or leaking to your ISP.
Port Scanner
Scan open ports on your IP address – check which services are accessible from the outside.
Blacklist Check
Check if your IP address is on spam blacklists – over 30 DNSBL databases.
Whois Lookup
Query Whois information for domains and IP addresses – registrar, owner and nameservers.
IPv6 Test
Test whether your internet connection supports IPv6 and if your IPv6 address is working correctly.
SSL Check
Check the SSL/TLS certificate of a website – validity, issuer and encryption.
HTTP Header Check
Analyze the HTTP headers of a website – security headers, caching and server information.
Subnet Calculator
Calculate IP subnets – netmask, broadcast, host range and CIDR notation.
DNS Lookup
Query all DNS records of any domain – nameservers, A, AAAA, MX, TXT, CNAME and SOA records at a glance.
Free API for Developers
Use our REST API for IP geolocation, DNS lookups and Whois queries. JSON format, no API key required.