IP Address Converter
Convert IPv4 addresses between dotted, integer, hex and binary, and expand or compress IPv6.
Network Tools
Subnets, IP addresses, MAC addresses and user agents — worked out in your browser.
MAC Address Formatter
Reformat a MAC address with colons, hyphens or Cisco dots, and see whether it's multicast or locally administered.
Subnet Calculator (IPv4 CIDR)
Find the network, broadcast, host range, mask and host count for any IPv4 address and prefix.
User Agent Parser
Read the browser, version, operating system and device type from a user-agent string.