Networking Tools

IP lookups, header checkers, and other client-observable networking utilities.

Estimate how long a file will take to download at a given connection speed — instantly,…

Convert an IPv4 address between dotted decimal, binary, hexadecimal, and 32-bit decimal — instantly, in your…

Calculate network address, broadcast address, subnet mask, and usable host range from an IP address and…

See your public IP address, browser user agent, and screen resolution at a glance.