Network Tools
Fast networking utilities that run entirely in your browser.
No accounts. No uploads. No server-side processing.
Runs 100% locally Every calculation happens on your device.
No accounts or uploads Your input never leaves the browser.
Works offline Tools keep working after the first visit.
Tools
Everything below runs client-side — pick a tool and start typing.
CIDR Calculator
Calculate network ranges, masks and available hosts.
/cidr
Subnet Calculator
Subnet math from an IP address and a mask.
/subnet
Netmask ⇄ CIDR
Convert between subnet masks and CIDR prefixes.
/netmask
IPv4 Converter
Convert IPv4 between decimal, integer, hex and binary.
/ipv4-converter
IPv4 Range Calculator
Count a range and split it into minimal CIDR blocks.
/ip-range
IP Checker
Check whether an IPv4 address is private, public or reserved.
/ip-check
IPv6 Tools
Validate, expand, compress and classify IPv6 addresses.
/ipv6
MAC Address Tools
Validate and reformat MAC addresses.
/mac
Port Reference
Search a reference of well-known TCP and UDP ports.
/ports
URL Parser
Break a URL into protocol, host, path and query parts.
/url-parser
Hash Calculator
Compute SHA-1 and SHA-2 hashes locally with Web Crypto.
/hash
Generators
Generate UUIDs, random hex strings and secure tokens.
/generators