IT Toolbox: Free Browser-Based Tools for IT Pros

IT Toolbox

Free, fast, privacy-first tools for IT pros — calculators, analyzers and builders that run entirely in your browser. No sign-up, no tracking.

12Free tools

5Categories

100%Client-side

2 of 12 free tools in “Networking”

Networking

IPv4 & IPv6 subnets — network, broadcast, host range, class and a subnet divider.

Plan VLAN IDs, decode 802.1Q tags, allocate subnets and build trunk configs.