About NetworkTools

NetworkTools is a free collection of online network engineering tools built for network engineers, system administrators, DevOps professionals, and students. We started this project because existing tools were either outdated, cluttered with ads, or required login to use basic functionality.

Every tool on this site is designed to be fast, accurate, and privacy-respecting. No login is required for any calculator or lookup tool. We support IPv4, IPv6, VLAN planning, cloud networking (AWS, Azure, GCP), BGP filtering, MAC lookups, and more — with new tools added regularly.

The site is maintained by a small team of network engineers with experience across enterprise networking, cloud architecture, and cybersecurity. We believe that good network design tools should be accessible to everyone, whether you’re studying for the CCNA or designing a multi-region cloud deployment.

NetworkTools is free and will remain free. We use minimal, privacy-conscious advertising to cover hosting and domain costs. If you have feedback or a tool you’d like to see, get in touch.