About NetOps.tools
What NetOps.tools is, who makes it, and why every calculation runs entirely in your browser.
NetOps.tools is a free, no-login field kit for network engineers. Subnet and VLSM planning, IPv6 conversions, MAC/OUI lookup, a port reference and live DNS — the everyday utilities you reach for, gathered into one fast console.
Everything runs in your browser
All the maths — subnetting, address conversion, EUI-64, MAC formatting — happens locally in JavaScript. Nothing is uploaded, logged or tracked. The one exception is the DNS Lookup tool, which queries records over DNS-over-HTTPS directly from your browser to Cloudflare 1.1.1.1 (falling back to Google) — no server of ours sits in the middle.
Open & fan-made
NetOps.tools is built and maintained by Simon Foy. Found a bug or want a tool added? The source lives on GitHub.