About Network Tools

Inspect your browser, calculate IPv4 subnets, parse user agents and URLs, and look up common ports — 100% in your browser with no uploads, no API calls and no signup.

Privacy-first by design

Unlike most online tools that upload your files to a server, Network Tools does all the work right inside your browser with modern JavaScript and WebAssembly. That means your files are never sent anywhere — it's faster, works offline once loaded, and keeps your data completely private.

Free forever

All tools are free to use. The site is supported by unobtrusive advertising so we can keep building and maintaining useful utilities.