All your network tools, connected.

Free, private network utilities. Subnet calculator, Cisco config analyzer, VLSM planner and more — all in your browser.

Browse tools About

A free, independent project. It may have bugs, so please verify critical output and tell us what breaks.

The toolkit

Eight focused utilities that work together.

IPv4 subnetting with instant results, binary view and multi-format masks.

Convert IP addresses between decimal, binary, hex and more.

Strong passwords with Cisco-compatible mode and strength meter.

Plan variable-length subnets with overlap detection and CSV export.

Parse Cisco running-config: inventory, IP plan, security audit.

Build a clean Cisco config from a guided form. Copy-paste ready.

Trace a packet through your ACL, line by line.

Compare two Cisco configs by category. Clear, readable output.

Draw your network topology, or auto-generate it from CDP/LLDP output.

Private, fast, and free forever.

Everything runs in your browser. No tracking, no logs, no accounts.

Open the page in any modern browser. No download, no account, no setup.

Pipe your VLSM plan into the config generator. Your workflow, streamlined.

100% free. No tracking, no account required.