An open-source network simulation & visualization tool based on the NS3 library

More verbosely

Net-runner allows users to create networks with various topologies and devices in user-friendly interface. This website is designed for learning purposes, with the goal of illustrating the inner working of the internet in a simple and elegant way.

How to use it?

Create your network

Add some nodes (like PC's, Wifi routers, switches) and connect them with each other. For each node you can set up some applications. IP addresses are assigned automatically.

Launch an simulation

Each packet will be animated as it's transitioning between nodes in real life.

Analyze the traffic

With the help of built-in PCAP visualization tool you can analyze all details of transitioned packets.

Try it now! Go to the playground.