Build real networks on your own computer.

No more fixing permissions.

Copy an image in and it simply works. netplex gives every file the right ownership and access on its own, so you never open an SSH session just to run a fix-up script again.

Drop it in. Walk away.

Copy an image into the uploads folder - over SCP, SFTP or straight onto the disk. Seconds after it lands, netplex recognises it, files it in your Library and gets it ready to use. No scan button, no hunting for settings. And if something can't be imported, it tells you why, in plain words.

Built on tools engineers already trust.

Inside, netplex uses well-known free tools: QEMU and KVM to run virtual routers, Docker to run small containers, and Open vSwitch (a virtual network switch) for every cable. Solid at the core - everything we added sits on top.

Draw your network the way you like.

Drag, drop and connect. Every device is a clean Halo card with its own icon inside, in the accent colour you pick. Choose straight, curved or right-angled links, tidy everything with one-click auto-layout, add notes and shapes, then switch to presentation mode and draw on your lab while you explain it.

See your network talk.

Watch a cable glow the moment two routers start talking (for example OSPF or LLDP messages). Pick the protocols you care about - CDP, LLDP, BGP, STP and around sixty more, each in its own colour - and let the rest stay quiet. It's the quickest way to see what your network is really doing.

Make the network slow or flaky on purpose.

Add delay, lost packets or a speed limit to any cable - while it runs. Turn a perfect lab into a slow, busy link in seconds and see how your design copes.

Start building in minutes. No licences needed.

FRR routers, VyOS, Open vSwitch, Nokia SR Linux and Alpine hosts are one click away. Drag one onto the canvas and netplex fetches it for you the first time you use it. Bring your own vendor images whenever you're ready.

Every lab, safely in git.

netplex can back your lab - topology and device configs - up to a git remote you own (GitHub, GitLab, Bitbucket or your own server). Compare any two versions side by side and roll back with one click.

Let your AI assistant lend a hand.

netplex works with MCP, the common way AI assistants control other apps. Connect an MCP-compatible assistant such as Claude Code and ask it to build a lab, start devices, run commands or check that routing has settled - with read-only mode and confirmations keeping you firmly in control.

Wireshark, right in your browser.

Click any cable and watch the packets go by, inside netplex. Open any packet to see what is in it. Nothing to install on your own computer.

Packet list: every plan · full Wireshark window: Professional

Freeze a moment. Branch from it.

Save a freeze point of the whole lab, every device at once. Later, go back to it - or start a brand new lab from that exact moment and try a different idea.

Professional

Push your own code.

One command on your laptop turns your project folder into a device on the canvas. It also works from a VS Code task or a git commit. No build server needed.

Every plan · 1 image on Associate, 10 on Professional

Watch the AI work.

When your AI assistant changes something, a strip at the top says what it did, and the device it touched flashes on the canvas. You always see what it is doing.

Every plan

Network Scanner.

Drop a scanner into your lab. It finds every device and its open ports, so you can check that your firewall really blocks what it should.

Professional

Take your lab to your own tools.

Download your lab as an SSH config, a hosts file or a Nornir inventory - or as a draw.io, Mermaid or Graphviz diagram.

Every plan