DuckIntel / Security Tools

Network Diagram Builder

Drag-and-drop SVG network diagram builder. Add firewalls, routers, switches, servers. Draw connections, label with IPs and VLANs, export as SVG.

The Network Diagram Builder is a browser-based SVG topology tool that lets you drag and drop network nodes — firewalls, routers, switches, servers, workstations, cloud services, databases, laptops, and mobile devices — and connect them with labeled arrows to build a visual network map. Export the finished diagram as an SVG file for use in documentation, incident reports, or architecture reviews.

Network diagrams are essential documentation artifacts in security. During an incident response engagement, having an accurate network topology diagram helps responders understand blast radius, identify affected segments, and plan containment. During threat modeling or penetration testing scoping, a diagram provides the shared understanding needed for effective communication between technical and non-technical stakeholders.

The tool supports IP address labels, VLAN tags, and security zone annotations on nodes. Connection arrows can be labeled with protocols and port numbers. The drag-and-drop interface requires no specialized software — it runs entirely in your browser. All diagram data is stored in localStorage so your work persists between sessions.

Features

10 node types: firewall, router, switch, server, workstation, cloud, database, and more
Drag-and-drop SVG canvas
IP address and VLAN labeling
Connection arrows with protocol and port labels
Export as SVG
Zoom and pan
All data saved to localStorage

Part of DuckIntel.io — 59 free browser-based security tools for SOC analysts. No login. No tracking. 100% client-side.