No. 8 of 26 ·Network Documentation Software

Open Network Diagram

Web · Self-hosted · API

Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Open Network Diagram is ranked #8 of 26 in network documentation software on Freedom251. It runs on API, Self-hosted, Web. There is a free plan.

Open Network Diagram plans and pricing

All plans

Open Network Diagram Free Self-hosted · Docker deployment · GNU GPL v3 github.com · 2 Oct 2026

Compared on network documentation software

Free plan: Yes
Device inventory: Yes
IP address management: Yes
Network diagrams: Yes
Relationship mapping: Yes

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The record

Purpose: Open Network Diagram is a declarative, self-hosted containerised tool for visualising and managing home lab and network architecture diagrams.
Data model: The application keeps a JSON source of truth that can be backed up, reused and optionally versioned.
Views: It provides network, Hosts & VMs, and rack views for infrastructure inventory and topology mapping.
IPAM: The IPAM panel shows per-subnet utilisation, detects duplicate IPs and suggests the next free IP.
Cabling: Connections can track cable type, colour and length with colour-coded links and hover details.
Persistence: Self-hosted mode autosaves JSON data and keeps the last five rolling backups.
Deployment: The project is Docker-first and supports writable data volumes plus Docker Compose deployment.
Platforms: Published Docker images support AMD64 and 64-bit ARM, including Raspberry Pi systems.
API: The runtime exposes GET and PUT operations at /api/network-data.
Integrations: The tool has no runtime dependency on external APIs and includes a locally vendored icon catalogue for offline-friendly operation.
Security: Open Network Diagram does not include authentication or TLS.
Security limit: The README advises against exposing a writable deployment directly to the internet and recommends a firewall, LAN or VPN, or an authenticated TLS-terminating reverse proxy.
Read-only mode: NETWORK_READ_ONLY=true disables changes for public demonstrations but does not hide a configured topology or provide authentication.
Audience: The project is positioned for home lab users who need an up-to-date map of machines, virtual machines, devices and rack placement.
Price from: Free

Where it ranks on Freedom251

Best Network Documentation Software in 2026#8 of 26

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Sources

github.com/jcreek/OpenNetworkDiagram· checked 1 Oct 2026