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extension Chrome Extension · by Cloud Captains

NetPlottr Map your infrastructure. Own your data.

Draw network and infrastructure diagrams fully locally in your browser. No cloud logins, no latency, no tracking. Your diagrams stay on your own device.

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Cloud Captains kapitein tekent een diagram op een krijtbord

Why NetPlottr?

One extension to map your entire infrastructure. No account, no cloud.

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Local-first

Your diagram data is stored nowhere but your own device's memory. Nothing goes to a server.

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Works offline

After installation no internet connection is needed. Instant load, instant drawing.

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No account

No signup, no telemetry, no tracking. Install and start drawing.

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Component library

Pre-built building blocks: servers, databases, web servers, mail servers, containers, services, storage and API gateways.

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Properties per component

Give every element a name, badge, status color and network details such as an IP address or MX record.

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Zones and notes

Group components into zones like internet or DMZ and add notes for context.

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Themes and languages

Light, dark and colored canvas themes. The interface is available in multiple languages, including English and Dutch.

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Keyboard shortcuts

Work fast with Ctrl+Z for undo, Shift+click for multi-select, Del to remove and Space+drag to navigate.

How it works

From blank canvas to presentable diagram in three steps.

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1. Drag, Drop, Done

Drag pre-built icons onto the canvas. Smart alignment and multi-select keep everything tidy.

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2. Smart Linking

Connections auto-route with clean curves. Add protocol badges and traffic flow animations that bring your diagram to life.

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3. Export & Present

Export as PNG with a transparent or themed background, or copy your diagram straight to the clipboard.

A glance inside NetPlottr

Clean canvas, smart connections, fully customizable.

NetPlottr editor with component library, status badges and IP addresses in dark mode
NetPlottr editor with component library, status badges and IP addresses in dark mode
Properties panel with name, badge, status color and network information per component
Properties panel with name, badge, status color and network information per component
Zones and auto-routed connections with traffic flow between components
Zones and auto-routed connections with traffic flow between components

Who is it for?

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DevOps engineers

Visualize K8s clusters, VPC peering and full environments without leaking sensitive infrastructure data to a cloud service.

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Solution architects

Professional diagrams for presentations, proposals and documentation, ready in minutes instead of hours.

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Students and teachers

Learn and teach networking concepts with a tool that works instantly, anywhere, without installing heavy software.

Up and running in one minute

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Open the Chrome Web Store

Click the install button on this page to go straight to the NetPlottr page in the Web Store.

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Add to Chrome

Click "Add to Chrome" and confirm. The extension is ready to use seconds later.

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Pin and draw

Pin NetPlottr via the puzzle icon in the top-right and start your first diagram right away.

Documentation and guide

Want to learn drawing network diagrams with NetPlottr step by step? Our docs environment contains a full guide with eleven articles.

menu_book Open the docs

Frequently Asked Questions

Is NetPlottr free? expand_more
Yes, the extension is completely free to use. No hidden subscriptions or in-app purchases.
Where is my diagram data stored? expand_more
Nowhere but your own device's memory. There is no cloud storage and nothing is sent to a server.
Does NetPlottr work offline? expand_more
Yes. After installation the extension needs zero internet connection.
Which components are available? expand_more
Among others servers, databases, web servers, mail servers, containers, services, storage/NAS and API gateways, complemented by zones and notes to structure your diagram.
Can I import existing Visio or Draw.io files? expand_more
No. NetPlottr imports its own .frank project files and .json files. Visio and Draw.io formats are not supported.
How do I save my work for later? expand_more
Save your diagram as a .frank project file. Open that file later to continue working.
Which keyboard shortcuts are available? expand_more
Ctrl+Z for undo, Shift+click for multi-select, Del to remove elements and Space+drag to pan across the canvas.
How do I share my diagram with others? expand_more
Export as PNG with a transparent or themed background, or copy the diagram to your clipboard with one click and paste it into a presentation or document.
In which languages is NetPlottr available? expand_more
The interface is available in multiple languages, including English and Dutch.
Where do I find a guide? expand_more
Our docs environment at docs.cloud-captains.com contains a step-by-step NetPlottr guide.

Questions or feedback?

Found a bug or have an idea for a new feature? We'd love to hear from you via the contact form.

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