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Opssembly

Free infrastructure diagram tool

Design infrastructure.
Think together.

Turn servers, containers and connections into a clear picture. Build your architecture in the browser, then bring your team into the same diagram.

Open Opssembly See how it works

Free to use. No account required.

Your architecture, in one workspaceEDITOR
Opssembly's dark-theme infrastructure editor with a resource toolbox, connected Docker and Kubernetes resources, and a properties panel.
The real editor: choose resources, connect your infrastructure and inspect its properties. Diagrams are for planning, not live deployments.View full size
From edge to application
  • Networks
  • Docker
  • Kubernetes
  • Databases
  • GitHub & GitLab
  • Jenkins

Built for the conversation

More than boxes and lines.

For DevOps, platform and software teams who want to understand a system before changing it.

Give resources their context

Place applications inside Docker hosts and workloads inside Kubernetes clusters. Keep related resources together, with properties such as hostnames, IP addresses and ports.

Show how the pieces talk

Describe traffic and dependencies with labeled connections. Set arrow direction, line style, color and thickness so the important paths stand out.

Work through it together

Invite up to three others into a live room. Use voice, text chat and temporary drawing to explain an idea directly on the shared diagram.

Live collaboration

Talk it through. Mark it up.

Keep the conversation next to the diagram. See who's in the room, join voice and exchange messages in a floating panel. Use temporary drawings to point out what you mean.

A shared diagram and a shared conversationLIVE ROOM
Two guests collaborating in Opssembly with a floating voice and text chat panel, a green circle around a firewall, and a highlighted PostgreSQL resource.
A real two-person room with voice, chat and markup. Pen and marker drawings stay separate from the saved infrastructure design.View full size

A simple place to start

From an idea to a shared plan.

No blank-page problem. New projects start with an editable infrastructure example.

Go to your projects

  1. Name your project

    Open the app, choose New project and give your design a name. Explore the example or adapt it to your own environment.

  2. Make the architecture yours

    Drag in resources, edit their properties and connect them. Map a local network, a container platform or a CI/CD workflow.

  3. Save it or invite someone in

    Keep a project in this browser and download a .opssembly backup. Start a live room when you want to work together.

Good to know

A few honest answers.

Is Opssembly free? Do I need an account?

Yes, it is free to use. You can create projects and join live rooms as a guest without signing up. Opssembly is a personal project built to make infrastructure discussions easier.

Does it deploy or manage real infrastructure?

No. Opssembly is a visual planning and discussion tool. Adding a server, a Docker host or a Kubernetes cluster creates a diagram resource, not a running service.

Where are my designs saved?

Local saved projects and recovery drafts use this browser's local storage; they do not automatically follow you to another device. When Google sign-in is enabled, you can also choose to save personal projects to your Opssembly account and open them on another device. Local projects are never uploaded just because you sign in. Download .opssembly files as backups, especially before clearing browser data. Live rooms send the shared design to the server so participants can work together.

How does collaboration work?

Start a live room in the editor and share its invite link with people you trust. A room supports up to four people, including you. Participants can work on the diagram, chat and join voice with microphone permission. Voice availability depends on browser and network settings.

Will drawings become part of my saved project?

No. Live-room pen and marker drawings are temporary discussion aids, separate from the saved infrastructure design.

LAST UPDATES

A project that keeps improving.

Recent work on the everyday parts of designing together.

  • More expressive connectionsDirectional arrows, adjustable line weight and clearer connection controls.
  • A more comfortable workspaceCanvas navigation, collapsible panels and light or dark editor themes.
  • Live-room collaborationVoice, chat and temporary markup in a floating collaboration panel.