UML Diagram StudioUML Studio

Structural UML

Component Diagram Maker

Show how larger software pieces depend on each other. Start from the template, rename components to match your system, and export for architecture notes.

Features

  • Live editor for component diagram maker
  • Starter template included on the page
  • PNG and SVG export
  • No install required

Need a blank canvas? Open the full UML studio.

What you can model

Component diagrams map logical or deployable parts, interfaces, and dependencies. Use them for modular monoliths, library boundaries, and service-style components before you zoom into runtime topology.

How to use this maker

Group related components in packages, draw dependency arrows in the direction of use or ownership, preview the layout, then export PNG or SVG for RFCs and onboarding docs.

Notation that matters

Components appear as boxes (often with stereotype styling). Dependencies are dashed or solid arrows depending on your convention. Interfaces can be shown when the contract itself matters. Keep external systems visible so boundaries stay honest.

Keep the diagram readable

One diagram should answer one architecture question. Hide internal classes unless they define a public boundary. Use the deployment diagram maker for hosts and containers, and the microservices diagram maker when service mesh topology is the story.

Frequently asked questions

Is this component diagram maker free?

Yes. Create and export in the browser without a subscription.

Component diagram or deployment diagram?

Component diagrams focus on software structure. Deployment diagrams show where those pieces run.

Should every class become a component?

No. Components are larger units of structure. Keep fine-grained types on a class diagram.

Related tools

Browse the full UML diagram tools directory or return to the UML diagram hub.