UMLet

Development

Open-source softwareEditorial overview
A CLOSER LOOK

What is UMLet?

UMLet is a lightweight UML drawing tool that favors quick diagrams and editable text-based element definitions. It includes UML diagrams, custom elements, and multiple export formats.

UML diagrams

Custom elements

Multiple export formats

Is it a good fit?

Best suited to

Developers drawing clear software diagrams without a large modeling suite

Before you choose

It is primarily a diagramming tool rather than a complete model-driven engineering suite. The Flatpak package is an unofficial repackaging of the upstream release.

Editorial assessment based on the provider’s published information. Our method

Know what you're signing up for.

The application is distributed under GPL-3.0. The listed desktop or mobile software can be used on an ongoing basis without a software subscription. It is primarily a diagramming tool rather than a complete model-driven engineering suite.

The $0 price applies to the listed open source application. It is primarily a diagramming tool rather than a complete model-driven engineering suite.

Check current official pricing

The useful parts. The trade-offs.

Why consider it

Brings UML diagrams and custom elements into the same workflow.

Sketch the key classes or interactions, refine the element text, and export a diagram for review before adding unnecessary implementation detail.

What to keep in mind

It is primarily a diagramming tool rather than a complete model-driven engineering suite.

The Flatpak package is an unofficial repackaging of the upstream release.

How to use it well

UMLet fits developers drawing clear software diagrams without a large modeling suite. Sketch the key classes or interactions, refine the element text, and export a diagram for review before adding unnecessary implementation detail.

It is primarily a diagramming tool rather than a complete model-driven engineering suite. The Flatpak package is an unofficial repackaging of the upstream release. Keep working files under version control so subsequent changes can be reviewed and reversed.

A few things you might be wondering.

Is UMLet free?

The application is distributed under GPL-3.0. The listed desktop or mobile software can be used on an ongoing basis without a software subscription. It is primarily a diagramming tool rather than a complete model-driven engineering suite.

Can I use UMLet for UML diagrams?

Yes. UMLet includes UML diagrams. Sketch the key classes or interactions, refine the element text, and export a diagram for review before adding unnecessary implementation detail.

Is UMLet a complete model-driven engineering environment?

It is primarily a diagramming tool rather than a complete model-driven engineering suite.

Where can I check the latest prices?

Use the provider link on this page. Billing period, location, team size, promotions, taxes, and optional extras may affect the amount you pay.

How should I compare this tool with alternatives?

Choose tools for the same task, then compare their feature limits, platform support, and total cost for your team. The Compare button helps you keep a shortlist.

Are the user reviews moderated?

Yes. New reviews are submitted for moderation. We show published user reviews separately from the editorial overview and never assign a default user rating.

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