UML Designer

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Neon (4.6)

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Solution Description

UML Designer is a graphical tool to edit and vizualize UML 2.5 models.

It uses the standard UML2 metamodel provided by Eclipse Foundation and it implements the following generic UML diagrams:

  • Package Hierarchy
  • Class Diagam
  • Component Diagram
  • Composite Structure Diagram
  • Deployment Diagram
  • Use Case Diagram
  • Activity Diagram
  • State Machine
  • Sequence Diagram
  • Profile Diagram


For those seeking to generate code from their UML diagrams, UML Designer integrates java generators and reverse.

As it is based on Sirius, it provides an easy way to combine UML with domain specific modelling. You can extend the provided diagram definitions and seamlessly work on both UML and DSL models at the same time.


This designer is free (Open Source with EPL license).


You can easily modify it with Sirius to adapt each diagram to your needs or combine it to your own DSL. To start customizing this module, just import the source code of UML Designer from Github.

More detail on the UML Designer website.

If you have any feedback, tell us on the forum, fill in our survey or report an issue.

Additional Details

Eclipse Versions: Neon (4.6)

Platform Support: Windows, Mac, Linux/GTK

Organization Name: Obeo

Development Status: Production/Stable

Date Created: Wednesday, July 9, 2014 - 05:43

License: EPL

Date Updated: Wednesday, August 1, 2018 - 11:36

Submitted by: Obeo Products

Date Ranking Installs Clickthroughs
May 2024 0/0 0 15
April 2024 0/0 0 13
March 2024 0/0 0 14
February 2024 0/0 0 15
January 2024 0/0 0 15
December 2023 0/0 0 14
November 2023 0/0 0 20
October 2023 0/0 0 26
September 2023 0/0 0 20
August 2023 0/0 0 20
July 2023 0/0 0 11
June 2023 0/0 0 13
View Data for all Listings

Unsuccessful Installs

Unsuccessful Installs in the last 7 Days: 2

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Marketplace Drag to Install Button

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Drag to your running Eclipse* workspace. *Requires Eclipse Marketplace Client

Reviews Add new review

I can install and use 'Read-To-Use Package' UML Designer 9.0.0 from

But once I am trying to install UML Designer on the top of Eclipse IDE 2022‑06, Sirius 7.0.2 from Marketplace or 'Install New Software', it is simply not cooperating and saying UML Designer will not be installed. 

Is it pre-installed and "buggy by default" in Eclipse Java (EE) 4.9.0?

When i go the the market place (with client version 1.7.6), i just see "Learn more" instead of "Install" - so i think it's pre-installed an, so as already said, "buggy by default"...

Otherwise i would see an "Install"-button, instead of the "Learn more"-link, right?!?

And i can't create some UML class diagrams from Java source code, i didn't saw any options for that.

And a "special" kind of project, e.g. specific for UML, is also not available in the project list.

So what to do in that situation? Any workarounds, or better, solutions for that issue?

Thank you for your feedback.

Regards, Jan

Hi ,


i can not install Obeo UML Designer for Eclipse Photon. I used direkt Marketplace client and normal Marketplace but no way (((

Can You help me .


Thanks in advance !!!

Eclipse Neon.3 Release (4.6.3)
Build id: 20170314-1500

Cannot complete the install because one or more required items could not be found.
  Software being installed: UML Designer (
  Missing requirement: UML Designer ( requires ' 0.0.0' but it could not be found

Im trying to install it by Drag n Drop but nothing happens. Did the same with other apps to confirm its an issue related to this one and seems so since the other apps were installed. Any workaround? :D

I forgot to include that message

Some sites could not be found.  See the error log for more detail.
No repository found at jar:file:/home/harrykar/Downloads/!/.
No repository found at jar:file:/home/harrykar/Downloads/!/.

Cannot complete the install because one or more required items could not be found.
  Software being installed: UML Designer SDK (
  Missing requirement: UML Designer ( requires ' 0.0.0' but it could not be found
  Cannot satisfy dependency:
    From: UML Designer SDK (
    To: []


Any clue?


Really guys?! I'm gonna have a hard time giving a positive review if the install doesn't even work...

On a completely fresh Eclipse Oxygen instance I got the following error:

Cannot complete the install because one or more required items could not be found.
  Software being installed: UML Designer SDK (
  Missing requirement: UML Designer ( requires ' 0.0.0' but it could not be found
  Cannot satisfy dependency:
    From: UML Designer SDK (
    To: []



I can see it'll be the most powerful uml designer plugin,but now,it shows too many bugs,most terrible is that , the first,after create the class diagram,when drag a class icon to the canvas,it shows a error dialog,and the canvas always show blanks,but i can see the new class item in the left explorer.and second,when close the canvas ,i can't open the class diagram canvas any more,unless i restart the eclpse.

I have installed it in Eclipse Neon, worked with the first go.
A bit of a change of mindset if you come from a IBM Rational Software Architect perspective. I love the separation of model information (.uml) from the view information (.aird), it solves a huge complain from many of my colleagues in the financial services industry, especially if you are into model driven development; why parse a huge file (model + view) when you are just interested in the model only.
Also love the fact it is Eclipse EMF based, loads of previous eclipse plugins can still be ported with slight modification.
Keep up the good work!

The UX is appalling, the usability product bears no relation to the "Getting Started" tutorial on the plugins website and doesn't appear to function correctly via exploration. Add lots of meaningless/opaque options but most result in empty and non-functioning popups. Uninstall doesn't function correctly, with numerous options left handing around in Eclipse.

So many errors, I must been submitted at least 20 different bugs in less than 20 minutes.
I couldn't find the Java generator code.
I have a "decent pc" with SSD, and every action takes between 3-7 seconds to response

Horrible resolution on my 23 inch iMac, horrible UI totally unfriendly and that was only on the most basic class diagram!

When trying to do the "Create an UML project" tutorial, I see the following error message:
"Error loading cheat sheet content.
Cheat sheet content file '/doc/cheatsheets/CreateProject.xml' could not be parsed, error at line '47', column '9'."
And the tutorial is not launched.

I looked for this file and I found it in the following path:
The file has effectively an error at line 47, in a followed by a text that has closing quotation mark but not has not opening quotiation mark and lacks the "label" attribute definition, making it an invalid XML file.
However, after adding the "label" attribute and quotation mark for the text and saving the file, eclipse still shows the same error message when trying to launch the tutorial, even if the file is now valid XML.

Cannot find a solution for this issue.

An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Problems downloading artifact: osgi.bundle,org.eclipse.sirius.ext.draw2d,
Unpacking fails because intermediate file is empty: C:\Users\xxxxxxxxx\AppData\Local\Temp\work4622808328056068620\p2.optimizers.incoming4745924479072133283.jar
Problems downloading artifact: osgi.bundle,org.eclipse.sirius.ext.emf.tx,
Unpacking fails because intermediate file is empty: C:\Users\xxxxxxxxx\AppData\Local\Temp\work3982720829601481646\p2.optimizers.incoming6719448505873110298.jar
Problems downloading artifact: osgi.bundle,org.eclipse.sirius.ext.jface,
Unpacking fails because intermediate file is empty: C:\Users\xxxxxxxxx\AppData\Local\Temp\work3708266169983724662\p2.optimizers.incoming7529775369526635172.jar
Problems downloading artifact: osgi.bundle,org.eclipse.sirius.ext.swt,
Unpacking fails because intermediate file is empty: C:\Users\xxxxxxxxx\AppData\Local\Temp\work658474874266879097\p2.optimizers.incoming5367194775227000847.jar