The free UML tool UMLet lets you draw UML diagrams with a light-weight, pop-up-free user interface. It lets you draw diagram sketches fast; export diagrams to pdf, eps, jpg, gif, svg, bmp, png, and system clipboard; share diagrams using Eclipse 3+; and create your own custom graphical elements.
Categories: Documentation, Graphics, Modeling Tools, Tools, UML
Tags: UML, education, UML sketches, Favorite, Fast UML, Java Test, UMLet, Free UML for Eclipse, good, Amazing, y, to download, spam, funny
Additional Details
Eclipse Versions: 2023-03 (4.27), 2022-12 (4.26), 2022-09 (4.25), 2022-06 (4.24), 2022-03 (4.23), 2021-12 (4.22), 2021-09 (4.21), 2021-06 (4.20), 2021-03 (4.19), 2020-12 (4.18), 2020-09 (4.17), 2020-06 (4.16), 2020-03 (4.15), 2019-12 (4.14), 2019-09 (4.13), 2019-06 (4.12), 2019-03 (4.11), 2018-12 (4.10), 2018-09 (4.9), Photon (4.8), Oxygen (4.7), Neon (4.6), Mars (4.5), 2023-06 (4.28), 2023-09 (4.29), 2023-12 (4.30), 2024-03 (4.31), 2024-06 (4.32), 2024-09 (4.33), 2024-12 (4.34), 2025-03 (4.35), 2025-06 (4.36)
Platform Support: Windows, Mac, Linux/GTK
Organization Name: The UMLet Team
Development Status: Production/Stable
Date Created: Saturday, November 5, 2005 - 23:50
License: GPL
Date Updated: Friday, October 6, 2023 - 10:50
Submitted by: UMLet Team
| Date | Ranking | Installs | Clickthroughs |
|---|---|---|---|
| July 2026 | 0/0 | 0 | 0 |
| June 2026 | 81/540 | 79 | 132 |
| May 2026 | 68/608 | 224 | 322 |
| April 2026 | 52/612 | 363 | 320 |
| March 2026 | 56/627 | 350 | 275 |
| February 2026 | 48/620 | 394 | 253 |
| January 2026 | 84/631 | 217 | 105 |
| December 2025 | 66/621 | 278 | 43 |
| November 2025 | 64/626 | 354 | 26 |
| October 2025 | 69/637 | 345 | 29 |
| September 2025 | 63/653 | 368 | 34 |
| August 2025 | 94/615 | 194 | 30 |
| July 2025 | 86/636 | 250 | 28 |
Unsuccessful Installs
Unsuccessful Installs in the last 7 Days: 1
| Count | Error Message |
|---|---|
| 1 | Cannot continue the operation. There is another install operation in progress. |

Reviews Add new review
installation problems
Submitted by Jeff Collier on Thu, 04/12/2012 - 17:14
Its not clear how to install this plugin; Is the URL correct?
Installation
Submitted by UMLet Team on Wed, 10/03/2012 - 05:08
In reply to installation problems by Jeff Collier
On http://www.umlet.com/changes.htm you can see the change history, and download current and older versions of UMLet.
--The UMLet Team
Update Site
Submitted by Sven Köhler on Mon, 04/23/2012 - 11:19
The UMLet authors don't seem to provide an update site. Dear UMLet authors, can you fix that? Pretty please with sugar on top.
Z-Order
Submitted by Whisnu Sucitanuary on Mon, 05/14/2012 - 10:57
How to change the order of elements?
Z-order
Submitted by UMLet Team on Wed, 10/03/2012 - 05:10
In reply to Z-Order by Whisnu Sucitanuary
Explicit z-order control (useful for pdf exports of background-colored elements) will probably be included in v12.1; not yet in the upcoming v12.0.
--The UMLet Team
Hooray!
Submitted by Marcus Kelvin on Tue, 06/12/2012 - 08:32
This saved my life today when the UML app I paid for suddenly proved inadequete. But everything brightened back up again after a few minutes playing with umlet! Thanks!! One of the nicest new pieces of software I've used in a while. Totally straightforward, works smoothly, and the combination drag n' drop + text config interface is a GREAT IDEA. I used it stand-alone, and I bet the XML file format would be easy to parse for, eg, a custom code generator.
Simple, fast, beauty
Submitted by Luis Rodríguez… on Fri, 09/21/2012 - 13:37
Thanks!
good
Submitted by tian lin on Fri, 11/16/2012 - 21:42
cool,thanks!
Excellent open source software
Submitted by Ismet Mustafic on Fri, 01/25/2013 - 11:37
Easy to use. Took me only a couple,of minutes to get the hang of how to construct diagrams. Recommended!
Seopatodo
Submitted by seopatodo seopatodo on Thu, 02/21/2013 - 10:51
thank you very much very easy to use.
Just the right fit
Submitted by Apurva Singh on Sat, 03/02/2013 - 09:05
...for simplicity and power. After having used Rose, RSA, Visual Paradigm etc. I fell for Umlet. It is exactly what a programmer needs. Neither complex, nor lacking in capability.
great app
Submitted by tomer st on Mon, 03/04/2013 - 07:27
great app
Great App
Submitted by Maciej Ostrowski on Thu, 03/21/2013 - 13:49
Umlet is really practical tool.
Thumbs up
Submitted by Michael Scheepers on Sat, 04/27/2013 - 22:27
What a great tool! Really efficient and easy to use!
both thumbs up
Submitted by Jonny Kent on Wed, 05/15/2013 - 21:49
this is a really great app. Easy to use. Well done!
Used nearly daily.
Submitted by Simon Rorke on Tue, 06/18/2013 - 11:50
I have a very low budget for software - open source all the way.
I use UMLet for ALL my drawing needs.
Any diagram explaining a process, idea, flow chart, whatever - UMLet.
Thanks for an excellent tool :-)
Wonderfull
Submitted by alessandro Mis… on Thu, 06/20/2013 - 05:21
Great app!!!
Best tool ever
Submitted by Diego Beraldin on Fri, 08/09/2013 - 08:59
This is by far the best UML modeling tool I've ever used, it compares well with (and in many ways it overtakes) other ineffective, costly and cumbersome programs. It's easy to use, standard compliant, lightweight and free: what else can we ask? Thanks a lot guys, great work!
still the best UML tool
Submitted by megaload@ypmai… on Mon, 08/12/2013 - 07:41
pros
+simple
+easy to use
+free
cons
-no reverse engineering
-no update site for eclipse
PS This is the best UML tool because others including papyrus and omondo uml are unusable, probably this is a problem of GEF, which they use as their base.
I use UMLet since the TogetheJ was destroyed by Borland.
For more than 8 years UMLet is the best solution.
Thanks for the team.
At least it works
Submitted by Mike Houston on Tue, 08/27/2013 - 14:43
There are many free UML tools out there many of them don't even work. This tool does. Great free tool for putting together a quick diagram to include in your design docs. The hardest part is figuring out how to download the plugin. It would be great to have an install link right on the Eclipse Market Place. I get the fact that they are trying to make some money to support the project by putting links to SPAM ware on their site but it would be nice if they were a little clearer about what you are downloading when you click on one of the large Download links. To get the actual UML tool you have to ignore the huge green buttons to download various SPAM ware products and click on a small download link in the middle left of the page. As far as the actual application The User interface is a little different but with a little practice you can get the hang of it. It prints diagrams well and allows you to export them to many different graphical formats. A great tool for doing some quick UML diagrams but probably not the right tool for doing a large UML model.
how to install this hell plugin?
Submitted by khalil saedi on Mon, 09/16/2013 - 08:39
it became so annoying , what is the instruction to install it?
Did you google it before asking?
Submitted by Morteza Tourani on Sat, 10/19/2013 - 06:52
In reply to how to install this hell plugin? by khalil saedi
The answer is simple look at this page
www.umlet.com/faq.htm
just download jar file and put it in plugins folder of eclipse
www.umlet.com/changes.htm
You can download it here
Saves a lot of time!
Submitted by Ricardo Tubio-… on Thu, 10/03/2013 - 17:34
Even though this tool does not promise to generate your application by creating a simple diagram, at least, it works! You can create UML diagrams in very little time.
simple, easy, usefull...
Submitted by Stefan Eich on Thu, 11/21/2013 - 09:14
great, thanks a lot!
Very simple but very powerful
Submitted by Michael Price on Sat, 12/07/2013 - 06:43
I can quickly start drawing from the palette. The number of features is huge. Always adding new features. Very intuitive. Can even create my diagram elements.
What a terrible website!
Submitted by Steven Edmunds on Tue, 02/11/2014 - 10:19
I'm not sure why anyone would download this after seeing the developer's website. The sole purpose of the site looks to be tricking people into accidentally clicking on one of the many sketchy camouflaged advertisements.
Site/ads
Submitted by UMLet Team on Wed, 04/16/2014 - 12:45
In reply to What a terrible website! by Steven Edmunds
Our Web site's design could indeed be improved; it's just more fun to work on UMLet than on HTML (btw, v13 will probably be out in a few weeks). We use Google ads, and try to manually block the more aggressive ads (eg, those with large download buttons) that started to appear in the ad rotations in the last 12-18 months. (It's a bit tricky, as everyone might see different ads.)
Nice tool, but still has a lot of disadvantages
Submitted by Simon Rohlwing on Thu, 02/27/2014 - 08:01
A good alternative for dia. Especially with the support for properties of the elements.
A little awkward to use, but you get used to that quickly.
But could do much better if it had (I tested version 12.2):
- working z-order (automagical isn't working good - copied object is behind original object - who would want that?)
z-order context menu would be good
- display which element-type i'm working (may be even with support to change)
- fields for different properties
- transparency
Without correct z-ordering my diagrams look ugly.
Your suggestions..
Submitted by UMLet Team on Thu, 04/17/2014 - 12:08
In reply to Nice tool, but still has a lot of disadvantages by Simon Rohlwing
There is z-order support via the "layer=1,-1,2,-2.." command, but a bit tricky to find; v13 will have context-sensitive help in the panel, and maybe element context menu entries for layering. v13 will also allow more transparent element type handling, including on-the-fly changes between similar elements. "fields for different properties" (if I understand correctly) are unlikely to come; we prefer the single text panel approach to pop-ups, separate fields, and any other interface elements that restrict free text flow and UMLet's copy/paste logic (if I interpret this point wrong, let info@umlet.com know). Finally, all elements are transparent by default; we might look into opacity in the future.
gread
Submitted by Missing name M… on Wed, 03/19/2014 - 03:33
very great uml tool
My favorite UML editor
Submitted by Alex K on Sat, 03/29/2014 - 01:51
This is the best way to quickly sketch out diagrams! By focusing on the content the tool lets to experiment quickly and does not slow down the thinking. Other tools do not come close (well maybe SDEEdit for sequence diagrams).
I love custom elements feature too, very powerful!
Good, Free, Developing continuously, Vector Graphics Export
Submitted by Christoph Knabe on Fri, 06/06/2014 - 09:12
Instantly works. Very good for rapidly drawing ideas.
I use it regularly for producing documentation with UML diagrams inside.
In order to avoid multiple rastering defects in drawings, I use the SVG export and automatically transform the .svg files to .odg (OpenOffice Drawing and Graphics) by svg2office-1.2.2.jar.
The result looks very clean.
For manual high quality export the diagram as EPS, insert it into OpenOffice by Insert > Image > From File...
Inside OpenOffice it looks not yet good, as this uses only the EPS preview.
Then print the document to a PDF printer (Do not use export!) and you will have the diagram in high-quality vector graphics in the PDF.
very good, thanks guys!!!
Submitted by Jose Luis Jaur… on Tue, 07/01/2014 - 15:17
very good, thanks guys!!!
Excellent tool for UML.
Submitted by jose eguia on Sat, 08/23/2014 - 12:00
Very nice piece of software. Easy to use, responsive, ideal for quick UML diagrams without having any code generation baggage behind it.
Great Tool
Submitted by Avinash Anand on Mon, 08/25/2014 - 01:45
nice and easy to use tool. export feature is very helpful.
Unavailable?
Submitted by Mark Secrist on Thu, 10/30/2014 - 06:43
What the heck?? Is this no longer available? I'm logged in but now apparent download link.
Plain Simple!
Submitted by Rodrigo Alarcon on Tue, 12/30/2014 - 09:18
It will take a little to learn the fields you can add to the "properties" for each UML element but once you understand how it works it is so easy to get the job done!
Easy, fast and useful! Excelent!!
Submitted by Serch Romo on Mon, 01/12/2015 - 12:13
This is a very nice and easy to use application. To download it I visited the next URL: www.umlet.com/changes.htm
Besides if you want to get more information, then visit the web site:
www.umlet.com
No problems to run it in Linux and Windows it's so beautiful :')
Great UML Tool with some minor frustations
Submitted by Chris No on Wed, 02/04/2015 - 03:12
I love the ease of making quick UML diagrams with this. Easy to use and customize elements and charts for you own purposes. There are however a few disadvantages that drive me nuts while trying to make quick diagrams on the fly:
- Line tools like the "has a" and "is a" always get copied behind to the back layer, this is EXTREMELY frustrating when trying to align new elements up. Why would you ever want to copy a new object to the back z index? You can right click and change the layer to bring it to the front, but this just destroys the whole flow and experience.
- Its a bit tricky to grab and move the smaller elements as the grab handle for elements is relatively small.
- It takes a bit of getting used to, but ctrl selecting is used to lasso objects where simple clicks move the screen around. I understand this is more of a preference but I find it much nicer to select lasso with a simple click and use the ctrl + mouse to move around.
- When double clicking on elements (this duplicates them), it sometimes places itself at the end of another line segment automatically attaching itself to that line or connector. This means I have to either copy and paste (Which can have the same effect depending on the area of the screen, forcing me to move the screen so that the upper left corner is free (where the new element gets pasted)) or create one from the elements palatte.
Other than that, I really do like how fast I can make beautiful custom UML diagrams with little effort!
4.5/5 :D
Deactivate sticking relations
Submitted by UMLet Team on Tue, 02/24/2015 - 08:19
In reply to Great UML Tool with some minor frustations by Chris No
Quick hint on your last point: while pressing SHIFT, elements/relations don't stick (we will put this more prominently in the hints/FAQ..)
The power of simplicity
Submitted by Fabio Almeida on Wed, 08/26/2015 - 20:08
It's a simple and powerful tool.
Simple, fast and easy to use
Submitted by Rafal Piotrowski on Wed, 09/16/2015 - 04:42
Great tool.
Awesome, awesome tool.
Submitted by Binh Nguyen on Thu, 09/24/2015 - 20:03
UMLet makes going back and modifying diagrams so easy!
How to install it in eclipse.
Submitted by jianwu chen on Sun, 10/11/2015 - 20:25
There's no install button for this add on.
Simply awesome tool
Submitted by Mithun Pissay on Thu, 11/12/2015 - 07:13
Simplistic approach at UML designs and very light weight, loving it. Am using as stand alone without eclipse integration, it makes navigation and reference lookup on code very much comfortable.
Can't Download
Submitted by John Marcinek on Fri, 11/20/2015 - 07:51
There's no download button. I created an account and logged in but still no button.
Excellent and lightweight tool
Submitted by Glenn Dollard on Wed, 11/25/2015 - 09:59
No need for over-loaded UML applications, this tool fits the bill nicely.
A developer's UML tool
Submitted by Harx Mising name on Tue, 12/08/2015 - 10:12
This is an outstanding, lightweight tool for quick UML markup. This is the perfect tool for someone that is a developer, not a business analyst, and when just needs to quickly diagram some knowledge to add to a story or wiki.
I've used mostly Visio in the past but was looking for something open-source and Linux-friendly without all the bells and whistles, this is exactly what I needed.
Download button inactive
Submitted by Tomas Cabrera on Thu, 01/21/2016 - 06:28
This tool cannot be downloaded from the Marketplace, no download or install button available
Excelent app & plugin
Submitted by Andres Oviedo on Wed, 02/03/2016 - 06:36
This tool is enough to make fast simple & nice documentation.
To install the plugin just drop the jar into the 'eclipse/plugins' folder.
Enjoy