UMLet - UML Tool for Fast UML Diagrams

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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)

https://www.umlet.com/umlet_latest/repository/
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Solution Description

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

Screenshot
Date Ranking Installs Clickthroughs
July 2026 0/0 0 0
June 2026 90/457 33 59
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
View Data for all Listings

Unsuccessful Installs

Unsuccessful Installs in the last 7 Days: 0

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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

Submitted by Jai Bin on Fri, 08/19/2016 - 03:11

Try to download this for my Eclipse, but download button not available. It's also not possible to find the tool via the marketplace in Eclipse. How can I get this tool?

Submitted by dvd gsng on Mon, 02/20/2017 - 05:05

Fix these:
- no update url
- no drag-able install icon
- not listed in Eclipse integrated marketplace search

Why isn't there a strict rule for marketplace that requires any plugin listed here to provide these? Horrible user experience.

Submitted by UMLet Team on Thu, 03/02/2017 - 05:22

A few comments to outline our view on this..

We have implemented an install icon and released it about two months ago for a few days, but hit some compatibility issues. After a relatively quick check did not result in a fix, we abandoned this thread for the time being; we want to focus on the tool itself, instead of its surrounding infrastructure, as our time is limited. But no excuse here, we just stumbled over some technicality, and, being lazy, did really not enjoy digging in.

On a more general note, I personally am not a very big fan of this drive towards "user friendly" install overheads; I personally dislike installers in general; am not fond, e.g., of the "virtual drive downloads" on OS X for many tools (why the extra layer?); and am bothered by how many plugins seem to hide/forget their simple basic package downloads in favor of update sites/drag-and-drop buttons etc. As for the latter, if you use Eclipse over X-Windows, or Eclipse on a server farm without internet access, these "helpful" installation methods won't work, might send Eclipse (and other tools) into a non-stop and futile internet lookup; and require relying on the old school package download anyway -- if that way is neglected or unsupported, the whole exercise becomes excruciating fast. In short, in many instances I like to download what I want directly, and in the version I choose, and start it right away. But I am aware that that's a very personal take on all this, and largely gut-driven -- we will in fact look into install support down the line again, and hope to then put this to rest.

Submitted by Michael Grouse on Thu, 05/03/2018 - 10:04

I cannot get an editing cursor to appear in the lower right window where the attributes of a class are supposed to be edited. When I click on a line, I get a yellow line highlite, and no cursor. When I type nothing happens.

I am on a clean Oxygen install on OS X.

Not useable at this point.

Submitted by UMLet Team on Wed, 05/16/2018 - 11:15

Hi,

we'll try to replicate this; given the large # of combinations of OS, Eclipse versions, and Java versions, such issues are tricky to test comprehensively. OS X & latest Ecl version is always a hot candidate for some mess-up.

Feel also free to directly notify us of such bugs via email.

Cheers,

The UMLet Team

 

Submitted by Odile LAMBERT on Sun, 09/30/2018 - 11:13

This is a very nice software but full of bugs. On xubuntu 18.04 I crashed Eclipse 5 times in 30 minutes.Conclusion it is not usable for the moment

Submitted by UMLet Team on Mon, 10/01/2018 - 09:53

Hi -- we develop and test the plugin variant of UMLet mostly on Eclipse & Windows. It's a bit tricky to also check for the myriads of other combinations. If you can reproduce the crash, could you please send the Eclipse log entries contained in your workspace's .metadata/.log to info@umet.com? Thanks, The UMLet Team

Submitted by Mei Chee on Sun, 02/24/2019 - 04:36

I am Macos Mojave user. Initially I downloaded the umlet-eclipse-p2-14.3.0.zip file, unziped and copied the com.umlet plugin version 14.3 jar file to the Eclipse plugins area but it did not work then tried to place in the p2 but it did not work.. After many attempts, I managed to install UMLet uml tool fast uml diagrams as suggested in marketplace and it worked. I created a Use Case diagram and saved it and closed Eclipse. I reopened Eclipse and tried to access my use case diagram and it hanged Eclipse and I had to force Eclipse closed. This hangs the Eclipse every time. I don't know what to do now as this is for my programming course in Australia. I have access to the error logs and I can send it if needed. 

Submitted by UMLet Team on Wed, 02/27/2019 - 09:08

Hi -- sorry to hear that, although unfort. we are not surprised.. First, it'd probably be best for you to use UMLet standalone on macOS, or if you only need very light-weight diagrams, the online version at www.umletino.com.

We are aware of an Eclipse plugin issue on macOS, but we have been unable to track it down, as the logs do not seem to point to the core issue here; we suppose it's an interplay with Swing. It usually happens with multiple UMLet windows open.

Sorry again!

The UMLet Team

Submitted by Bob Geriadiode on Tue, 03/05/2019 - 20:23

Just started to use UMLet to design a music-related database-driven application in Lazarus free pascal.  I am very impressed with UMLet's intuitive user interface.  It has enabled me to generate a suite of class diagrams at several levels of detail which exactly fit my needs. 

Submitted by jonathan comley on Sun, 06/30/2019 - 13:07

Thanks for your great tool.

Running Ubuntu 19.04 on Lenovo Yoga 530 AMD Ryzen 7 laptop.

Using UMLet from within Eclipse and right clicking on a diagram makes Eclipse crash.  Any ideas? 

Eclipse IDE for Java Developers
Version: 2019-03 (4.11.0)
Build id: 20190314-1200
OS: Linux, v.5.0.0-20-generic, x86_64 / gtk 3.24.8
Java version: 11.0.3

Submitted by Oliver Cole on Thu, 09/12/2019 - 13:49

I work for a large contractor doing air traffic control work for the FAA.  We are lookijng at using this tool (I am evaluatiing), but we would want some kind of paid support.  Do you all have maintenance/support contracts?

Submitted by Michael N. Lipp on Sun, 02/02/2020 - 09:07

I use UMLet about twice a year and have always liked it. But the current versio fails to install with:

An error occurred during the org.eclipse.equinox.internal.p2.engine.phases.CheckTrust phase.

Submitted by Michael N. Lipp on Tue, 02/25/2020 - 06:54

Looking through the log, I found "java.io.IOException: Exception in opening zip file: /home/mnl/.p2/pool/plugins/com.umlet.plugin_14.3.0.jar". Copying the file manually to that location fixed the problem (i.e. after copying, I could install from marketplace).

Here's the full stacktrace:

!ENTRY org.eclipse.equinox.p2.engine 4 4 2020-02-25 12:30:25.452
!MESSAGE An error occurred during the org.eclipse.equinox.internal.p2.engine.phases.CheckTrust phase.
!SUBENTRY 1 org.eclipse.equinox.p2.engine 4 0 2020-02-25 12:30:25.452
!MESSAGE session context was:(profile=_home_mnl_tools_eclipse-latest_eclipse, phase=org.eclipse.equinox.internal.p2.engine.phases.CheckTrust, operand=, action=).
!SUBENTRY 1 org.eclipse.equinox.p2.engine 4 0 2020-02-25 12:30:25.452
!MESSAGE Error reading signed content.
!STACK 0
java.io.IOException: Exception in opening zip file: /home/mnl/.p2/pool/plugins/com.umlet.plugin_14.3.0.jar
    at org.eclipse.osgi.framework.util.SecureAction.getZipFile(SecureAction.java:340)
    at org.eclipse.osgi.internal.signedcontent.SignedBundleHook.getSignedContent(SignedBundleHook.java:217)
    at org.eclipse.equinox.internal.p2.engine.phases.CertificateChecker.checkCertificates(CertificateChecker.java:77)
    at org.eclipse.equinox.internal.p2.engine.phases.CertificateChecker.start(CertificateChecker.java:58)
    at org.eclipse.equinox.internal.p2.engine.phases.CheckTrust.completePhase(CheckTrust.java:55)
    at org.eclipse.equinox.internal.p2.engine.Phase.postPerform(Phase.java:255)
    at org.eclipse.equinox.internal.p2.engine.Phase.perform(Phase.java:105)
    at org.eclipse.equinox.internal.p2.engine.PhaseSet.perform(PhaseSet.java:50)
    at org.eclipse.equinox.internal.p2.engine.Engine.perform(Engine.java:80)
    at org.eclipse.equinox.internal.p2.engine.Engine.perform(Engine.java:48)
    at org.eclipse.equinox.p2.operations.ProvisioningSession.performProvisioningPlan(ProvisioningSession.java:181)
    at org.eclipse.equinox.p2.operations.ProfileModificationJob.runModal(ProfileModificationJob.java:76)
    at org.eclipse.equinox.p2.operations.ProvisioningJob.run(ProvisioningJob.java:190)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: java.nio.file.NoSuchFileException: /home/mnl/.p2/pool/plugins/com.umlet.plugin_14.3.0.jar
    at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:92)
    at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
    at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116)
    at java.base/sun.nio.fs.UnixFileAttributeViews$Basic.readAttributes(UnixFileAttributeViews.java:55)
    at java.base/sun.nio.fs.UnixFileSystemProvider.readAttributes(UnixFileSystemProvider.java:149)
    at java.base/sun.nio.fs.LinuxFileSystemProvider.readAttributes(LinuxFileSystemProvider.java:99)
    at java.base/java.nio.file.Files.readAttributes(Files.java:1763)
    at java.base/java.util.zip.ZipFile$Source.get(ZipFile.java:1225)
    at java.base/java.util.zip.ZipFile$CleanableResource.<init>(ZipFile.java:727)
    at java.base/java.util.zip.ZipFile$CleanableResource.get(ZipFile.java:844)
    at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:247)
    at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:177)
    at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:191)
    at org.eclipse.osgi.framework.util.SecureAction.getZipFile(SecureAction.java:322)
    ... 13 more

 

Submitted by Pelit Mamani on Sat, 05/09/2020 - 18:57

I love it! Perfect for this modern agile age, when productivity is measured through working code - not diagrams. UML is just for easy human communication, just outlining some points, it should take minutes (sometimes seconds), and that's exactly what UMLet is providing. Thanks :)

Submitted by mmisingname7v7 (not verified) on Thu, 01/28/2021 - 12:05

You can¨t work with this in current Eclipse. Hopefully you could at some point. Uninstalling this time-waster.

Submitted by Omar Enrique on Fri, 04/16/2021 - 21:25

I have problem with UMLet, right clicking on the background of the diagram causes the eclipse to crash

Im using Eclipse IDE for Java Developers Version: 2021-03 (4.19.0)
openjdk 11.0.10 2021-01-19 on ubuntu 20.04

Submitted by Steven Maxwell on Tue, 05/31/2022 - 11:19

UML generation crashes when encountering a java enum.   

Found an open issue from 2016 - umlet github issue 352 - no java enum support (sorry can't post link as it's not allowed).    So if you want to use this tool to generate UML from existing source code and your project contains enums, its a no go.

Submitted by DANIEL CASSIANI on Thu, 11/24/2022 - 08:10

<p>I LOVE the Standalone version. When you get the hang of scripting on the (THX GOD) ONLY properties box, UML goes so fast. And great simple click and drag, no need of thousands of link and fill montrous properties like EA when all you want is to drag an arrow around... Somethings are just needed as KISS. This is for those who think UML is one of those, specially on huge buroucratic companies at a new project pre-analysis phase, where you just throw some note, include different Areas to ask for new APIs in a note in an arrow, and so on...</p>

Submitted by Zhyako Baqi on Sun, 04/21/2024 - 02:56

A very easy to use tool to create all kinds of UML, I have not had any issues with it so far. Overall, 10 out of 10

Submitted by John Spaghetti on Mon, 04/13/2026 - 19:55

Best UML software for my linux distro, even better than umbrello which is problematic if you don't use KDE.

Genuinely thanks for this, starred...