Rich PlantUML support for Visual Studio Code.
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Latest commit e1d9c03 Sep 19, 2018


Rich PlantUML support for Visual Studio Code.

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  1. PlantUML formatter is disabled (since v2.8.3) if editor.formatOnSave is on. Because the formatter is not reliable enough according to user feedbacks.

  2. Newly designed preview provides various zoom/pan actions and snap feature:

    • Zoom operations (since version 2.7.0):
      • Zoom to select area
      • Pinch to zoom (TouchPad)
      • Click to zoom in, alt + click to zoom out
      • Ctrl + mouse scroll to zoom in/out
      • Middle mouse button click to toggle zoom
      • Zoom in / zoom out / toggle buttons of the controls bar.
    • Pan operations (since version 2.7.0):
      • Right mouse button drag
      • Two-finger move to pan (TouchPad)
      • Mouse scroll
    • Snap to border (since v2.8.0):
      • Scroll to most bottom/right/top/left, preview will snap to that border.

      e.g. Snap to Bottom is useful while writing long activity diagrams, which helps you keep focus in the latest part in the bottom.


Get 15X times faster export by utilizing PlantUML Server as render. How to?

  • Preview Diagram, Press Alt-D to start PlantUML preview.
    • Auto update.
    • Zoom & scroll support.
    • Multi-Page Diagram support.
    • Instant preview, if diagram's been exported.
    • From local or server.
    • Snap to Border NEW!!
  • Export Diagrams
    • At cursor, in current file, in whole workspace, in workspace selected.
    • Concurrent export.
    • Generate URLs.
    • Multi-Page Diagram support.
    • From local or server.
    • Image map (cmapx) support.
  • Editing Supports
    • Format PlantUML code.
    • All type syntax highlight.
    • All type snippets.
    • Auto Include.
    • Symbol List support.
  • Others
    • Multi-root Workspace Support.
    • MarkDown integrating support. View Demo
    • Extracting source from images support.

Notice: If you use customize plantuml.jar, please update to the latest version to enable Multi-Page Diagram support. (Later than V1.2017.15)

Supported Formats

*.wsd, *.pu, *.puml, *.plantuml, *.iuml

How to install

Launch VS Code Quick Open (Ctrl+P), paste the following command, and press enter.

ext install plantuml


Depend on which render you choose, plugin has diffrerent requirements.

Requirements for PlantUMLServer render

A plantuml server. See Use PlantUML Server as render.

Requirements for Local render

It's necessary to have following installed:

  • Java : Platform for PlantUML running.
  • Graphviz : PlantUML requires it to calculate positions in diagram.

Plugin has integrated a copy of "plantuml.jar", you are good to go now. But if you want to use your own jar (maybe a newer version, or with many dependent jars), specify the jar location with setting plantuml.jar.

If you've installed java, but still prompts "java not installed", please add java bin path to PATH environment variable.

For windows user, majkinetor introduced a way to install plantuml and its dependencies easily. Run cmd.exe as Administrator, and run two commands as follow

@"%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -Command "iex ((New-Object System.Net.WebClient).DownloadString(''))" && SET "PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin"

choco install plantuml

Preview and Export Demos

Auto update:

audo update demo

zoom & scroll:

zoom demo

Multi-Page View:

Multi-Page demo

Export diagram:

export demo

Generate URLs:

url demo

Extract Diagram Source

extract demo

About Format

format demo

About Snippets

snippet demo

This plugin integrates all type diagram snippets. They are splitted into 9 sections:

  • ;diagram: snippets for general diagrams elements.
  • ;activity: snippets for activity diagrams.
  • ;class: snippets for class diagrams.
  • ;component: snippets for component diagrams.
  • ;state: snippets for state diagrams.
  • ;usecase: snippets for usecase diagrams.
  • ;sequence: snippets for sequence diagrams.
  • ;ui: snippets for salt diagrams.
  • ;egg: snippets for some funny diagrams, like sudoku, earth.

For exsample, type ;activity if else condition or ;acif (short version) to trigge following snippet:

if (cond1?) then (val1)

else (val2)


About Symbol List (List diagrams of file)


Press Ctrl+Shift+O to list all diagrams in the file. You can name the diagram when diagram starts.

@startuml diagram name sudoku @enduml

About Render

Plugin supports two renders: Local and PlantUMLServer.

Local is the default and traditional way. If you care more about export speed, you should try PlantUMLServer.

Local: 6 documents, 9 digrams, 14 files exported in 24.149 seconds
PlantUMLServer: 6 documents, 9 digrams, 14 files exported in 1.564 seconds

Advantages and disadvantages of PlantUMLServer render


  • 15X times faster export and much quicker preview response.
  • Don't have to set local enviroments if you have a server in your team.
  • You don't need plantuml.exportConcurrency, because it's unlimited in concurrency.


  • Cannot render very-large diagrams (HTTP 413 error).
  • Cannot render diagrams with !include in it.
  • Less format support: png, svg, txt.
  • Some settings are not applicable: plantuml.jar, plantuml.commandArgs, plantuml.jarArgs.
  • Cannot collect syntax error of diagrams in report.

Use PlantUML Server as render

  • You may already have a PlantUML server in your team, find the server address, like:

  • If don't have one, you can set up on you own (follow the instructions). Find the server address, like: http://localhost:8080/plantuml, or which is ready for sharing to your team.

  • Open user setting, and configure like:

"plantuml.server": "",
"plantuml.render": "PlantUMLServer",

About Auto Include

Notice: People who don't use !include could ignore this chapter.

include demo

Auto Include liberates you from writing "!include path/to/include.wsd" everywhere. which is bother & hard to manage.

Suppose we have 2 files to include: defines.wsd and myStyles.wsd, and they are organized as follow:

├── includes
│   ├── defines.wsd
│   └── myStyles.wsd
├── sources
│   ├── sourceA.wsd
│   └── sourceB.wsd
├── out

In the past, we have to include them manually in every single diagram:

!include ../includes/defines.wsd
!include ../includes/myStyles.wsd
'contents goes here...

Now, you can just replace them with a placehold 'autoinclude,

'contents goes here...

and open workspace setting and config:

"plantuml.includes": [

About integrated theme

Plugin shipped with a blue diagram theme, to enable it, config like:

"plantuml.includes": [

Multiple languages support

Translations are welcome. lang.nls.json, package.nls.json

languages demo

MarkDown integrating

markdown demo

@startuml / @enduml is still recommended, so that PlantUML code in Markdown can be managed by other function of this plugin.

Extension Settings

This extension contributes the following settings:

  • Java executable location.
  • plantuml.jar: Alternate plantuml.jar location. Leave it blank to use integrated jar.
  • plantuml.fileExtensions: File extensions that find to export. Especially in workspace settings, you may add your own extensions so as to export diagrams in source code files, like ".java".
  • plantuml.exportFormat: format to export. default is not set, user may pick one format everytime exports. You can still set a format for it if you don't want to pick.
  • plantuml.exportSubFolder: export diagrams to a folder which has same name with host file.
  • plantuml.exportConcurrency: decides concurrency count when export multiple diagrams.
  • plantuml.exportOutDirName: export workspace diagrams will be organized in a directory named with value specified here.
  • plantuml.exportMapFile: Determine whether export image map (.cmapx) file when export.
  • plantuml.previewAutoUpdate: Dedecides if automatically update the preview window.
  • plantuml.server: PlantUML server to generate UML diagrams on-the-fly.
  • plantuml.render: Select diagram render for both export and preview.
  • plantuml.urlFormat: URL format. Leave it blank to pick format everytime you generate a URL.
  • plantuml.urlResult: URL result type. Simple URL or ready for MarkDown use.
  • plantuml.includes: Files or folders to include before preview/export diagrams. You don't have to write "!include path/to/include.wsd" for every single diagram any more.
  • plantuml.commandArgs: commandArgs allows you add command arguments to java command, such as -DPLANTUML_LIMIT_SIZE=8192.
  • plantuml.jarArgs: jarArgs allows you add arguments to plantuml.jar, such as -config plantuml.config.

Known Issues

Please post and view issues on GitHub




Thanks for your encouragements!

Claus Appel, 三島木​一磨, 富吉​佑季