@wafer-li 's hexo-filter-plantuml has been transfered to me duo to maintain issues.

I have created another hexo plugin called hexo-filter-kroki, which supports 20+ diagrams (including plantuml).

Features

• Generate raw/base64/urlencoded svg at compile time, no external css and js required.
• Privacy guaranteed. Support rendering locally or self-hosting server.
• Zero npm dependencies.

How Does it work

Install

npm install --save hexo-filter-plantuml

Minimum configuration

No configuration required. By default, it will send your text to plantuml.com for rendering, and the base64-encoded images will be inlined in the html.

Advanced configuration

Server-side(recommend)

Please keep in mind, if you want more about privacy/safety, please replace your own self-hosting render server.

plantuml:
  #  Local or PlantUMLServer.
  render: "PlantUMLServer"

  # The render server, you can also create your self-hosting sever
  # self-hosting cmd: java -jar /usr/local/Cellar/plantuml/1.2021.5/libexec/plantuml.jar -picoweb
  # server: http://localhost:8080/plantuml
  server: "http://www.plantuml.com/plantuml"
  # "inline": <svg>xxx<svg/>
  # "inlineUrlEncode": <img src='data:image/svg+xml;> 
  # "inlineBase64": <img src='data:image/svg+xml;base64> 
  # "localLink": <img src="/assert/puml/xxxx.svg">
  # "externalLink": <img src="http://www.plantuml.com/plantuml/svg/xxx">
  link: "inline"

  # common options: svg/png
  outputFormat: "svg"

Client-side

It may be slower for plantuml.jar will restart JVM per code fragment.

plantuml:
  #  Local or PlantUMLServer.
  render: "Local"

  # "inline": <svg>xxx<svg/>
  # "inlineUrlEncode": <img src='data:image/svg+xml;> 
  # "inlineBase64": <img src='data:image/svg+xml;base64> 
  # "localLink": <img src="/assert/puml/xxxx.svg">
  link: "inline"

  # where your dot binary
  GraphvizDotFile: "/usr/local/bin/dot"
  # where your jar
  PlantJar: "/usr/local/Cellar/plantuml/1.2021.5/libexec/plantuml.jar",

  # common options: svg/png
  outputFormat: "svg"

How to use it?

puml and plantuml directives both work.

​```plantuml
@startuml
Object <|-- ArrayList
Object : equals()
ArrayList : Object[] elementData
ArrayList : size()
@enduml
​```

@startuml and @endpuml are ALWAYS required or the image will fail to be generated.

or

{% plantuml %}
@startuml
Object <|-- ArrayList
Object : equals()
ArrayList : Object[] elementData
ArrayList : size()
@enduml
{% endplantuml %}

Plugin will pick up block body and replace it with generated base64 svg diagram.

see more details at http://plantuml.com/sitemap-language-specification