There are several ways to generate UML diagrams via texts such as PlantUML and mermaid. One of Astah users, Evan Chen wrote a script to convert Astah diagrams for PlantUML and mermaid.js. Currently there are scripts for converting Sequence diagrams and Flowcharts. Script Overview:Astah_Jude_UML_export_to_Markdown-mermaid-Plantuml- Scripts: To PlantUML:Sequence Diagrams To mermaid:Sequence Diagrams