Astah PlantUML Plugin 1.0.0 – A Major Upgrade!

We’re excited to announce the release of Astah PlantUML Plugin v1.0.0 – now more powerful than ever!

This plugin lets you import PlantUML code into Astah and export Astah diagrams as PlantUML, enabling smooth, two-way conversion between the two formats.

In this latest release, we’ve expanded support for more diagram types and model elements than ever before. And now, it’s available for Astah UML as well as Astah Professional!

If you haven’t tried it in a while, now is the perfect time to explore what’s new.

Visit the Astah x PlantUML Plugin page

What’s New in PlantUML Plugin v1.0.0?

1. Support for UseCase Diagrams

You can now import and export UseCase Diagrams in addition to the previously supported diagram types.

UseCase Diagram on Astah with PlantUML Plugin installed

2. Expanded Model Element Support Across Diagram Types

We’ve added many new notations for the existing supported diagram types: Class Diagrams, Sequence Diagrams, Activity Diagrams, and Statemachine Diagrams.

Highlights include:

Common
- Notes
- Partial support for color styles
Class Diagrams
- Stereotypes
- Multiplicity and labels displayed together
Sequence Diagrams
- Create/Destroy messages
- Combined fragments (excluding multiple operands)
State Machine Diagrams
- Triggers and guards
- Nested states
Activity Diagrams (Legacy Notation)
- Join/Fork nodes
- Decision nodes

Astah Class Diagram using PlantUML Plugin

3. Improved Flexibility

Previously, conversions could overwrite existing diagrams. Now, the plugin creates a new diagram every time you convert, allowing you tmore flexible workflows without altering your original models.

4. Now Supports Astah UML

The plugin was previously limited to Astah Professional, but it now supports Astah UML too!

PlantUML × Astah – The Best of Both Worlds

We designed this plugin to bring together the strengths of PlantUML and Astah models, so you can choose the right tool for every stage of your work.

PlantUML Advantages:

Quickly create diagrams in a text-based format
Great integration with Markdown and Git
Great for exchanging design ideas with AI

Astah Advantages:

Create and edit diagrams without learning PlantUML syntax
Produce clear, visually optimized layouts
Structure and track relationships between elements
Maintain consistency across multiple diagrams
Integrate with other models and access via APIs

Example Workflow Using the PlantUML Plugin

With the strengths of “Lightweight PlantUML” and “Detailed Modeling in Astah”, you can:

Start diagramming quickly in text with PlantUML.
Import into Astah to add details and expand your models.
Export models as PlantUML code for AI analysis.
Read out blog post: “Astah x AI Integration – Part 1: Introduction to AI-Based Model Analysis”
Refine PlantUML code and re-import into Astah.
Finalize your models using Astah’s powerful features – polish layouts, run scripts, and integrate with other tools via the API…etc.