UML 2
Compatible with UML 2.x standard metamodel and diagrams: Class, Object, Use Case, Component, Deployment, Composite Structure, Sequence, Communication, Statechart, Activity, Timing, Interaction Overflow, Information Flow and Profile Diagram.

SYSML SUPPORT
Support modeling with SysML diagrams: Requirement, Block Definition, Internal Block, and Parametric Diagram.

ADDITIONAL DIAGAMS
Support to create Entity-Relationship Diagrams (ERD), Data-flow Diagrams (DFD) and Flowchart Diagrams.

CUSTOM UML PROFILE
You can define your own UML Profile with stereotypes. Each stereotype can have custom icons.

CROSS-PLATFORM
Work with same UX in multiple platforms including MacOS, Windows and Linux.

AUTO UPDATE
StarUML checks latest updates and install automatically for MacOS and Windows.

RETINA DISPLAY SUPPORT
Supports Retina (High-DPI) Display. All diagrams, texts and icons are razor sharp and can be exported to High-DPI images (PNG and JPEG).

EXTENSION MANAGER
Easily discover and install third-party extensions. Many extensions are open source and hosted on Github. Fork one and make your own

MODEL-DRIVEN DEVELOPMENT
Modeling data are stored in a very simple JSON format, so it can be used easily to generate custom codes with CLI (Command-Line Interface).

FAST MODELING
Supports many shorthands in Quick Edit to create elements and relationships at once such as sub-classes, supporting interfaces, etc.

DARK AND LIGHT THEMES
Support light and darks themes, so you can choose a theme more comfortable.

COMMAND PALETTE
Command Palette allows to search and execute commands in StarUML as well as installed extensions.

CODE GENERATION
Supports code generation for various programming languages including Java, C#, C++ and Python via open source extensions.

QUICK FIND
Quick Find allows to find models, views and diagrams and select the element quickly.

ASYNCHRONOUS MODEL VALIDATION
Many model validation rules are defined and checked asynchronously whenever you save or open your model files.

PUBLISH HTML DOCS
Easy to share models with other analysts, architects, and developers by just publishing HTML Docs.

PDF EXPORT FOR CLEAN PRINTING
Diagrams can be exported to PDF for clean printing with printing options like page layout and sizes.

MARKDOWN SUPPORT
Use markdown syntax to edit element's documentation with support of syntax highlighting and preview.

macOS 10.13 or higher

Windows 10 or higher

Ubuntu or Fedora