A sophisticated software modeler for agile and concise modeling

Stop using expensive and complex modeling tools. Software models should be simple, and easy to build with straightforward tools.

Download
v7.0.0
Screenshot

Trusted by the global leading companies

b1 Logo
b2 Logo
b3 Logo
b4 Logo
b5 Logo
b6 Logo
b7 Logo
b8 Logo
b9 Logo
b10 Logo
b11 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo
b12 Logo

Multiple modeling languages in a single project

You can use various modeling languages such as ERD, SysML, and BPMN, as well as UML, in a single project.

UML 2 Diagrams

Unified Modeling Language (UML) is a standardized modeling language used to visualize the design of a system. StarUML supports the most of the UML 2 diagrams, including class, package, composite structure, object, component, deployment, use case, sequence, communication, timing, interaction overview, statechart, activity, information flow and profile diagram.

uml example

Entity-Relationship Diagram

Entity Relationship Diagram (ERD) is used to visually represent the structure of a database, showing the relationships between entities and their attributes.

erd example

Data Flow Diagram

Data Flow Diagram (DFD) is used to represent the flow of data within a system, illustrating how data is processed by different components and how it moves between them.

dataflow example

Flowchart

Flowchart is a diagram that represents a process or workflow, using standardized symbols to depict different types of actions or steps in the process, making it easy to understand and communicate complex processes visually.

flowchart example

Mindmap

Mindmap is a diagram used to visually organize information, showing relationships among pieces of a whole, often used for brainstorming and organizing thoughts.

mindmap example

C4 Model

C4 Model is a framework for visualizing the architecture of software systems, focusing on the context, containers, components, and code levels of a system's architecture.

c4 example

SysML

PRO

SysML (Systems Modeling Language) is a general-purpose modeling language for systems engineering, providing a graphical notation to specify, analyze, design, and verify complex systems.

sysml example

BPMN

PRO

BPMN (Business Process Model and Notation) is a graphical representation for specifying business processes in a workflow, providing a standard way to visualize the steps in a business process.

bpmn example

UI Wireframe

PRO

UI Wireframe is a low-fidelity visual representation of a user interface, focusing on layout and functionality rather than design details, used to plan and communicate the structure of a web or mobile application.

Wireframe logo

Need a more focused wireframing tool? Try Frame0 now, a sleek Balsamiq-alternative. Learn more

wireframe example

AWS Architecture

PRO

AWS Architecture Diagram is a visual representation of the architecture of applications and services running on Amazon Web Services, helping to design, document, and communicate the structure of cloud-based systems.

aws example

GCP Architecture

PRO

GCP Architecture Diagram is a visual representation of the architecture of applications and services running on Google Cloud Platform, helping to design, document, and communicate the structure of cloud-based systems.

gcp example

Azure Architecture

PRO

Azure Architecture Diagram is a visual representation of the architecture of applications and services running on Microsoft Azure, helping to design, document, and communicate the structure of cloud-based systems.

azure example

Modern and convenient user experience

StarUML provides a modern and convenient user experience with its intuitive interface, light and dark themes, and tools for fast modeling. Designed to be user-friendly, making it easy for both beginners and experienced users to navigate and utilize its features effectively.

Hackable with JavaScript, develop your own extensions.

StarUML is designed to be hackable with JavaScript, allowing you to develop your own extensions and customize the tool to fit your specific needs. This feature empowers you to enhance the modeling experience by adding new functionalities or modifying existing ones.

AI integration via MCP server

StarUML supports AI integration via MCP server, allowing you to leverage AI capabilities for tasks such as code generation, diagram generation, and more. This feature enhances your modeling experience by providing intelligent suggestions and automation.

Instant diagram generation using Mermaid syntax

Create diagrams quickly and easily using Mermaid syntax. This feature allows you to write simple text descriptions that are converted into visual diagrams, making it perfect for rapid prototyping.

Wireframe logo
New Family Product

Frame0 — Design Wireframes in Minutes

Frame0 empowers you to create beautiful hand-drawn style wireframes with effortless speed, transforming your concepts into visual prototypes for modern applications — and with the help of an AI Agent, you can save even more time and effort.

All features for fast and robust modeling

Provides all the necessary features for software modeling through long-term communication with users.

Cross Platform

Works on any platform. Whether you're on Windows, macOS, or Linux, we've got you covered.

Auto Update

Get the latest features and bug fixes automatically without manual intervention.

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).

Code Generation

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

Asynchronous Model Validation

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

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.

Quick Find

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

Markdown Support

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

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.

Command Line Interface

With CLI (Command Line Interface), you can generate various artifacts (codes, docs, images) automatically.

Upgrade Your Software Architecture Today

Cut complexity, reduce tech debt, and get ready for your next big release. A well-structured architecture isn’t just cleaner code — it’s the difference between weeks of delays and delivering on time, every time.

AltStyle によって変換されたページ (->オリジナル) /