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TreeDrawExpress is a software tool designed to create and render tree diagrams and other hierarchical visualizations from structured data. It is used in data analysis, education, biology, and software engineering to visualize decision trees, phylogenetic trees, family trees, organizational charts, and related structures. The tool emphasizes clean layouts, customizable styling, and programmatic access to generate diagrams from datasets.

Features and capabilities include multiple layout algorithms such as hierarchical top-down, radial, and circular layouts; automatic edge routing and label management; extensive node and edge styling options; support for annotations, tooltips, and interactive exploration. Input formats include JSON, CSV, YAML, Newick (phylogenies), and GraphML, while exports cover SVG, PNG, PDF, and interactive HTML. The system offers scripting interfaces in Python and JavaScript, along with a plugin architecture to extend functionality. Deployments span desktop applications, browser-based versions, and server-side instances, enabling both GUI-driven workflows and automated diagram generation within data pipelines. It supports integration with common data science stacks and visualization tools via APIs and SDKs.

Licensing and development: TreeDrawExpress is distributed in multiple editions, including open-source community builds and commercial variants with additional features and support options. The project emphasizes accessibility for educators, researchers, and developers by providing clear documentation and examples.