Tree Outliner

Tree Outliner: Free & Open Source Outlining Software for Windows

A free, open source outlining software for Windows to create hierarchical tree structures, plan projects and visualize concepts with a simple and clean interface.

What is Tree Outliner?

Tree Outliner is a free, open source outlining program for Windows that allows users to create hierarchical outlines and mind maps to organize thoughts, ideas, notes, and plans. Developed by Alexander Bessonov, Tree Outliner has a simple, intuitive interface that presents outlines in a traditional tree structure.

Key features of Tree Outliner include:

• Clean, distraction-free interface for focus on content creation
• Drag-and-drop support to easily rearrange topics and sub-topics
• Outline folding to toggle between high-level topics and granular details
• Support for checkboxes, icons, images, hyperlinks, and tags in nodes
• Summary view shows word count statistics for the entire outline
• Focus mode to isolate key branches for better readability
• Offline and portable usage - no installation needed

As an open source outliner, Tree Outliner is fully customizable - users can create new themes, icons, and add functionality via plugins. The portable app works offline and stores data locally in XML outlines. The simple, intuitive interface makes Tree Outliner easy to adopt for students, writers, project managers, and anyone who wants to structure information and plan projects efficiently.

Tree Outliner Features

Official Links