WinDirStat 2.9.0

WinDirStat: Open-source disk usage visualizer for Windows

WinDirStat is a free, open-source utility for Microsoft Windows that analyzes disk usage and helps identify large files and folders through a visual, hierarchical presentation. The application pairs a full-tree scan with an interactive treemap and complementary lists, providing a rapid way to see how space is distributed across drives and directories and to take targeted actions from within the interface.

Three coordinated views for clear analysis

Scan results are displayed in three linked panes that speed diagnosis and navigation:

• Directory list: An Explorer-like tree sorted by file and subtree size so the largest items appear first.
• Treemap: A color-coded map in which each file is shown as a rectangle sized proportional to its disk footprint; nested rectangles convey directory relationships at a glance.
• Extension list: A legend and statistics pane grouping files by extension, with cumulative sizes and color associations used in the treemap for quick type identification.

Interactive treemap and file operations

The treemap serves as the application’s primary visual index. Hovering reveals file paths and sizes; selecting a rectangle highlights the corresponding entry in the directory list. From the UI it is possible to open files in Explorer, launch them with the default program, or delete items (including support for the Recycle Bin). Advanced users can configure custom cleanup commands and context actions to streamline post-scan tasks.

Scan configuration and practical usage

• Targeted scanning: Scans can be limited to specific drives or folders to focus analysis on areas of interest.
• Operational workflow: Scans produce a navigable dataset so subsequent browsing and selection are immediate; full-tree scans are comprehensive and should be run with an expectation of time proportional to dataset size.
• Lightweight footprint: The application is compact and designed to run on a variety of Windows installations.

Licensing, distribution, and source access

WinDirStat is distributed under the GNU General Public License version 2 (GPLv2). Source code, downloads and project information are maintained on the official site, allowing organizations and developers to review, modify, or redistribute the software consistent with the license.

Typical use cases

1. Quickly locating large media files, archives, or growth points that consume disk space.
2. Providing system administrators with a visual map for storage troubleshooting on client or server systems.
3. Giving power users a manual, file-level tool for targeted cleanup and file organization.

Limitations and workflow considerations

• No built-in automated cleanup scheduler; cleanup actions are manual and require user confirmation.
• Interface focuses on function over modern aesthetics; interpreting treemap layouts may require brief familiarization for first-time users.
• Large-volume scans can take significant time; scheduling scans during low-activity periods reduces disruption.