WinDirStat Download for Windows

Software Overview

WinDirStat is a free open source disk space analyzer for Windows that displays storage usage in a colorful treemap visualization alongside a sortable directory tree view. It scans the entire drive or selected folders and presents a clear picture of which files and directories are consuming the most space.

Originally based on the Linux tool KDirStat, WinDirStat has been a trusted free disk analysis utility for Windows users for many years and continues to receive updates under its open source GPL license.

What Does WinDirStat Do?

WinDirStat scans selected drives or folders and breaks down disk usage by directory, file, and file extension. It presents results in three panels — a directory tree sorted by size, a file extension list with color coding, and a full treemap where each colored rectangle represents a file scaled to its size on disk.

Users can click any block in the treemap to instantly locate the corresponding file or folder, making it straightforward to identify and remove storage hogs.

Is WinDirStat Free to Download?

Yes. WinDirStat is completely free and open source, licensed under the GNU General Public License. There is no paid version, no subscription, and no feature restrictions. All tools and options are available to every user at no cost.

The source code is publicly available on GitHub for users who want to review or contribute to the project.

Is WinDirStat Safe to Use?

WinDirStat is safe to use and has been a trusted open source tool for many years. Because it is open source, its code is publicly reviewable, which adds an extra layer of transparency compared to closed-source utilities.

It does not delete or modify files automatically. All file removal is manually initiated by the user, and standard Windows deletion behavior including Recycle Bin support applies.

How Fast Does WinDirStat Scan?

WinDirStat scans drives by walking the file system directory by directory, which is thorough but slower than tools that use direct Master File Table access. Scanning a large drive can take several minutes depending on the number of files and drive speed.

For users who need faster scans on large drives, WizTree offers MFT-based scanning that completes in seconds. WinDirStat’s strength lies in its detailed visual output and open source transparency rather than raw scan speed.

WinDirStat vs WizTree

WinDirStat and WizTree both offer treemap visualization but differ in speed and method. WinDirStat uses a full directory walk which is slower but works on all file systems including FAT32 and network drives. WizTree reads the NTFS Master File Table directly, completing scans significantly faster on NTFS drives.

WinDirStat remains the preferred choice for users who value open source software, need to scan non-NTFS drives, or want a classic and well-established tool with a long track record.

Does WinDirStat Work on Windows 11?

Yes. WinDirStat is compatible with Windows 10 and Windows 11. The latest version also supports Windows Server environments, making it useful for IT administrators managing server storage alongside personal computers.

Both 32-bit and 64-bit versions are available to match the target system.

Is WinDirStat Still Good in 2026?

WinDirStat remains a reliable and capable disk space analyzer in 2026. While newer tools offer faster scan speeds, WinDirStat’s combination of open source licensing, detailed visualization, and zero cost keeps it relevant for users who prefer transparent software with no commercial strings attached.

Its active development community continues to release updates, with version 2.5 bringing improvements to performance and interface compared to earlier releases.

Key Features of WinDirStat

Colorful Treemap Visualization

Displays all files as colored rectangles scaled to their size on disk, giving an instant visual overview of what is occupying the most storage space.

Directory Tree View

Shows all folders and files sorted by size in a hierarchical list, allowing users to drill down into specific directories to find large items.

File Extension List

Provides a color-coded breakdown of disk usage by file type so users can see which categories of files — videos, system files, downloads — are using the most space.

Cleanup Assistant

Offers built-in options to open files, delete them, or send them to the Recycle Bin directly from the treemap or directory view.

Selective Scan

Allows users to scan a specific drive, folder, or multiple drives rather than requiring a full system scan every time.

Open Source GPL License

Fully open source with publicly available code, making it auditable and trustworthy for security-conscious users and IT professionals.

Windows Server Support

Compatible with Windows Server editions, making it suitable for administrators who need to analyze storage across server environments.

Extension Legend

Displays a color legend linking each file type to its corresponding color in the treemap for easy identification during analysis.

WinDirStat for Windows Users

WinDirStat supports Windows 10, Windows 11, and Windows Server. It works on NTFS, FAT32, and other file systems, making it compatible with a wider range of drives and storage configurations than tools limited to NTFS only.

It is suitable for home users cleaning personal storage, IT professionals managing office or server systems, and anyone who prefers an open source approach to disk analysis.

Why Choose WinDirStat?

WinDirStat offers a proven, completely free, and fully transparent approach to disk space analysis. Its open source nature, detailed visual output, and broad file system compatibility make it a dependable choice for users who want to understand and manage their storage without relying on commercial software. For those who prioritize open source tools and detailed visual clarity over raw scan speed, WinDirStat remains one of the best free disk analyzers available for Windows in 2026.