WinDirStat

Overview

WinDirStat is a Windows utility for analyzing disk use and cleaning up storage. It is a strong fit for people who want to investigate space across drives, folders, network shares, or MTP devices without paying for the software. Its broad set of views and reporting tools is useful for deeper investigations, though users seeking a simpler single-view utility or another operating system should look elsewhere.

Key features

WinDirStat can present scan results as a file tree, extension list, treemap, flame graph, or sunburst, and compare logical and physical sizes. This variety helps users move from an overview to particular files and types, and can make differing size measurements easier to interpret. It is more analytical depth than a quick folder check requires, but suits users diagnosing where storage has gone.

Scans cover drives, folders, network shares, and MTP devices. Elevated scanning enables accelerated scans on local NTFS drives. Search by name, size, type, or owner narrows results, and comparing file-content hashes can help identify duplicates. Together, these features support targeted cleanup rather than relying solely on visual inspection.

Users can save and reopen scan snapshots, export CSV or JSON reports, and automate scans, which makes repeat checks and sharing results practical. The program can also scan and export permission entries, but does not calculate a particular user's effective access across group memberships; it is therefore not a complete access-audit tool.

Storage Analytics estimates monthly savings for configurable storage tiers based on file sizes and modification ages. It helps assess potential savings, but does not move files or configure a storage service. Cleanup tools are included, and WinDirStat attempts to recover deleted files from local NTFS, exFAT, and FAT drives; that recovery capability is not a reason to treat it as a dedicated backup or recovery solution.

Pricing

WinDirStat is free software for personal and commercial use, distributed under the GNU GPL version 3 or later. Its free plan is the product itself, not a trial, so there is no paid tier to weigh against reduced features or a trial deadline. The download page offers Windows x64, x86, and ARM64 installers, portable ZIP and 7z archives, and a Microsoft Store package.

Platforms

WinDirStat is developed for and tested on Windows 7, 8, 8.1, 10, 11, and Windows Server 2008 R2 through 2025; other versions are unsupported. Its Windows focus is a firm limitation for households or teams working across operating systems. Users needing Linux or macOS support should choose a platform-compatible alternative.

Who it's for

WinDirStat suits Windows users who need to locate large files, understand file-type usage, compare storage measurements, or produce repeatable reports. Its search, snapshots, exports, and scan automation can also serve support staff handling recurring storage investigations. People who only need a quick, uncomplicated visual summary may find the multiple views and analysis tools unnecessary, while administrators needing effective-access calculations should use a tool built for that audit task.

Pros and cons

• Pros: Multiple visual views and logical-versus-physical size comparison help explain storage use from different angles.
• Pros: Broad scan targets, flexible search, and duplicate comparison support focused investigations and cleanup.
• Pros: Snapshots, CSV and JSON exports, and scan automation make recurring analysis more useful.
• Pros: Free use for personal or commercial settings avoids a license cost.
• Cons: Windows-only support rules it out for users who need a native Linux or macOS utility.
• Cons: Permission exports do not calculate effective access across group memberships, limiting their value for access audits.
• Cons: Storage Analytics estimates savings but does not move files or configure storage tiers.

Alternatives

TreeSize is worth considering for Windows users who want a freemium alternative with a free plan and free trial; its listed Free plan is for private, non-commercial use. For Linux users, Filelight is a free, open-source option that also supports Windows. WizTree is another freemium choice for Windows and macOS users; its listed Individual Supporter Code costs $25 a month, is a perpetual personal-use license, and does not expire.

Mac users can consider OmniDiskSweeper, a free macOS utility. Linux users can also consider Disk Usage Analyzer, a free Linux desktop tool for disk-usage scanning. FolderSizes offers a freemium Windows option, with a Personal Edition license at $30, paid once for personal and home-network use; it is unavailable to organizations and includes lower-priority support. Disk Analyzer Pro is a freemium option for macOS and Windows whose free personal edition includes local-drive usage reports, file and folder deletion, and duplicate-file reports. Windows users who want local scans alongside cleanup and storage recommendations can consider SizeTrend, whose core local-analysis features remain free.

For more options, browse the disk space analyzers directory.

Verdict

Choose WinDirStat if you use Windows and want a free, capable way to investigate storage with multiple views, search, exports, and cleanup tools. Its strongest case is the breadth of analysis without a personal or commercial license cost. Look elsewhere if you need native support outside Windows or a report that determines a user's effective access through group memberships.