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WinDirStat

Free#2 of 104 in Disk Space AnalyzersDisk Cleanup Software

WinDirStat: A classic Windows analyzer with treemaps, file breakdowns, duplicate detection, and CSV export. Ranked #2 of 104 in Disk Space Analyzers by our editors (9.1/10); pricing: Free plan; best for classic free Windows disk analysis.

9.1/10Editor score

Visit WinDirStat

WinDirStat9.1 Visit WinDirStat

At a glance

Editor score
9.1 / 10
Pricing
Free plan
Best for
Classic free Windows disk analysis
Free plan
Yes
Paid from
Free
Desktop platforms
Windows
Founded
2003
Facts checked
23 Sep 2026

Where it wins
- Interactive treemap makes large storage areas easy to spot
- Duplicate detection supports content- or hash-based matching
- CSV export, search, and filtering support follow-up analysis
Where it doesn't
- Windows-only availability limits cross-platform use
- Scanning is focused on local drives and individual folders
- Cleanup workflows are centered on files and scan results

Our verdict on WinDirStat

WinDirStat is a free, open-source disk usage analyzer and cleanup tool for Microsoft Windows. It is designed for people who need to understand where storage is being used across local drives or individual folders. The interface combines sortable directory and file listings with file-extension statistics, largest-file views, and an interactive proportional treemap. Search and filtering help narrow scan results, while duplicate-file detection can compare files by content or hash. Windows Explorer integration supports its place in a Windows file-management workflow.

Its main strength is the depth of its storage inspection in a focused desktop tool. The treemap provides a visual view of relative file sizes, while sortable listings and file-type breakdowns offer a more precise route to investigation. Duplicate detection adds a practical way to identify repeated content, and users can save or export scan results, including CSV workflows. These features make WinDirStat suitable for users who prefer detailed local analysis over a broader storage-management suite.

WinDirStat is most appropriate for Windows users who want a free, open-source way to inspect files and folders without a paid plan structure. Its scope is narrower than a cross-platform analyzer: it supports Windows, and its documented scanning focus is local drives and individual folders. Choose it when treemaps, file-type statistics, largest-file views, duplicate detection, and exportable results match the task. Choose an alternative when support beyond Windows or a wider storage-management scope is central to the decision.

Your product? Our editors can test WinDirStat in depth and publish a review, labelled as paid · from $149/mo →

WinDirStat pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on windirstat.net

WinDirStat fact sheet

Free plan	Yes
Paid from	Free
Desktop platforms	Windows
Treemap view	Yes
Application sizes	Not verified
File-type breakdown	Yes
External drive scans	Not verified
Exportable reports	Yes
Scan scope	Files_folders
Deployment	Desktop
Platforms	Windows
Support	Community
Built for	Solo, Small business (editorial estimate)
Pricing	Free plan
Website	windirstat.net
Facts checked	23 Sep 2026

Alternatives to WinDirStat

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WinDirStat vs the competition

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Also Ranked In

WinDirStat is ranked in 2 of our directories.

#7Disk Cleanup Software23 tools ranked

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used WinDirStat for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

WinDirStat is listed in our Disk Space Analyzers directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update