If your hard drive is feeling sluggish or mysteriously full, WinDirStat remains one of the best free tools to find out why and version 2.6.2, released this week, keeps the classic utility in fine form.
WinDirStat (Windows Directory Statistics) is a free, open-source disk usage analyzer for Windows that has been a staple in every power user's toolkit since its first release in 2003. Rather than burying you in file lists, it visualizes your entire drive as a colorful treemap: every file is a colored rectangle, sized proportionally to how much space it occupies. Large space hogs jump out at a glance.
The app combines three views in a single window: a sortable directory tree, an extension type list, and the interactive treemap. Click any block in the treemap and the directory tree highlights the exact file or folder it represents. It is entirely free with no ads, no upsells, and no telemetry.
What's new in 2.6.2
Version 2.6.2 is the third release in the 2.6.x series, arriving just two weeks after 2.6.0 (May 17) and ten days after 2.6.1 (May 22). The rapid cadence signals active bug-hunting rather than new feature work — the 2.6 branch is a stabilization cycle focused on hardening the substantial additions that landed in 2.5.0 earlier this year.
The specific patch notes for 2.6.2 mention improved scan performance, icon handling, UI behavior, numeric precision, security, translations, and rendering reliability, especially for offline files, command-line use, Simplified Chinese users, and low-color-depth Remote Desktop sessions.
What the 2.5.0 → 2.6.x line brought to the table
If you haven't updated since 2.2.x or earlier, the cumulative improvements since 2.5.0 are significant:
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Scanning improvements: A new direct NTFS MFT scanning option dramatically speeds up full-drive scans by reading the Master File Table directly rather than walking the directory tree file by file. Hardlink tracking was also added, so files with multiple directory entries are counted correctly instead of inflating your totals.
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Dark mode: WinDirStat now respects Windows dark mode, including the treemap background and all UI panels.
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Search within scan results: You can now search the scanned directory tree interactively, and auto-search directly from the Extensions list — useful when you know the file type but not where it lives.
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File operations expanded: The ability to move files was added alongside the existing delete option, and you can now compute and display SHA/MD5 hashes for individual files directly in the interface. Duplicate files identified by hash can be exported to a CSV.
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Progress dialogs: Long-running operations (large drives, deep trees, duplicate scans) now show proper progress dialogs instead of leaving the window unresponsive.
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Elevation prompting: WinDirStat detects when a folder requires admin rights and offers to re-launch elevated automatically, rather than silently showing zero bytes for protected directories.
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DISM integration and new cleanup shortcuts: The built-in cleanup menu gained a DISM analyze option and a shortcut to optimise virtual hard disk (VHDX) files — handy for users running Hyper-V or WSL with large virtual disks.
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Command-line scanning: You can now pass target directories as command-line arguments, making it practical to script or shortcut WinDirStat scans for specific folders.
Download
WinDirStat 2.6.2 is available from the official WinDirStat website. You can also track it for automatic update notifications through the UpdateStar client, which has logged nearly 1,500 update checks for WinDirStat in the past month alone, a sign of how widely it is still relied upon.
For a comparison of alternatives if WinDirStat does not fit your workflow, UpdateStar also maintains a WinDirStat alternatives page.
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