WinDirStat is a free, open-source disk usage analysis tool for Windows. It scans a drive or folder and displays the results both as a sortable file-type list and as a treemap, a rectangle-based chart where larger rectangles represent larger files, colored by file extension. This makes it fast to spot which folders and file types are consuming the most disk space so you can clean them up.
How WinDirStat Helps You Reclaim Disk Space
Modern drives hold so many files that a plain folder listing rarely shows what is actually consuming space. WinDirStat's color-coded treemap turns a full disk scan into a picture where the largest rectangles are the largest files, so oversized folders and forgotten downloads become obvious at a glance instead of requiring a manual folder-by-folder search.
WinDirStat Features
- Treemap Visualization — a color-coded rectangle chart showing relative file and folder sizes at a glance.
- File Type Breakdown — a sortable list summarizing disk usage by file extension.
- Directory Tree View — browse scanned folders in a familiar tree layout alongside the treemap.
- Direct File Actions — open, explore to, or delete files straight from the scan results.
- Multi-Drive Scanning — analyze one or more drives, or specific folders, in a single scan.
- Open Source — source code is publicly available under an open-source license.
How to Install WinDirStat
- Open the official download page using the button on this page to get the genuine WinDirStat installer.
- Run the installer and follow the setup wizard prompts.
- Launch WinDirStat and choose the drive or folder you want to scan.
- Wait for the scan to finish while it builds the file list and treemap.
- Review the treemap and use the file list to find and clean up large files or folders.
Is WinDirStat really free?
Open Source. WinDirStat is free, open-source software with no paid tier.
How to download WinDirStat safely
Use the request button on this page and we will email you the current link for windirstat.net — the publisher's own website — so you receive the authentic build. We do not host, mirror, patch or repackage this software in any way.
Avoid third-party "download manager" sites offering WinDirStat. They commonly wrap the genuine installer in their own bundler, which is how adware and browser hijackers get onto a machine that the user believed was clean.
Alternatives to WinDirStat
Other free system utilities software worth comparing before you decide:
CCleaner
A system cleanup tool for removing temporary and junk files.
Virtual CloneDrive
Free tool for mounting ISO, BIN and CCD disc images as virtual drives.
Frequently asked questions
Is WinDirStat free?
Yes, WinDirStat is free and open source.
What does the treemap in WinDirStat show?
Each rectangle represents a file, sized by its disk usage and colored by file type, so large files stand out visually.
Can I delete files directly from WinDirStat?
Yes, you can delete, open or explore to a file straight from the scan results.
Does WinDirStat scan the whole computer or just one folder?
You can scan an entire drive, multiple drives, or a specific folder you choose.
Is WinDirStat available for Mac or Linux?
No, WinDirStat is a Windows application, though similar treemap tools exist for other platforms.
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