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K4DirStat vs WinDirStat: catalog facts
K4DirStat	WinDirStat
Free Free to use, with source code published on GitHub.	Free Free and open source under the GPL 2.0.
Linux	Windows
Shows directory sizes both as a list and as a treemap Works like a graphical version of du	Treemap makes one enormous file obvious at a glance Finds duplicates by hash and compares logical against physical size
Built on Qt 5 and KDE Frameworks 5, so it fits a KDE desktop best Documentation lives in a GitHub wiki rather than a dedicated site	Windows only The treemap is dense and takes a moment to learn to read
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.