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K4DirStat vs QDirStat: catalog facts
K4DirStat	QDirStat
Free Free to use, with source code published on GitHub.	Free Free and open source under the GPL version 2.
Linux	macOS, Linux
Shows directory sizes both as a list and as a treemap Works like a graphical version of du	Treemap plus tree view of disk usage No KDE dependencies
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	No Windows version Interface is dense for casual users
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 23, 2026

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