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QDirStat vs K4DirStat: catalog facts
QDirStat	K4DirStat
Free Free and open source under the GPL version 2.	Free Free to use, with source code published on GitHub.
macOS, Linux	Linux
Treemap plus tree view of disk usage No KDE dependencies	Shows directory sizes both as a list and as a treemap Works like a graphical version of du
No Windows version Interface is dense for casual users	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
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
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.