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K4DirStat vs ncdu: catalog facts
K4DirStat	ncdu
Free Free to use, with source code published on GitHub.	Free Free and open source under an MIT-style licence.
Linux	macOS, Linux, Command line
Shows directory sizes both as a list and as a treemap Works like a graphical version of du	Works over SSH on a server with no graphical environment Parallel scanning with -t8 is much faster on large trees
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 build Colours are off by default because they were not legible in all terminals
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
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.