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pdu (parallel-disk-usage) vs ncdu: catalog facts
pdu (parallel-disk-usage)	ncdu
Free Free and open source with no paid tier.	Free Free and open source under an MIT-style licence.
Command line	macOS, Linux, Command line
Parallel scanning for quick results on large directory trees Visual size chart directly in the terminal	Works over SSH on a server with no graphical environment Parallel scanning with -t8 is much faster on large trees
Terminal only, with no graphical interface Reports usage but does not delete or move files	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.