Compare software

Folder SizeWinDirStat
Freemium

Free to use, with a paid registered edition available.

 Free

Free and open source under the GPL 2.0.

Windows Windows
  • Bar and pie charts of disk usage
  • Works on network shares and NAS devices
  • Treemap makes one enormous file obvious at a glance
  • Finds duplicates by hash and compares logical against physical size
  • Windows only
  • Some functions tied to the paid registered edition
  • Windows only
  • The treemap is dense and takes a moment to learn to read
Downloadable app Downloadable app
Closed source Open source
License not stated License: GPL-2.0
No account needed No account needed
Works offline Works offline

Checked October 1, 2026

Checked September 21, 2026

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