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SquirrelDiskWizTree
Free

Free and open source.

 Freemium

Free for personal use. Commercial use, or removing the Donate button, requires a paid…

Windows, macOS, Linux, Command line Windows
  • Sunburst and treemap views
  • Scans remote servers over SSH and cloud storage
  • Reads the NTFS master file table, so scans finish in seconds rather than minutes
  • Treemap view of the whole drive alongside a sorted file and folder list
  • Visual charts can be less precise than a plain sorted list
  • Closed source
  • The MFT trick only applies to NTFS; other file systems fall back to a normal scan
Downloadable app Downloadable app
Open source Closed source
License not stated License not stated
No account needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked September 20, 2026

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