Alternatives to TreeSize Free
Shows which folders are eating a Windows drive, ranked largest first, without a scan that takes all afternoon. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
TreeSize Free
Shows which folders are eating a Windows drive, ranked largest first, without a scan that takes all afternoon.
Replacements
Listings that take over the same core job as TreeSize Free.
WizTree
Finds what is eating a Windows disk in seconds by reading the NTFS master file table directly.
WizTree also reads the NTFS master file table and adds a treemap, duplicate search and CSV export for free, but commercial use needs a paid licence.
WinDirStat
Draws your whole drive as a treemap, so a single 40 GB file is a huge rectangle you cannot miss.
WinDirStat is open source and shows a treemap with duplicate finding by hash, trading TreeSize's sorted tree for a denser picture.
SpaceSniffer
Shows disk usage as a treemap you click into, so the biggest folders and files are immediately obvious.
SpaceSniffer is closed source freeware showing a live-updating clickable treemap, offered only as a 64-bit portable executable.
Filelight
Shows disk usage as concentric rings you can click into.
Filelight is open source for Windows and Linux, displaying usage as concentric rings and scanning network locations, though it pulls in KDE libraries.
gdu
Find large directories with a terminal disk-usage analyzer.
gdu is an MIT-licensed terminal analyzer with parallel scans for Windows, macOS and Linux, replacing the graphical tree with a text interface.
dua-cli
Explore disk usage and remove unwanted files in the terminal.
dua-cli is an open source terminal tool for Windows, macOS and Linux that browses disk usage interactively and can delete files.
Also worth comparing
These listings name TreeSize Free as their own alternative, so the relationship runs both ways.
DiskSavvy
A Windows disk space analyzer that classifies files on local disks, network shares and NAS devices.
TreeSize Free reads the NTFS master file table for quick scans and is free for commercial use, but reports, exports and duplicate search need a paid edition.
FolderSizes
A Windows disk space analyzer that reports folder sizes and finds large, old and duplicate files.
TreeSize Free reads the NTFS master file table for fast scans and is free for commercial use, but reports, exports and duplicate search need a paid edition.
Similar software
Related functionality, not a direct replacement.
Czkawka
Finds duplicate files, similar images, similar videos and empty folders, and does it very fast.
DaisyDisk
Interactive sunburst map of disk usage for macOS.
GrandPerspective
Treemap view of disk usage on macOS.
ncdu
A disk usage analyser with a text interface, built for finding what is filling a remote server you can only reach over SSH.
diskus
Measure the total size of a directory from the command line.
Microsoft PC Manager
Microsoft's free Windows app for cleaning up storage, managing pop-ups and running quick system checkups.
