TreeSize Free
FreeA free Windows tool that shows which folders and files use the most disk space.
About TreeSize Free
TreeSize Free scans a drive or folder and displays how much space each subfolder and file takes, sorted so the biggest items are easy to find. The publisher describes it as the tool that tells you where your disk space has gone.
Results appear in a tree view that can be expanded and sorted, and the program integrates with the Windows Explorer context menu so you can scan any folder directly. It is a straightforward way to find large old downloads, forgotten backups or bloated application data.
TreeSize Free suits home users and administrators who need a quick answer to why a disk is full. It is the free edition of a product line from JAM Software, and the company also sells paid TreeSize editions with additional reporting and features.
The free version costs nothing to download and use. Deleting files you do not recognise can break software, so review what you remove.
Run it as administrator to include system folders in the totals. Consider the paid editions only if you need reports or network scanning.
Version history
1 release tracked- Bug fixes and performance improvements
Frequently asked
Is TreeSize Free free?
Yes. The Free edition costs nothing. JAM Software sells paid editions with more features.
Does it need an account?
No.
Which platforms does it support?
Windows.
Where does the download link go?
Directly to jam-software.com or the official app store for your platform. PlanetSofts never rehosts installers or adds wrappers, and these links were last verified Oct 6, 2026.