Our verdict: TreeSize Free answers "where did my disk space go?" with a clear, sortable folder tree. It is easy to read and works entirely offline. The free edition is for private, non-commercial use only, and advanced search, reports and server support require a paid edition.
About TreeSize Free
TreeSize is made by JAM Software in Germany and has existed for more than 25 years. The free edition scans local drives, USB sticks and SD cards and lists folders sorted by size, so the largest ones are at the top.
You can drill down to individual files, see charts of folder usage and delete files directly from the interface. All editions run locally, and JAM states that no scan data leaves your PC. A fully customizable file search and scheduled scans with comparison reports are part of the paid TreeSize Professional.
What it does well
- Folder tree by size. Explorer-like view with the largest folders at the top.
- Charts. Visual overview of how space is split between folders.
- External drives. Detects USB drives, SD cards and external disks automatically.
- Delete in place. Remove files directly from the result list.
- Portable version. A portable ZIP is available alongside the installer.
Who it is for
Good fit
Home users who need to find out quickly what is filling up a drive.
Look elsewhere
Business use, Windows Server or anyone who needs scheduled scans and advanced search without paying.
Pros and cons
Pros
- Clear sortable folder tree
- Works offline, no data sent
- Installer and portable versions
- No ads
Cons
- Free edition is for private, non-commercial use only
- Not usable on Windows Server
- Many features are reserved for paid editions
How to install TreeSize Free
Download the installer from jam-software.com. After scanning, sort by Size and work down the list. Run TreeSize as administrator if you want it to include system folders you otherwise cannot read.
Questions about TreeSize Free
Is TreeSize Free free?
Yes, for private, non-commercial use on desktop Windows. Business users need TreeSize Personal or Professional.
Can I use TreeSize Free at work?
No. JAM Software licenses the free edition for non-commercial use only and it does not run on Windows Server.
Does TreeSize send my data anywhere?
No. JAM Software says all TreeSize editions work locally and no data leaves your PC.
