TreeSize review
Windows disk space analyzer that shows where storage is going and helps clean it up.
By Noahlast updated pricing verified
TreeSize screenshots & video
TreeSize in 20 seconds
Best for: IT admins and sysadmins who need to find and clean up large files and duplicates on Windows file servers and network shares, with scheduled scans and exportable audit reports.
Pricing: Free for personal use; TreeSize Personal from $25.20/user/year and TreeSize Professional from $49.20/user/year, both billed annually.
- TreeSize is a Windows-only disk space analyzer made by JAM Software, on the market for more than 25 years.
- TreeSize Free costs $0 and is limited to personal, non-commercial use; it cannot be used on Windows Server.
- TreeSize Personal starts at $25.20 per user per year (annual billing) and adds duplicate file search and largest-file filtering.
- TreeSize Professional starts at $49.20 per user per year (annual billing) and adds command-line/scheduler automation, network share scanning, and PDF/Excel/HTML export.
- All TreeSize editions run entirely on-premise, so scanned data never leaves the user's machine, which the vendor ties to GDPR compliance (servers located in Germany).
- TreeSize has earned a G2 'Users Love Us' badge with an average rating of 4.0 stars or higher.
Limitations: Windows only; no native macOS or Linux client.; Free tier is restricted to personal, non-commercial use and blocked on Windows Server.; Advanced automation (scheduling, scripting, network scanning) is limited to the Professional tier, not Personal.; Per-user/per-year licensing can add up for larger teams unless an unlimited-license plan is purchased.
Top alternatives: WinDirStat, WizTree, SpaceSniffer, SpaceObServer — full list
What is TreeSize?
TreeSize is a Windows desktop application that scans drives, folders, network shares, and cloud storage to show exactly what is consuming disk space, using folder trees, pie charts, bar charts, and treemap visualizations. It is built by JAM Software, a German company, and has been sold for more than 25 years. Beyond visualization, it offers duplicate file detection, bulk file operations (delete, move, rename), scheduled scans, and exportable reports in PDF, Excel, HTML, and CSV.
TreeSize is a disk space analyzer for Windows made by JAM Software, used to visualize folder and file sizes, find duplicates and large files, and clean up storage on local drives, network shares, and cloud-synced folders. It ships in three tiers: TreeSize Free for personal non-commercial use, TreeSize Personal for freelancers and power users, and TreeSize Professional for IT admins who need scheduling, scripting, and reporting. All editions run fully on-premise, so scanned data never leaves the machine.
Standout feature: Fully on-premise scanning with no cloud dependency, combined with treemap-based visual breakdown of storage down to individual files, plus command-line and task-scheduler automation in the Professional edition.
Biggest weakness: TreeSize is Windows-only, so macOS and Linux users have no native version; the free edition is restricted to personal, non-commercial use and can't be used on Windows Server, forcing any business or server use into a paid Personal or Professional license.
TreeSize: pros and cons
Pros
- Free tier available for personal, non-commercial use
- Detailed visualizations (folder tree, pie, bar, treemap) down to file level
- Duplicate file finder and bulk file operations (delete, move, rename)
- Scheduling, command-line options, and PDF/Excel/HTML/CSV export in the Professional tier
- Fully on-premise; no data leaves the local machine, which helps with GDPR compliance
Cons
- Windows only, no macOS or Linux client
- Free edition can't be used on Windows Server or for commercial purposes
- Per-user/per-year licensing model can get expensive for larger IT teams unless on an unlimited-license plan
- Advanced automation and network-share scanning require the Professional tier, not Personal
TreeSize pricing
Free tier · paid from $25.20/yr · verified from the vendor's pricing page
| Plan | Price | Notes |
|---|---|---|
| TreeSize Free | Free | Home/personal non-commercial use; one-click storage visualization, treemap chart, PDF reports |
| TreeSize Personal | $25.20/yr | Per user per year, annual billing; power users and freelancers; adds largest-file filters, duplicate finder, usage-over-time comparison; perpetual license also available |
| TreeSize Professional | $49.20/yr | Per user per year, annual billing, starting price; for sysadmins and IT teams; adds command-line/task scheduler options, custom PDF/Excel/HTML exports, network drive and UNC path scanning; unlimited user licenses available on certain plans |
What reviewers say
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