TreeSize

TreeSize analyzes files and folders to show how storage is used on Windows desktop systems. It can scan local drives, network shares, cloud storage, USB drives, SD cards, and external hard drives, with treemap views and file-type breakdowns. Reports can be exported to PDF, Excel, CSV, HTML, or SQLite depending on the edition. Professional adds command-line options, task scheduling, scheduled scans, and automated reporting, and it can scan Windows servers. TreeSize Free is for private, non-commercial use on Windows desktop and cannot be used on Windows Servers. Personal and Professional offer 14-day trials; SpaceObServer Enterprise offers 45 days. The desktop editions run on Windows and operate on-premise. JAM Software says data stays on the computer or site and is not shared with third parties. Personal is billed annually at 20.40 € per user, and Professional starts at 40.80 € per user. Other options include a Consultant license for use across multiple clients and SpaceObServer Enterprise for businesses managing large or distributed networks.

TreeSize provides storage analysis with edition-dependent reporting and automation options. Its Free edition has a non-commercial desktop restriction, while server scanning is available in Professional.

TreeSize suits Windows users who want to inspect disk usage across local, removable, network, or cloud storage. Professional is aimed at IT professionals managing storage, while the Consultant license covers work across multiple clients.

Overview

TreeSize is a Windows desktop tool for locating what is consuming storage across drives, folders, and connected storage services. It is best suited to users who need more than a basic disk scan, especially IT teams and consultants who need repeatable reports. Its broad scanning and cleanup toolkit is useful, but commercial and server use require choosing the right edition.

All editions run on-premise, and JAM Software says data stays on the computer or site rather than being shared with third parties. That is a practical advantage for organizations that want to analyze storage without sending scan data to an external service. For a broader category comparison, see our Disk Space Analyzers list.

Key features

Scan and understand storage

TreeSize analyzes files and folders across local drives, network shares, cloud storage, USB drives, SD cards, and external hard drives. Treemap views make large space users visually prominent, while file-type breakdowns help show whether particular kinds of content are driving usage. This combination is more informative than a folder list alone when narrowing down what to review.

The integration comparison includes SharePoint, Google Drive, Amazon S3, Microsoft Azure, Outlook, Linux via SSH, and mobile MTP/WebDAV. That range makes TreeSize relevant to mixed storage environments, though desktop editions still run on Windows Desktop.

Reports, automation, and cleanup

Scan results can be exported to PDF, Excel, CSV, HTML, and SQLite, depending on edition. Professional adds custom PDF, Excel, and HTML exports along with command-line parameters, task scheduling, scheduled scans, and automated reporting. Those features suit administrators who need recurring visibility; they are unnecessary overhead for someone who only wants to inspect a personal drive occasionally.

TreeSize also supports deleting, moving, bulk renaming, archiving, duplicate finding, and deduplication. These actions can turn analysis into cleanup in the same tool, but they make edition choice important: Personal includes duplicate search and deduplication, while Professional adds a broader operational and reporting role.

Pricing

TreeSize uses a freemium model. TreeSize Free costs nothing and is limited to private, non-commercial Windows desktop use; it cannot be used on Windows Servers. That is a meaningful restriction for business users, despite the no-cost entry point.

TreeSize Personal is billed annually at 20.40 € per user, with a 14-day free trial. It targets advanced users, smaller businesses, and freelancers, adding a top-largest-files filter, duplicate-file search and deduplication, and comparison of disk usage over time. A perpetual model is also available, though no price is given for it.

TreeSize Professional is billed annually from 40.80 € per user and also offers a 14-day trial. It is aimed at IT professionals managing storage in-house, with disk-space analysis, duplicate and large-file finding, command-line and task-scheduler options, and custom PDF, Excel, and HTML exports. It is the appropriate step up for server scanning and recurring reporting; unlimited user licenses are available with certain Professional plans.

The Consultant License is billed annually at 240.00 € per user, with a 14-day trial. Its multiple-client use, portable operation, and reusable reporting and automation are geared to IT consultants and service providers rather than a single organization.

SpaceObServer Enterprise is billed annually at 504.00 € per instance and offers a 45-day trial. It is positioned for businesses managing large or distributed networks. For readers comparing these options, the key trade-off is scope: Free is non-commercial and desktop-only, Personal focuses on individual analysis, Professional adds operational tools and server scanning, and the consultant and enterprise options address multi-client or larger-network needs.

Platforms

TreeSize desktop editions run on Windows Desktop. Professional supports scanning Windows servers, while TreeSize Free cannot be used on Windows Servers. The ability to scan network and cloud storage targets broadens what Windows users can inspect without changing the desktop platform requirement.

Who it's for

TreeSize Free fits private users who need a no-cost way to inspect storage on a Windows desktop. Personal is a stronger fit for advanced individuals, freelancers, and smaller businesses that want largest-file filtering, duplicate handling, and usage comparisons. Professional suits IT staff who manage storage in-house and need server scanning, custom reports, or scheduled work. Consultants benefit from multi-client and portable use; Enterprise is aimed at organizations overseeing large or distributed networks.

It is not the right choice for a Mac-first or Linux-desktop user, nor is Free suitable for commercial use or Windows Server scanning. Users who only need an occasional scan may not need the paid editions' automation and licensing scope.

Pros and cons

• Pros: Scans a wide range of local, removable, network, and cloud targets, which helps users investigate storage beyond a single internal drive.
• Pros: Treemaps, file-type breakdowns, exports, and cleanup actions support both diagnosis and follow-up work.
• Pros: On-premise operation and the stated no-third-party-sharing policy suit organizations that want scan data kept on their own computer or site.
• Cons: The free edition is restricted to private, non-commercial Windows desktop use and cannot scan Windows Servers, ruling it out for many workplace needs.
• Cons: Capabilities are divided across several editions, so users needing automation, server scanning, consultant use, or large-network coverage must select a paid tier rather than assume Free covers it.
• Cons: Windows is the desktop platform, limiting its fit for people who need a native Mac or Linux desktop analyzer.

Alternatives

WizTree is worth considering for readers who want a freemium disk analyzer that runs on macOS as well as Windows; its Individual Supporter Code is $25 a month, and the perpetual personal-use code does not expire.

FolderSizes is another Windows freemium option. Its Personal Edition license costs $30, paid once for personal and home-network use, with a perpetual license, but it is unavailable to organizations and includes lower-priority support.

SizeTrend, Disk Analyzer Pro, StorageRadar, Drive Atlas, Disk Auditor, and DiskAtlas are also alternatives to compare.

Verdict

TreeSize is a strong choice for Windows users who need flexible storage scans and, in paid editions, reporting or automation that can scale from individual work to IT operations. Its on-premise approach and broad target coverage are compelling reasons to choose it. Look elsewhere if you need a non-Windows desktop tool, or choose a paid edition from the outset if the work is commercial or requires server scanning.