TreeSize

Overview

TreeSize is a Windows desktop tool for seeing how files and folders consume storage. It is most compelling for users who need to investigate more than a local drive or turn scans into recurring reports. Its breadth is useful, but the edition matters: Free is restricted to private, non-commercial desktop use and cannot scan Windows Servers.

All editions run on-premise; JAM Software says data stays on the computer or site and is not shared with third parties. That suits people and organizations that prefer storage analysis to remain in their own environment.

Key features

Find what is using space

TreeSize scans files and folders across local drives, network shares, cloud storage, USB drives, SD cards, and external hard drives. Treemap views make relative space consumption visible, while file-type breakdowns help identify which kinds of content account for it. External and network targets extend its usefulness beyond a single PC, though Windows Server scanning requires Professional rather than Free.

Reports and repeatable scans

Depending on edition, results can be exported to PDF, Excel, CSV, HTML, and SQLite. Professional adds custom PDF, Excel, and HTML exports alongside command-line parameters, task scheduling, scheduled scans, and automated reporting. That is a meaningful step up for IT staff who need repeatable reporting, but more than a casual user may need.

Cleanup tools

TreeSize can delete, move, bulk-rename, and archive files, and includes duplicate finding and deduplication. These actions let users go from identifying storage pressure to addressing it in the same tool. Users should still choose actions carefully: the product’s ability to modify files makes it more than a read-only visualizer.

Integrations and privacy

The comparison includes SharePoint, Google Drive, Amazon S3, Microsoft Azure, Outlook, Linux via SSH, and mobile MTP/WebDAV. The range can help teams examine storage beyond Windows disks, although support depends on edition. JAM Software says the product has been used for more than 25 years by millions of users worldwide.

Pricing

TreeSize uses a freemium model. TreeSize Free costs nothing and is limited to private, non-commercial use on Windows Desktop; it cannot be used on Windows Servers. That is a sensible no-cost starting point for personal scans, but not an option for business use or server work.

TreeSize Personal is billed annually at 20.40 € per user and includes a 14-day free trial. It adds a largest-files filter, duplicate-file search and deduplication, and comparison of disk usage over time. Advanced users, freelancers, and smaller businesses who need those tools can choose it, but it does not replace Professional’s server scanning and automation capabilities.

TreeSize Professional is billed annually from 40.80 € per user, with a 14-day free trial. It combines disk-space analysis and duplicate and large-file finding with command-line and task-scheduler options and custom PDF, Excel, and HTML exports. It is the more appropriate tier for IT professionals managing storage in-house, especially when Windows Server scans or recurring reports matter. Certain Professional plans offer unlimited user licenses.

The Consultant License is billed annually at 240.00 € per user and has a 14-day free trial. It covers use across multiple clients, portable use, and reusable reporting and automation, making it the targeted choice for consultants and service providers rather than a single organization. Personal also has a perpetual model; no price is stated for that option.

SpaceObServer Enterprise is billed annually at 504.00 € per instance and offers a 45-day free trial. Intended for businesses managing large or distributed networks, it is a separate enterprise choice rather than a per-user TreeSize license. Contact JAM Software for licensing advice when choosing between these tiers.

Platforms

The desktop editions run on Windows Desktop. TreeSize can inspect varied storage targets, but those targets do not change its listed desktop platform. Professional supports Windows Server scanning; Free does not.

Who it's for

TreeSize Free fits private Windows users who want a no-cost look at local storage. Personal suits advanced individual users, freelancers, and smaller businesses that need larger-file and duplicate analysis or usage comparisons. Professional is better for IT teams that need server scans, exports, and scheduled reporting. Consultants working across clients have a dedicated license, while organizations managing large or distributed networks can consider SpaceObServer Enterprise.

It is less suitable for anyone seeking a desktop edition outside Windows, or a free option for commercial or Windows Server use.

Pros and cons

• Pros: Broad storage targets, including network and cloud storage, make it useful beyond local-drive cleanup.
• Pros: Treemaps, file-type breakdowns, and multiple export formats offer different ways to interpret and share scan results.
• Pros: Professional’s scheduling and automated reporting support repeatable IT work, while Consultant licensing covers multiple clients.
• Pros: On-premise operation and the stated no-third-party-sharing policy suit privacy-conscious users.
• Cons: Free is for private, non-commercial Windows desktop use and cannot scan Windows Servers, so business users must move to a paid edition.
• Cons: Capabilities vary by edition, so buyers must match their needs for server scanning, integrations, exports, and automation to the appropriate tier.
• Cons: The listed desktop platform is Windows, limiting its fit for users who need a native desktop app on another operating system.

Alternatives

WizTree is worth considering if macOS support matters alongside Windows; it is freemium with a free plan, and its $25 a month Individual Supporter Code is a perpetual personal-use license whose purchase supports development.

Filelight is a free option for Linux or Windows users who want an alternative without a paid tier.

WinDirStat is another free Windows option for readers who do not need TreeSize’s paid editions.

FolderSizes may suit personal and home-network users who prefer a perpetual license: its Personal Edition costs $30, paid once, is unavailable to organizations, and includes lower-priority support.

SizeTrend is a Windows freemium alternative whose free tier keeps core local-analysis features free, including local drive and folder scans and an overview with cleanup and storage recommendations.

eDirStat is a free alternative for readers who need Linux or macOS as well as Windows; its Mac App Store plan is for macOS 12.0 or later and Apple M1 chips or later.

Disk Usage Analyzer is a free option for Linux users.

Disk Analyzer Pro is a freemium alternative for macOS or Windows users; its free personal edition includes local-drive usage reports, unwanted-file and folder deletion, and duplicate-file reports.

Browse more options in our Disk Space Analyzers directory.

Verdict

TreeSize is a strong choice for Windows users who need to understand storage across varied targets and, in Professional, turn that analysis into scheduled reports or Windows Server scans. Its on-premise operation and range of editions add useful flexibility. Look elsewhere if you need a desktop app outside Windows, or if your work requires commercial or server use without a paid edition.