The Powerful Graphical Manager For Your Storage Systems

  • Analyze Data On Any Storage System
  • Visualize The Usage of Storage Capacities
  • Organize And Clean Up Storage Systems Efficiently

File & Disk Space Management At Its Best

As multifunctional as a Swiss Army knife is the market-leading file and disk space manager TreeSize. The software analyses all stored data across your systems and visualizes the results in meaningful charts and statistics. Find out where your disk space has gone at a glance and take immediate action if necessary. For this purpose, TreeSize provides you with a wide range of file management options. With our all-round performer you have a multi-tool in your hand to organize your storage systems and to get your valuable storage space back.

The world-renowned solution is optimized for handling large file volumes and complements Windows Explorer. A high degree of automation is enabled by command line parameters and management of scans scheduling directly in a comfortable, graphical user interface.

Use the original and benefit from our experience – TreeSize manages disk space since 1997!

Cross-system Disk Space Management
Scan Windows, WebDAV, and SharePoint servers, any mobile devices, Amazon S3, and Unix/Linux systems via SSH! See the size of all folders including subfolders and break it down to the file level.
Highly Customizable File Search
Search for files and folders using a number of different criteria. Archive, copy or move the found results! Check for duplicate files using a powerful duplicate file search, optionally with MD5 or SHA256 checksums and easily deduplicate files using hardlinks.
Versatile Exporting and Reporting
Export scan and search results to many formats such as Excel, XML, HTML, PDF, text/CSV file, clipboard, or email. You can also easily automate the exports using command line options.

Visual Tour

The main window offers a clear and easy to use interface which is split into the file system tree on the left and the details view on the right. An optional chart facilitates easy overview. 

The pie chart of TreeSize allows you to overview the most important data on disk space usage at one glance.

TreeSize main window tree map

The treemap chart is a hierarchical chart visualizing the size of all subfolders (not only the direct child folder) of a selected directory branch. The tiles can be viewed in 2D (pictured) and 3D mode.

The Details view presents you a lot of valuable information about the disk usage like the folder size, the disk space wasted by the file system structure, the last access date, the NTFS compression rate and the owner.

TreeSize enables you to sort files by file age. Intervals can be configured for "creation date" , "last change" and "last access".

The top 100 panel provides an overview about the 100 largest files found during the last scan.

The TreeSize file search helps you to find obsolete and very large files. The particular search types can be configured in detail and certain files or folders can be easily excluded from the search results - for instance recently changed files.

Configure TreeSize: Many aspects of TreeSize can be configured in the options dialog, e.g. the view, the export of data or startup options.

Find Out What TreeSize Has To Offer

Different Versions for Different Requirements

TreeSize Icon

TreeSize Personal

Access to network drives in home networks*
Export to Excel, PDF and Mail
Support for Windows Server
Automation support via a command line
TreeSize Icon

TreeSize Professional

Access to all network drives
Export to Excel, PDF and Mail
Support for Windows Server
Automation support via a command line

* Typical home network: the computer running TreeSize Personal is not part of a Windows domain and the remote system is not a Windows Server operating system.

What's Your TreeSize Story?

TreeSize turns 25 years old. Happy Birthday!

Without its loyal community, TreeSize would be just one of many programs that can manage storage space. But thanks to thousands of dedicated users around the world, TreeSize has evolved into a practical all-rounder for a wide variety of use cases.

But enough about us: what's your TreeSize story? Let's take part in our survey!

Compatibility & Supported Languages

TreeSize is compatible with all Windows systems currently supported by Microsoft and supports numerous languages in addition to English and German.


Thank you for the ongoing support for TreeSize. Just yesterday I was able to demonstrate that a certain action of just manually updating a set of excel files would be a near impossible task since I was able to show them in less than 10 min that they had over 20.000 excels hidden in their networkshare.

The simplicity and speed is just awsome!

Manfred De Jong, Manfred De Jong Consultancy

Very glad I bought the software yesterday! I've seen my software company's support staff use Treesize. I'm personally always pretty hesitant about purchasing software. But after trying out the trial... MAN! It's night and day difference when compared to Windirstat.

The speed difference alone is incredible!

Thibault Molleman, Molleman De Coster BVBA

I've just tried a scan on a large bucket and it reported the results far quicker than I can get the results directly from the aws console!! Great work!! Amazing.

I remain super impressed with your work, thanks loads.

Charlie Daffarn, Omnicom Group IT | paige

TreeSize Professional from JAM Software is the most powerful program I’ve seen for analyzing how disk space is being used. My local hard drive, which is partitioned as a main C: partition and a supplementary D: partition, has almost 450,000 files using 665GB. The scan completed in 37 seconds!

Read the complete review.

Chris Taylor, President and System Administrator, Ottawa PC Users' Group

Disk Space Management With Database Support

In disk space management, one size does not fit all. With SpaceObServer we offer you the ideal hard disk space manager for Windows, if you need a tool which stores file system information in a database.

Find out now whether TreeSize or SpaceObServer is more suitable for YOUR demands!

TreeSize Icon

TreeSize Professional

Report on directory growth / availability of historical data
Report and filter by NTFS permissions
Scan Windows / NAS shares, Amazon S3 and Unix systems via SSH
Support for Exchange Server Storage
Ability to apply live filters
SpaceObServer Product Icon

SpaceObServer Enterprise Edition

Report on directory growth / availability of historical data
Report and filter by NTFS permissions
Scan Windows / NAS shares, Amazon S3 and Unix systems via SSH
Support for Exchange Server Storage
Ability to apply live filters

More Information and Documents

Important and valuable information about TreeSize, be it a successful application in practice, maintenance questions or technical specifications.