Want to Know Where Your Disk Space Has Gone?

Get TreeSize Free! Even in the times of cheap terabytes a final truth remains: sooner or later every hard disk will near capacity or gone. We have the solution.

TreeSize Free Startscreen
Efficient Disk Space Reporting
Scan your volumes in seconds and see the size of all folders including all subfolders and break it down to file level.
Quickly Clean Up Your Disks
With the integrated Windows Explorer context menu and the usual keyboard shortcuts you can quickly get rid of unwanted stuff.
Stunning visualization
See the distribution of the used disk space at a glance with our customizable treemap chart.

Visual Tour

Easily find large folders or subfolders in the Windows Explorer-like tree view.

The hierarchical treemap chart in 2D shows you which file types are found in which folders. It will also visualize the size of each folder for easy disk space management.

You prefer a more three-dimensional view? Simply switch to the 3D treemap chart!

If your eyes react sensitively to brightness, the Dark Mode offers a welcome alternative.  You can access the proven functions as usual via a user-friendly interface.

A touch optimized interface for your comfort (requires Windows 8 or higher).

Different Versions for Different Requirements

Disk space management with TreeSize Free is intuitive, easy and free - but TreeSize Personal and
TreeSize Professional offer additional features.

What is Your Solution?
TreeSize Free

Filters scan results according to different criteria


Breaks down scan results according to owner, file type, 100 largest files, etc.


Versatile file search with duplicate finder and deduplication


Export to Excel, HTML and Email


Automation support and command line options



I love this program. It always works well, and it does exactly what I need it to do. Helps me keep my computer very clean.

Willy Korp, Korp Consulting, Inc. / Korp Technology Services

I just downloaded TreeSize Free and am most impressed with how much you have built into the free version of your software. It is clearly a well engineered and carefully thought out product that will be very useful for finding clutter on my hard drive. It contains far more value than I expected, and I compliment you on a product well done.

Charles E. Dial, Software Developer

I was using Treesize to manage the space on my drive after having installed the Android devkit, which resulted in my system downloading about half-a-dozen versions of the SDK, along with about six thousand version of Java!! Absolute bloomin' chaos.

Thanks for Treesize. I haven't had to use it for about a decade, but it's good to know it's still around, and works as wonderfully well as it every did.

A life saver!!

Jayenkai, Game Developer on AGameAWeek.com

4.5 out of 5 stars: Treesize users rated the tools meeting of requirements (96% user satisfaction) and its ease of use (96%) as the tool’s two best features.

G2 Crowd, business solution review platform

Maximize Your Data's Potential

Having trouble keeping track of your data? Let us bring structure and unlock its full potential.

Explore our innovative data management consulting services today and transform your data into actionable insights.

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Get More With the Feature-Rich Professional Edition


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Various charts and statistics: Get even more insight on your disk usage

Get detailed statistics on file types and file owners. A Top 100 list shows the largest files at a glance. Compare with previous states and see the size increases. Additional bar and pie charts give more insight.

Analyze disk usage in detail


Export all reports and charts

Export all collected data, statistics and charts into various formats. Create a stunning PDF report or export to an Excel document for further processing or calculations.

Various export formats

Customizable File Search

Find and manage files

The TreeSize File Search allows you to search for files using various search criteria and perform versatile operations like move, archive, copy or rename on them.

Search without limits

More Information and Documents