TreeSize Professional's Main Features

See the size of all folders including their subfolders and break it down to the file level.
Visualize scan results like disk usage in the pie or bar chart.
Treemap charts visualize hierarchies and sizes of subfolders in the selected directory.
Detailed view with single files and much additional information (e.g. date of last access).
Statistics about file types and file owners for every branch.
Filter the file system tree on the left by a certain user or file type.
See a list of the largest files.
Distribution of occupied disk space by file age.
Scan SharePoint servers, Amazon S3, WebDAV, drive images, Outlook mailboxes, Azure Blob Storage as well as Linux machines via SSH.
Disk Space Management on smartphones and mobile devices.

Flexible and fast search for files and folders included.
Easy to access basic search.
Fully customizable file search with many supported search criteria.
Files with long paths are reliably found.
Search multiple drives, entire servers and even your complete network neighborhood.
Search for user permissions in your Active Directory.
Export search results in various formats.
TreeSize offers a powerful duplicate file search, optionally with MD5 or SHA256 checksums.
TreeSize can also deduplicate duplicate files using NTFS hardlinks.

Archive, copy, move, or delete files, for instance large, old or temporary files or files with common characteristics.
Rename multiple files at once to replace unwanted characters in a large number of file names for example.
Identify redundant files and and clean your PC up.

Export all collected data to various formats such as Excel, a nicely formatted PDF, HTML, XML, text/CSV file, clipboard, or as email.
Many configuration options e.g. for the export depth.
Export a list of all files in the scanned folder and all its subfolders, for example for use in a database.

Save the collected data to an XML file and load it again later.
See which folders have grown and understand storage losses: compare a saved XML file to a current scan, TreeSize displays the difference between the two scans.
Use and create Windows snapshots to find out, where the disk space has grown.

The displayed columns and their order can be configured separately for each view and export ("Details" tab, Excel export, PDF-file, ...)
Include and exclude certain files or folders in your scans.

Browse the results during scanning.
Scan and view several folders at the same time.
Automatic optimization of the number of threads that are used for a parallel scan.

File based NTFS compression.
Hardlinks and Alternate Data Streams (ADS) are displayed and taken into account.
File paths longer than 255 characters will be found and processed correctly.
NTFS permissions can be displayed and exported.

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Break down hard disk space usage right down to file level: an Explorer-like overview shows the size of all subfolders.
Use the treemap chart to visualize disk space usage at a glance.
Scan network shares and cloud drives.
Visualization of folder sizes via a colored bar in the background facilitates easy orientation.
TreeSize Free displays all files and folders compressed with the formats LZX and XPress as well as NTFS compression rates. Whole folder branches can be compressed via NTFS.
Access your disk space manager at any time: TreeSize Free can be started from the context menu of folders or drives.
Start TreeSize Free with administrator rights and scan files you cannot access without opening them. Data protection guaranteed.

TreeSize Free scans smartphones and mobile devices via MTP (Media Transfer Protocol) and WebDAV.

Filter scan results according to different criteria and according to patterns you create. Patterns can be matched as wildcards, regular expressions, or whole name.
Switch between simple view and column view at any time.
The column view offers detailed information about files and folders: size, occupied disk space, number of files, last acces, owner etc.

The handy utility occupies minimal disk space and can be run from USB sticks without a hitch.

TreeSize Free uses the Master File Table (MFT) for scans of local NTFS drives and thus guarantees ultra-fast scans.
Without MFT access and on network drives TreeSize Free scans the file system with two parallel threads (up to 32 in TreeSize Professional).