TreeSize is a disk space analyzer that scans drives, folders, and network shares, then shows exactly which subfolders and files are consuming storage so you can decide what to delete, archive, or move.
TreeSize is a disk space analyzer that answers a simple question with evidence: what is using all the storage? Point it at a drive, a folder, or a network share, and it walks the tree, showing the size of every subfolder including what is nested beneath it, with the largest items at the top. Results are interactive, so you can drill from a folder down to individual files, sort by size, date, or owner, and delete, move, or archive what you no longer need without leaving the window. Charts make the picture obvious at a glance, and the whole scan stays responsive because the tool reads folder structures in parallel and shows results while it is still working.
Housekeeping is the obvious use, but reporting is where the tool earns its keep on shared storage. Scan results can be saved as an index file and compared later against a fresh scan, which shows which folders actually grew since last month, and scheduled scans can warn when a threshold is crossed. Searches go beyond simple names: you can filter by file type, owner, age, or size, match long paths that other tools miss, hunt duplicates by checksum, and export the whole result set to Excel, PDF, or HTML. TreeSize finds the space and confirms what is safe to remove; Glary Utilities covers the other maintenance jobs on a machine.
The value of TreeSize is that it replaces guessing with a sorted list. Administrators get a defensible answer when a volume fills up, because the report names the folders responsible rather than the drive as a whole, and comparing two scans over time shows whether a growth problem is a one-off dump or a steady trend. On a personal machine it settles the familiar argument about what is eating the disk, usually pointing at caches, old downloads, duplicate copies of photos, or forgotten backup folders. Being able to act inside the same window matters more than it sounds: you find a 40 GB folder, check what is inside, and remove it without switching tools and losing your place. Saved index files let you work on a scan taken days ago, and exports turn the results into something a manager or a client can read. The tool is fast enough to use casually, which is why it tends to stay installed.
Key capabilities and highlights.
TreeSize shows the size of every folder including everything beneath it, and you can keep expanding until individual files are visible. Sorting by size, last access date, or owner turns a large directory into a ranked list of what is worth attention, and the largest files view skips straight to the worst offenders.
Scan results can be visualized as a treemap, a pie chart, or a bar chart, which makes an abstract directory hierarchy readable in one look. Charts help when you have to explain a storage problem to someone who will not read a folder listing, and they can be exported as images for a report.
Folder structures are read in parallel, with the number of threads chosen automatically, and results appear while the scan is still running so you can start investigating immediately. Local volumes can also be read through the file system's own index, which is what lets TreeSize finish very large drives in seconds rather than minutes.
Search works across drives, shares, and whole networks using criteria such as name patterns, size, age, owner, or file type, with wildcards and regular expressions supported. A filter limits the tree to what you are looking for, and file paths that exceed the older length limits are still found and processed correctly.
TreeSize can search for duplicate files and verify them with checksums so nothing is removed on the strength of a matching name alone. Where duplicates are genuine, it can replace them with hard links that point at a single copy of the data, recovering space without losing any of the file names you rely on.
A scan can be saved as an index file and reloaded later, so two points in time can be compared and the difference shown per folder. That makes it straightforward to prove where storage went, and scheduled scans can raise an alert when a folder passes a threshold you set.
Every scan in TreeSize can be exported with the columns and depth you choose, to a spreadsheet, a formatted PDF, an HTML page, a CSV file, the clipboard, or an email. The complete file list of a folder is available too, which is useful when the data has to be fed into another system.
Large, old, or temporary files can be selected as a group and then archived, copied, moved, or deleted, and batches of names can be renamed in one pass. On NTFS volumes the view also accounts for compression, hard links, alternate data streams, and permissions, so reported sizes reflect reality rather than a rough estimate.
Browse historical releases and previous builds.
Common questions about TreeSize.
It analyzes disk space. It scans a drive, folder, share, or cloud location and reports the size of each folder and file, so you can find what is filling the storage and decide what to delete, move, or archive. Exportable reports make the findings easy to share with someone else.
Yes. TreeSize can delete, move, copy, or archive files directly from the scan results, and it can also rename large batches of names at once. Because you are working from a sorted list of what is genuinely large, cleanup is usually much faster than browsing folders by hand.
It reads multiple folder branches in parallel and adjusts the number of threads automatically, and it can use the file system index on local volumes rather than walking every directory manually. Results are displayed while the scan continues, so you are not waiting for a progress bar to finish.
Yes. It searches for duplicates and can verify matches with checksums, so files are only treated as identical when their contents agree. On NTFS volumes it can also replace duplicates with hard links, keeping one physical copy of the data while all of the original file names still work.
Yes. Save a scan as an index file and compare it with a later one, and the difference is broken down folder by folder. That is the usual way to answer questions about a share that keeps filling up, and scheduled scans can alert you when a threshold is exceeded.
Scans can be exported to Excel, PDF, HTML, CSV, the clipboard, or an email, with configurable columns and export depth. A plain list of every file in a folder and its subfolders can also be produced when the data is going into a database or another tool.
Both individuals and IT teams. On a personal machine it settles the question of where the disk space went, while administrators use it on network shares, cloud storage, and drive images to produce the storage reports that justify cleanup or capacity planning, with results that can be scheduled and archived.
TreeSize is a disk space analyzer that scans drives, folders, and network shares, then shows exactly which subfolders and files are consuming storage so you can decide what to delete, archive, or move.
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