A zoomable map of your drives for Windows. Every file and folder is a box sized by the space it uses. Filter in plain words, fly into folders, and clean up right from the map.
Free and open source under the MIT license. Windows 10 and 11, 64-bit. No account, no telemetry, nothing installed unless you choose the installer. The map below is the real interface drawn in your browser with sample data.
Try it: hover the map for the status line, click a box to select it, and use the controls to switch scene, style and colors. Names are sample data.
The whole drive is one map. The biggest things are the biggest boxes, and you fly into them.
Run as administrator and SpaceSharp reads the NTFS file table directly instead of walking every folder, so a drive with a million files is mapped in a few seconds. Folders, other file systems and normal runs use a parallel folder walk.
Double-click a folder and the map zooms until it fills the window. Wheel to zoom around the cursor, drag to pan, Backspace to go up. Small files gather into one box until you zoom in close enough to see them.
Type videos over 500MB older than 1 year or *.iso and everything else dims. Six quick filters cover the usual cleanups. Select every match with one click, then delete them together.
Ctrl+I on a file, folder or selection: the size with its share of the folder and of the drive, the five largest things anywhere inside, donuts by file type and by age, and a plain-language callout when one thing holds most of the space or nothing has changed in years. Breadcrumbs and rows zoom the map. Copy it as text.
Each top-level folder gets one hue, and everything inside keeps that hue, a step lighter per level. Or color by depth, or by file type with a legend. Six map styles and eight palettes, including a color-blind safe one.
Right-click for Open, Show in Explorer, Properties, copy, filter to this file type, select the whole folder, or move to the Recycle Bin. The map updates and the freed space shows immediately.
A side panel lists every drive with usage bars, and the largest files, folders and file types of the current scan. Click a drive to scan it.
Follows Windows or picks a side. A Treemap page in Settings tunes density, layout bias, padding, borders and the label font; five label sizes, outlined labels for busy palettes, and your own palettes as JSON files. S cycles styles, K cycles colors.
Every scan is saved. The start screen lists your recent ones, one click reopens yesterday's map, and a Change color mode shows what grew, shrank or appeared since. Old saves clean themselves up after a period you choose.
Every word in the app can be translated; Norwegian bokmål ships alongside English and follows Windows by default. Adding a language is one file, and the test suite checks nothing is missing.
SpaceSharp.exe D:\ scans straight away, a saved scan opens from the command line, and an optional "Scan with SpaceSharp" entry goes into Explorer's right-click menu for folders and drives, for your user only.
They all read the same disk. The difference is what you can do once you see it.
| Feature | SpaceSharp | WizTree | WinDirStat | SpaceMonger |
|---|---|---|---|---|
| Reads the NTFS file table for fast scans | Yes, as administrator | Yes | No | No |
| Zoomable map you fly into | Yes | No | No | Yes |
| Filter in plain words | Yes | Name search | No | No |
| Hierarchy shown by color | Yes | By type | By type | By depth |
| Inspect with shares, type and age breakdown | Yes | Basic | Basic | No |
| Delete from the map | Recycle Bin | Yes | Yes | Yes |
| Dark mode | Yes | No | No | No |
| Saves scans and shows what changed | Yes | Export only | No | No |
| Languages | English, Norwegian | Many | Many | English |
| Open source | MIT | No | GPL | Abandoned |
| Price | Free | Free for home use | Free | Was paid |
As of October 2026, from each product's own documentation. Corrections welcome on GitHub.
One file if you want nothing installed. An installer if you want updates to arrive on their own.
Choose the folder, install for you or for everyone, and get updates automatically. This is the one most people want.
Download the installerUnzip anywhere and run. Still updates itself. Good for USB sticks and other people's PCs.
Download the ZIPOne file, no install, no admin, no updates. The simplest thing that works.
Download the exeEvery release with notes and checksums is on GitHub Releases.
The short answers. The README on GitHub has the long ones.
No telemetry, no accounts, no network use except the update check, which only asks GitHub for the latest release and only when you installed with the installer. The source is public and the release assets are built from it.
Reading the NTFS file table means opening the drive itself rather than its folders, and Windows only allows that for administrators. When you scan a drive, SpaceSharp asks once through the normal Windows prompt, a small elevated helper reads the table and hands the map back to the window you already have, and the helper exits. Say no and the normal scan runs instead; everything else works the same.
Files go to the Recycle Bin, never straight to deletion, and the map updates to show the space as free. Protected system folders are read-only unless you run as administrator, and even then the app never touches files by itself.
The map counts file contents. Explorer's used space also includes the file system's own structures, shadow copies and space reserved by Windows. Hard-linked data such as WinSxS is counted once here, which Explorer's folder sizes do not do.
SpaceSharp is about the map: zooming, styles, filtering and cleaning up in place. Like WizTree it reads the NTFS file table when run as administrator. WinDirStat is the classic and has not changed much. Use whichever fits; the table above lists the differences.
In your profile's local app data, one file per drive plus the previous one for comparison. Settings › Scanning sets how long they are kept (a week to forever, 3 months by default), deletes them all in one click, and can stop the last scan from reopening at startup.
Yes. Settings › Språk lists every language that has a translation; it follows Windows unless you choose one. Translations are plain resource files in the repository, so adding another language takes an afternoon, not a release.
Windows 10 or 11, 64-bit. The portable exe and the installer both carry their own .NET runtime, so nothing else needs installing. Around 60 MB on disk.