WinDirStat Alternatives for Windows and Mac

First, WinDirStat Is Not the App You Remember

For most of its life, WinDirStat was a classic that stopped moving. It drew a good treemap, but scans were single-threaded and slow, and the project went roughly 19 years without a release. That is the version most people have in mind when they search for an alternative.

In October 2024 that changed. WinDirStat 2.x is a rewrite: it is multithreaded, version 2.5 (January 2026) added direct NTFS Master File Table scanning, and it now has a duplicates view alongside the treemap, file list and extensions list. The latest release is 2.9.0, from September 2026. It is still free and open source under GPLv2, and you can get it as an installer, a portable build, from the Microsoft Store, or through winget.

Why People Still Look for Something Else

A revived WinDirStat covers a lot, but it is still a specific kind of tool: a Windows treemap. People move on for a handful of concrete reasons:

• They read a sunburst more easily than a treemap. Rings that follow the folder hierarchy are easier for some people to compare than nested rectangles.
• They are developers. The biggest reclaimable folders on a dev machine are build caches spread across dozens of projects, and a general treemap shows them one at a time.
• They keep files in OneDrive or Dropbox and want those folders mapped too, including files that are cloud-only.
• They also use a Mac. WinDirStat has no macOS version.
• They want the fastest scanner, full stop.

The Windows Alternatives

WizTree

WizTree, from Antibody Software, is the tool people mean when they talk about scan speed. It reads the NTFS Master File Table directly, which requires running as administrator, and gives you a treemap, a folder tree and a list of the largest files. It is free for personal use. Commercial use needs a Supporter Code, starting at $25 for an individual, with business tiers above that; a code covers versions released within one year. It is closed source. If speed is your main complaint, WizTree is a straightforward answer.

TreeSize

TreeSize, from JAM Software, leads with a sortable folder table and adds pie, bar and treemap charts. TreeSize Free is limited to personal, non-commercial use and also reads the MFT on local NTFS drives. The free edition leaves out duplicate search, the top-largest-files filter, exports, history comparison and cloud scanning. Those live in the paid editions: Personal at €20.40 per user per year and Professional from €41 per user per year, with perpetual licenses also offered. TreeSize is the natural choice if you manage file servers or need reports, which is where its enterprise features matter.

SpaceSniffer

SpaceSniffer, from Uderzo Software, is freeware supported by donations. It draws a treemap you can zoom and drill into, filters by file type, size and age, and runs as a portable app with no installer. It is closed source. If you want a treemap you can carry on a USB stick, it does the job well.

LumaDisk

LumaDisk shows the whole drive as an interactive sunburst or a treemap, one click apart, and draws the chart while the scan is still running. On NTFS drives, an optional Fast Scan reads the Master File Table after one administrator prompt per session. Click a wedge to zoom in and follow the breadcrumb back out.

The parts a treemap tool does not cover are what set it apart. The build-cache radar finds and groups node_modules, Rust target, .next, .gradle and other caches that rebuild themselves, and lists only those. The duplicate finder pre-ticks which copy to keep, and one copy of each group always stays. The Unused tab lists files of 100 MB or more that have not been opened in six months, one year or two years. OneDrive, Dropbox and iCloud Drive are mapped, cloud-only files included.

It is a native app built in Rust with GPUI, the GPU-accelerated stack behind the Zed editor, and it runs on Windows 10 or later on both x86-64 and ARM64. It costs a one-time $6.89 in the Microsoft Store, after a 7-day trial of everything; scanning and the sunburst stay free after the trial. Reclaiming deletes permanently rather than using the Recycle Bin, with a 10-second undo, and system folders can never be queued. More detail on the LumaDisk home page.

Side by Side

WinDirStat for Mac?

There is no Mac version of WinDirStat. If you want the same kind of view on macOS, you have four realistic options:

• GrandPerspective is the closest in spirit: a free, open source (GPL) treemap. It needs macOS 14 or later, with an older 3.7.2 release for macOS 11 to 13. It is free from SourceForge, or $2.99 for the same app on the Mac App Store.
• WizTreeMac is WizTree's official Mac version, released as 1.00 in September 2026. It runs on macOS 12 or later, is free for personal use, and a Supporter Code covers both platforms. On the Mac it cannot read an MFT, so it uses multithreaded directory enumeration instead. Our WizTree for Mac guide covers it in detail.
• DaisyDisk is the classic Mac sunburst, $9.99 one-time. It has no Windows version.
• LumaDisk runs on macOS 12 or later on Apple Silicon, with the same sunburst, build-cache radar and duplicate finder as on Windows. A Mac license covers up to five Macs.

For a fuller comparison of the sunburst-style options on macOS, see our DaisyDisk alternatives for Mac. Going the other way, if you liked DaisyDisk and want that view on a PC, read DaisyDisk for Windows.

Which Should You Pick?

• You liked WinDirStat and just want it free and current: install WinDirStat 2.x. It is maintained, reads the MFT and finds duplicates. You may not need anything else.
• You want the fastest possible scan for personal use: WizTree.
• You need reports, exports or server scanning at work: a paid TreeSize edition.
• You want a portable treemap with no installer: SpaceSniffer.
• You prefer a sunburst, write code, keep files in the cloud, or also use a Mac: LumaDisk.
• You are on a Mac and want a free treemap: GrandPerspective, or WizTreeMac if you already know WizTree.

If you are not after a tool so much as a quick way to find what is eating your drive, our guide to finding large files on Windows starts with what Windows can already do on its own.