Diskflag / Guides / WinDirStat alternatives
WinDirStat alternatives
The main WinDirStat alternatives for Windows 11 are WizTree (faster), TreeSize (Explorer-style tree, pro features), SpaceSniffer (portable treemap), Diskflag (tells you what's safe to delete) and Windows' built-in Storage settings. WinDirStat itself is actively updated: version 2.9.3 shipped on Oct 11, 2026, with dark mode and NTFS MFT scanning since 2.5.0. If you want a free, open source tool and don't need delete recommendations, staying with WinDirStat is the right call.
I build Diskflag, so I have a stake here. I've kept this page to what each vendor publishes, and I list Diskflag's drawbacks alongside the others. For a wider comparison, see the best disk space analyzers for Windows.
Which WinDirStat alternative should you pick?
| Tool | Price | View type | Safe-to-delete flags | Open source | Notes |
|---|---|---|---|---|---|
| WinDirStat | Free | Treemap, sunburst, flame graph | No automatic recommendations, as far as documented | Yes (GPL v3+) | 2.9.3, Oct 2026. Windows 7 through 11. MFT scan when elevated. |
| WizTree | Free for personal use. Commercial from $25 | Tree view plus treemap | No documented cleanup recommendations | No | Reads the MFT as administrator. 4.33, Sep 2026. |
| TreeSize | Free for home use. Personal $25.20 per year. Professional from $49 per year | Explorer-style tree, pie, bar and treemap charts | Not documented | No | Professional adds bulk actions and duplicate search. |
| SpaceSniffer | Free (freeware, donations welcome) | Zoomable treemap | Not documented | No | Portable. Filters by type, size and age. |
| Diskflag | $8 once | Treemap, three folder levels deep | Yes: pink, pink stripes, dashed outline | No | Windows 10 and 11. Moves items to the Recycle Bin only. |
| Windows Storage settings | Included with Windows | Usage by category | Cleanup recommendations | No | Settings > System > Storage. Categories only, no folder map. |
Prices and versions are from each vendor's site, checked October 24, 2026. WizTree commercial tiers: Individual $25, Micro $100, Small $200, Medium $350, Large $500.
Is WinDirStat safe?
Yes. WinDirStat is open source under the GPL, so its code is public and anyone can read it. Download it from the official project page on GitHub, not from a mirror or a search ad.
Like any disk tool, it can delete files if you tell it to. It shows sizes and offers cleanup commands you run yourself. It does not decide what is safe to remove for you.
Does WinDirStat work on Windows 11?
Yes. The project lists support for Windows 7 through 11. The latest release is 2.9.3, from the releases page (Oct 11, 2026).
Old guides call it dated. That is no longer fair. Version 2.5.0 added dark mode and direct NTFS MFT scanning when run elevated, according to the changelog. It also shows sunbursts and flame graphs besides the treemap, plus file-type statistics and largest-file lists.
When should you stay with WinDirStat?
Stay if you want a free tool with public source code and a long track record. It also covers duplicate detection and custom cleanup commands. You get size information and decide for yourself what to delete.
Switch if you want the tool to say which folders are safe to clear, or if you prefer a different layout. The sections below cover each option.
WizTree: the faster WinDirStat alternative
Best for: people who want the quickest scan and are fine deciding what to delete themselves.
WizTree reads the NTFS Master File Table directly when run as administrator. It shows a tree view plus a treemap, largest files, a duplicate finder (by name, size and date, not content) and CSV export. The latest version is 4.33, from Sep 16, 2026.
Pros
- Very fast scans via the MFT
- Free for personal use
- CSV export
Cons
- Proprietary
- Commercial use needs a Supporter Code, from $25
- No documented cleanup recommendations
Source: diskanalyzer.com and its license page. For a head-to-head, read WizTree vs WinDirStat.
TreeSize: the Explorer-style alternative
Best for: people who think in folders and want a tree like File Explorer's, with paid features for work use.
TreeSize adds pie, bar and treemap charts to an Explorer-style tree. TreeSize Free costs $0 for home, non-commercial use (latest 4.8.1, Nov 20, 2025). TreeSize Personal is $25.20 per user per year, and a perpetual license is also available. TreeSize Professional starts at $49 per user per year and adds bulk actions and duplicate or large-file search. There is a 14-day trial.
Pros
- Explorer-style tree plus three chart types
- Free edition for home use
- Professional adds bulk actions
Cons
- Commercial use needs a paid license
- Paid tiers are priced per user per year
- No documented safe-to-delete recommendations
Source: JAM Software TreeSize and the TreeSize Free changelog.
SpaceSniffer: the portable treemap
Best for: a free treemap you can run without installing, with filters for type, size and age.
SpaceSniffer is freeware and portable, and the author welcomes donations. It shows a zoomable treemap. The current version listed is 2.2.0.27, with no release date published.
Pros
- Free and portable
- Zoomable treemap
- Filters by type, size and age
Cons
- Release date of the current version is not published
- No documented safe-to-delete recommendations
Source: the SpaceSniffer page.
Diskflag: the alternative that tells you what's safe to delete
Best for: people whose drive is full and who want to know what to clear, not only what is large.
Diskflag is a disk space analyzer for Windows 10 and 11. It maps a whole drive as a treemap and marks items in three ways. Pink means safe to clear. Pink stripes mean worth reviewing. A dashed outline means managed by Windows, such as the page file, the hibernation file and restore points. It flags Windows system files, temp files, developer caches, Docker and WSL disks, project build folders, app and browser caches, AI models, games, large videos and likely duplicates.
For each flagged item it gives the fix: move it to the Recycle Bin, copy a cleanup command such as npm cache clean --force, or open the right Windows setting. It only moves things to the Recycle Bin, after you confirm, and it refuses Windows system folders, Program Files and your main profile folders. It runs offline with no account and no telemetry.
On my own 1 TB C: drive with 4 GB free, the first scan flagged 84 GB as safe to clear and 457 GB as worth reviewing. A full scan of that drive (4.9 million files) took about 3.5 minutes on my PC.
Pros
- Flags what is safe to clear, with the exact fix
- Only moves items to the Recycle Bin, after you confirm
- Offline, no account, no telemetry
- Counts size on disk, so compressed and OneDrive cloud-only files are correct
Cons
- Slower than WizTree, because it does not read the MFT
- Paid: $8 once, where WinDirStat, SpaceSniffer and personal-use WizTree are free
- Windows only
- Not code-signed yet, so Windows SmartScreen shows a notice the first time you run it
- No scheduled or automatic cleanup
See pricing for the refund terms. For what the pink tiles mean in practice, read what's safe to delete on Windows 11.
Want the map and the answer in one place?Diskflag maps your whole drive, flags what's safe to clear in pink, and only ever moves things to the Recycle Bin. $8, once, with a 14-day refund.
See how it worksWindows Storage settings: the built-in option
Best for: a quick first look with nothing to install.
Open Settings > System > Storage. Windows shows usage by category and Cleanup recommendations for temporary files, large or unused files, files synced to the cloud and unused apps. Storage Sense is off by default and cleans the system drive only. Disk Cleanup (cleanmgr) still exists.
Pros
- Already on your PC
- Gives cleanup recommendations
- Storage Sense can clear temp files automatically
Cons
- Shows categories, not a map of every folder
- Storage Sense is off by default
- Storage Sense cleans the system drive only
Source: Microsoft on freeing up drive space and Storage Sense. The steps are in how to free up space on your C drive.
What's a good alternative to WizTree?
If you like WizTree's tree plus treemap but want a different tool, try WinDirStat, which also scans the MFT when run elevated, or TreeSize Free for an Explorer-style tree. If you want flags for what to clear, use Diskflag. If raw scan speed is the reason you use WizTree, it is the right tool and I don't claim Diskflag is faster.
What's a good SpaceSniffer alternative?
WinDirStat is the closest free match: it is also free and shows a treemap, and it adds sunbursts and flame graphs. WizTree is free for personal use and adds a tree view. Diskflag is a treemap too, with safe-to-clear flags, but it costs $8.
Questions
What is the best WinDirStat alternative?
It depends on what you want. WizTree is faster, TreeSize has an Explorer-style tree, SpaceSniffer is a portable treemap, and Diskflag flags what's safe to delete. WinDirStat itself is free, open source and still updated.
Is WinDirStat safe?
Yes. WinDirStat is open source under the GPL, so its code is public. Download it from the official GitHub project, not from a mirror. It shows sizes and offers cleanup commands you run yourself.
Does WinDirStat work on Windows 11?
Yes. The project lists support for Windows 7 through 11. The latest release is 2.9.3, from Oct 11, 2026.
Is WinDirStat still maintained?
Yes. Version 2.9.3 was released on Oct 11, 2026. Dark mode and direct NTFS MFT scanning (when run elevated) have been there since 2.5.0.
What's a good alternative to WizTree?
WinDirStat also scans the MFT when run elevated, TreeSize Free offers an Explorer-style tree, and Diskflag adds safe-to-clear flags. WizTree is still the pick for raw scan speed. See WizTree vs WinDirStat.
What's a good SpaceSniffer alternative?
WinDirStat is the closest free match, with a treemap plus sunbursts and flame graphs. WizTree is free for personal use. Diskflag is a treemap with safe-to-clear flags and costs $8.
Is there a WinDirStat alternative that tells me what is safe to delete?
Diskflag flags items as safe to clear, worth reviewing or managed by Windows, and gives the exact fix for each. Windows Storage settings also show cleanup recommendations by category. See what's safe to delete on Windows 11.
Is there a free WinDirStat alternative?
Yes. WizTree is free for personal use, TreeSize Free is $0 for home use, and SpaceSniffer is freeware. Windows Storage settings are included with Windows. Diskflag costs $8, once.
Is WizTree faster than WinDirStat?
Both can read the NTFS MFT when run as administrator. I have not benchmarked them against each other. See WizTree vs WinDirStat.
How fast is Diskflag compared to WizTree?
Slower. Diskflag uses standard Windows file APIs, not the NTFS MFT. A full scan of my 1 TB C: drive with 4.9 million files took about 3.5 minutes on the first run.
Does Windows have a built-in WinDirStat alternative?
Partly. Settings > System > Storage shows usage by category and cleanup recommendations, but not a map of every folder. Disk Cleanup (cleanmgr) still exists too.
Does Diskflag delete files by itself?
No. It only moves items to the Windows Recycle Bin, after you confirm. It refuses Windows system folders, Program Files, the drive root and your main profile folders.