Best Disk Space Analyzers in 2026
Updated
In short: TreeSize is ranked #1 of 104 as of 5 October 2026, ahead of WizTree and FolderSizes. The best-ranked option with a free plan is WizTree. The lowest first paid tier on this page is Sift at $1.67/mo.
Finding what consumes drive storage can be easier when a tool breaks usage down in ways you can inspect. Compared on scan scope, application sizes, external drive scans, file-type breakdowns, and treemap views, these analyzers offer different perspectives on storage. TreeSize, WizTree, and FolderSizes are among the entries shown. Desktop platform support and exportable reports can matter if you need to review results across devices or save them for later. Check free-plan availability and paid-from pricing as you compare tools for the drives you use.
104 disk space analyzers ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
20 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | TreeSizeWindows | Two bars | — | 1 of 6 | Free | 8.0 | |
| 2 | WizTreeWindows · Mac | Two bars | — | 2 of 6 | $25/mo | 8.0 | |
| 3 | FolderSizesWindows | Two bars | — | 1 of 6 | Free | 7.8 | |
| 4 | SizeTrendWindows | Two bars | — | 1 of 6 | Free | 7.8 | |
| 5 | Disk Analyzer ProWindows · Mac | Two bars | — | 2 of 6 | Free | 7.7 | |
| 6 | StorageRadarMac | Two bars | — | 1 of 6 | $9.99/mo | 7.6 | |
| 7 | Disk AuditorWindows | Two bars | — | 1 of 6 | Free | 7.5 | |
| 8 | Drive AtlasWindows · Linux | Two bars | — | 2 of 6 | $20/mo | 7.5 | |
| 9 | DiskAtlasMac | Two bars | — | 1 of 6 | $5/mo | 7.4 | |
| 10 | LumaDiskWindows · Mac | Two bars | — | 2 of 6 | $6.89/mo | 7.4 | |
| 11 | Folder SizeWindows | Two bars | — | 1 of 6 | $24.95/mo | 7.3 | |
| 12 | Space WizardWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 7.3 | |
| 13 | gduWeb · Windows · Mac · Linux | Three bars | — | 4 of 6 | Free | 7.2 | |
| 14 | OverCleanMac | Two bars | — | 1 of 6 | $9.99/mo | 7.1 | |
| 15 | SpaceMapMac | Two bars | — | 1 of 6 | Free | 7.1 | |
| 16 | DiskBrainWindows | Two bars | — | 1 of 6 | $2/mo | 7.0 | |
| 17 | FilelightWindows · Linux | One bar | — | — | 2 of 6 | — | 6.9 |
| 18 | winTrimWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.9 | |
| 19 | WinDirStatWindows | One bar | — | — | 1 of 6 | — | 6.8 |
| 20 | eDirStatWindows · Mac · Linux | Two bars | — | — | 3 of 6 | — | 6.8 |
| 21 | OpenDiskMac | One bar | — | 1 of 6 | Free | 6.8 | |
| 22 | SiftMac | Two bars | — | 1 of 6 | $1.67/mo | 6.8 | |
| 23 | FreeSizeWindows · Mac · Linux | Three bars | — | 3 of 6 | CHF 2.42/mo | 6.8 | |
| 24 | OmniDiskSweeperMac | No signal | — | — | 1 of 6 | — | 6.7 |
| 25 | Disk Usage AnalyzerLinux | One bar | — | — | 1 of 6 | — | 6.7 |
Compare all 25 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Desktop platforms | Treemap view |
|---|---|---|---|---|---|---|---|---|
| 1 | TreeSize | 8.0 | Free plan | Free | Yes | Free | Windows | Yes |
| 2 | WizTree | 8.0 | Free plan | $25/mo | Yes | $25one-time | Windows, macOS | Yes |
| 3 | FolderSizes | 7.8 | Free plan | Free | Yes | $30one-time | Windows | Yes |
| 4 | SizeTrend | 7.8 | Free plan | Free | Yes | $69.99one-time | windows | — |
| 5 | Disk Analyzer Pro | 7.7 | Free plan | Free | Yes | — | windows, macos | — |
| 6 | StorageRadar | 7.6 | Free plan | $9.99/mo | Yes | $9.99one-time | macos | Yes |
| 7 | Disk Auditor | 7.5 | Free plan | Free | Yes | — | Windows | Yes |
| 8 | Drive Atlas | 7.5 | Free plan | $20/mo | Yes | $20one-time | windows, linux | Yes |
| 9 | DiskAtlas | 7.4 | Free plan | $5/mo | Yes | $5one-time | macos | Yes |
| 10 | LumaDisk | 7.4 | Free plan | $6.89/mo | Yes | $6.89one-time | macOS, Windows | Yes |
| 11 | Folder Size | 7.3 | Free plan | $24.95/mo | Yes | $24.95one-time | windows | — |
| 12 | Space Wizard | 7.3 | Free plan | Free | Yes | — | Windows, macOS, Linux | No |
| 13 | gdu | 7.2 | Free plan | Free | Yes | — | Linux, macOS, Windows | Yes |
| 14 | OverClean | 7.1 | Free plan | $9.99/mo | Yes | $9.99one-time | macos | — |
| 15 | SpaceMap | 7.1 | Free plan | Free | Yes | — | macos | Yes |
| 16 | DiskBrain | 7.0 | Free plan | $2/mo | Yes | — | windows | — |
| 17 | Filelight | 6.9 | No | — | Yes | — | Linux, Windows | Yes |
| 18 | winTrim | 6.9 | Free plan | Free | Yes | — | windows, macos, linux | Yes |
| 19 | WinDirStat | 6.8 | No | — | Yes | — | Windows | Yes |
| 20 | eDirStat | 6.8 | No | — | Yes | — | windows, macos, linux | Yes |
| 21 | OpenDisk | 6.8 | Free plan | Free | Yes | — | macos | — |
| 22 | Sift | 6.8 | Free plan | $1.67/mo | Yes | — | macOS | No |
| 23 | FreeSize | 6.8 | Free plan | CHF 2.42/mo | Yes | — | windows, macos, linux | Yes |
| 24 | OmniDiskSweeper | 6.7 | No | — | Yes | — | macos | — |
| 25 | Disk Usage Analyzer | 6.7 | No | — | Yes | — | Linux | Yes |
Is your app on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which disk space analyzer is ranked first on Freedom251?
TreeSize is ranked #1 of 104 with a score of 8.0. WizTree is second and FolderSizes third.
How many of these have a free plan?
20 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Sift has the lowest first paid tier we found: $1.67/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.