Choose by workflow
A classic treemap with separate Apple Silicon revival and Swift rewrite projects. If you need something different, compare these five options by the job they do. Choose by platform, features, and how you prefer to review files.
Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.
People who want a free, inspectable treemap and reusable scan records.
People who want free inspection and optional paid app/leftover cleanup.
Mac users who want a sunburst, cloud connections, and snapshot tools.
Mac users who prefer a free size-sorted browser to a chart.
Scroll across to compare
| Feature | Disk Inventory X | NullDisk |
|---|---|---|
| Best fit | Users interested in the classic treemap or its community successors. | Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. |
| Visualization | Treemap; features depend on X, Xs, or Y | Radial map, treemap, and file list; CLI terminal treemap |
| Platforms and requirements | Original X 1.3: macOS 10.13–10.15; Xs/Y requirements differ | Mac app: macOS 14+; CLI: macOS, Linux, Windows |
| Pricing and editions | Original X is free under the GPL; Xs and Y are independent community projects. | Direct Mac edition free with reminders; optional $9.99 one-time personal license or team seat removes reminders. App Store terms are separate. |
| Open source | Yes | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Check the selected project’s manual; X, Xs, and Y do not share a guaranteed cleanup contract. | Review source and action: local Trash, explicit permanent removal, or backup/delete; remote and cloud actions depend on the destination. |
| Reports and portability | Check export support in the exact X, Xs, or Y build. Retain its scan records separately; no direct import into NullDisk is documented. | CLI produces JSON/NDJSON scan reports. Third-party scan files are not directly imported into the Mac GUI. |
Check export support in the exact X, Xs, or Y build. Retain its scan records separately; no direct import into NullDisk is documented.
Users interested in the classic treemap or its community successors. Keep it if that matches your needs. Consider a change for a specific requirement such as a different chart, remote sources, report exports, or development cleanup.
GrandPerspective and SquirrelDisk offer free open-source analysis. OmniDiskSweeper is free on Mac. All direct Mac features in NullDisk are free with reminders; reminder removal is optional. Freeware does not necessarily mean open source.
No. Keep any historical exports you need and run a fresh scan of the same location. NullDisk does not import these apps’ saved scans or cleanup queues.