NullDisk our pick
A native macOS disk-space analyzer with an interactive radial map. Native SwiftUI, allocated-size honesty, staged Trash-based removal, zero data collection.
Top 5 SquirrelDisk alternatives
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Nektony Disk Space Analyzer Pro
The Pro App Store scanner for moving or removing bulky content.
直接比較: NullDisk vs SquirrelDisk
| NullDisk | SquirrelDisk | |
|---|---|---|
| Visualization | Sunburst radial map | Sunburst |
| Platform | macOS 14+ | macOS + Windows + Linux |
| Pricing | Paid | Open source |
| Open source | No (offline, zero-data) | Yes |
| Cleanup flow | Staged collector → Trash | Varies by tool |
基本情報: SquirrelDisk
| SquirrelDisk | |
|---|---|
| Vendor | Adileo Barone |
| Platform | macOS + Windows + Linux |
| Pricing | Open source — Free and open source (AGPL-3.0) |
| Visualization | Sunburst |
| Open source | Yes |
2026年9月更新 · 価格は変動します。提供元でご確認ください。 執筆時点の価格: Free and open source (AGPL-3.0).
NullDiskが向く人 …
- Truly native: Swift and SwiftUI on macOS, not a cross-platform toolkit.
- A staged removal collector: queue suspects, review, then Trash everything together.
- Allocated-size measurement with hard-link dedup, so reclaimed space matches reality.
Pros & cons
＋ 強み
- Free and open source on every desktop OS
- Genuinely easy sunburst experience
- No account, no telemetry, no upsell
－ 弱み
- Java-based UI rather than native Mac controls
- No collector tray or staged-removal workflow
- Solo-maintainer pace on features and fixes
よくある質問
What is the best alternative to SquirrelDisk for Mac?
For most Mac users it's NullDisk: native SwiftUI, a radial sunburst map, a staged removal collector, and zero data collection. SquirrelDisk users who want sunburst views and open source pricing will feel at home within minutes.
Is there a free alternative to SquirrelDisk?
Yes — GrandPerspective and Disk Inventory X are free and open source with genuine treemap analysis. They lack NullDisk's collector workflow and sunburst map, but they find the biggest hogs fast.
How do I switch from SquirrelDisk to NullDisk?
Note the largest folders SquirrelDisk flagged, then run the same scan in NullDisk and rebuild the cleanup in its removal collector. The full walkthrough is on our switching guide.
まとめ
SquirrelDisk is a fine free tool for sunburst fans on macOS + Windows + Linux. But if you want the whole job — see, stage, and safely remove — done natively on a modern Mac, NullDisk is the upgrade. 移行ガイド →