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 SpacePeek alternatives
OmniDiskSweeper
A largest-first column browser for quick, no-frills cleanup.
WhatSize
A fast measuring sorter with column views and cleanup tools.
Disk Xray
All-in-one analyzer, duplicate finder, uninstaller, and shredder.
SimplyDiskSweeper
A minimal sorted-list cleaner for quick disk sweeps.
直接比較: NullDisk vs SpacePeek
| NullDisk | SpacePeek | |
|---|---|---|
| Visualization | Sunburst radial map | List |
| Platform | macOS 14+ | macOS |
| Pricing | Paid | Freemium |
| Open source | No (offline, zero-data) | No |
| Cleanup flow | Staged collector → Trash | Direct deletion from lists |
基本情報: SpacePeek
| SpacePeek | |
|---|---|
| Vendor | Fu Wang (independent) |
| Platform | macOS |
| Pricing | Freemium — Free tier; Pro is a cheap one-time unlock |
| Visualization | List |
| Open source | No |
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 tier; Pro is a cheap one-time unlock.
NullDiskが向く人 …
- A radial sunburst map instead of lists or treemaps — see usage at a glance and drill in with a click.
- Honest one-time purchase instead of subscriptions or gated tiers.
- Fully offline with a published zero-data policy — nothing ever leaves your Mac.
Pros & cons
＋ 強み
- Read-only by design — it cannot delete anything, so it's extra safe
- Peeks inside folders and archives with Finder-style Quick Look
- Very cheap Pro unlock
－ 弱み
- Read-only means no cleanup workflow at all
- No sunburst or treemap overview of a whole drive
- Niche tool, not a full disk analyzer
よくある質問
What is the best alternative to SpacePeek for Mac?
For most Mac users it's NullDisk: native SwiftUI, a radial sunburst map, a staged removal collector, and zero data collection. SpacePeek users who want list views and freemium pricing will feel at home within minutes.
Is there a free alternative to SpacePeek?
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 SpacePeek to NullDisk?
Note the largest folders SpacePeek 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
SpacePeek is a capable tool for list fans on macOS. 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 →