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 Disk Xray alternatives
OmniDiskSweeper
A largest-first column browser for quick, no-frills cleanup.
WhatSize
A fast measuring sorter with column views and cleanup tools.
SimplyDiskSweeper
A minimal sorted-list cleaner for quick disk sweeps.
SpacePeek
A read-only Quick Look inspector for folders and archives.
直接比較: NullDisk vs Disk Xray
| NullDisk | Disk Xray | |
|---|---|---|
| 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: Disk Xray
| Disk Xray | |
|---|---|
| Vendor | Naarak Studio |
| Platform | macOS |
| Pricing | Freemium — Free tier; Pro via yearly subscription or lifetime 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 via yearly subscription or lifetime 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
- Bundles analyzer, duplicates, uninstaller, and shredder in one app
- Free tier covers basic scanning
- Guided cleanup suits users who want decisions made for them
－ 弱み
- Subscription pricing for full features where rivals charge once
- Analyzer view is list-led rather than a rich visual map
- All-in-one scope means each tool is shallower than a specialist
よくある質問
What is the best alternative to Disk Xray for Mac?
For most Mac users it's NullDisk: native SwiftUI, a radial sunburst map, a staged removal collector, and zero data collection. Disk Xray users who want list views and freemium pricing will feel at home within minutes.
Is there a free alternative to Disk Xray?
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 Disk Xray to NullDisk?
Note the largest folders Disk Xray 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
Disk Xray 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 →