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 JDiskReport alternatives
LumaDisk
A light-speed sunburst that turns your filesystem into light.
DiskPoint
Privacy-focused free cleanup with offline visualization.
Diskaroo
A treemap visualizer with collector tray and smart filters.
SquirrelDisk
The easiest open-source sunburst for hunting huge files.
Mand mod mand: NullDisk vs JDiskReport
| NullDisk | JDiskReport | |
|---|---|---|
| Visualization | Sunburst radial map | Charts |
| Platform | macOS 14+ | Windows + Mac + Linux (Java) |
| Pricing | Paid | Free |
| Open source | No (offline, zero-data) | No |
| Cleanup flow | Staged collector → Trash | Varies by tool |
Nøglefakta: JDiskReport
| JDiskReport | |
|---|---|
| Vendor | JGoodies (Karsten Lentzsch) |
| Platform | Windows + Mac + Linux (Java) |
| Pricing | Free — Free of charge from JGoodies |
| Visualization | Charts |
| Open source | No |
Opdateret september 2026 · Priser ændres — verificér hos leverandøren. Pris ved skrivetidspunkt: Free of charge from JGoodies.
NullDisk passer, hvis …
- Truly native: Swift and SwiftUI on macOS, not a cross-platform toolkit.
- A radial sunburst map instead of lists or treemaps — see usage at a glance and drill in with a click.
- Fully offline with a published zero-data policy — nothing ever leaves your Mac.
Pros & cons
＋ Styrker
- Rich statistics: size, age, and file-type distributions
- Free on every Java-capable platform
- Top-50 lists answer 'what's biggest' instantly
－ Svagheder
- Java UI feels alien on a modern Mac
- No deletion workflow — analysis only
- Aging codebase with infrequent updates
Ofte stillede spørgsmål
What is the best alternative to JDiskReport for Mac?
For most Mac users it's NullDisk: native SwiftUI, a radial sunburst map, a staged removal collector, and zero data collection. JDiskReport users who want charts views and free pricing will feel at home within minutes.
Is there a free alternative to JDiskReport?
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 JDiskReport to NullDisk?
Note the largest folders JDiskReport flagged, then run the same scan in NullDisk and rebuild the cleanup in its removal collector. The full walkthrough is on our switching guide.
Kort sagt
JDiskReport is a fine free tool for charts fans on Windows + Mac + Linux (Java). But if you want the whole job — see, stage, and safely remove — done natively on a modern Mac, NullDisk is the upgrade. Skifteguide →