Head to head
| JDiskReport | Klarity Disk | |
|---|---|---|
| Visualization | Charts | Treemap |
| Platform | Windows + Mac + Linux (Java) | macOS |
| Pricing | Free Free of charge from JGoodies | Paid Paid one-time purchase (around $7 at time of writing) |
| Open source | No | No |
| Native Mac | No | Yes |
Updated September 2026 · Prices change — please verify with the vendor.
JDiskReport
Java statistics charts that find your most obsolete folders.
＋ JDiskReport: Strengths
- Rich statistics: size, age, and file-type distributions
- Free on every Java-capable platform
- Top-50 lists answer 'what's biggest' instantly
－ JDiskReport: Weaknesses
- Java UI feels alien on a modern Mac
- No deletion workflow — analysis only
- Aging codebase with infrequent updates
Read the review: JDiskReport → · JDiskReport See alternatives →
Klarity Disk
A private offline analyzer with treemaps and system monitoring.
＋ Klarity Disk: Strengths
- Fully offline analysis with a no-telemetry privacy stance
- Treemap plus icicle views and a system monitor in one app
- One-time price with no subscription
－ Klarity Disk: Weaknesses
- Treemap-first; no sunburst option for radial-map fans
- Smaller vendor with less social proof than category leaders
- Monitoring extras may duplicate tools you already own
Read the review: Klarity Disk → · Klarity Disk See alternatives →
Verdict: JDiskReport vs Klarity Disk
Choose JDiskReport if you want charts visualization on Windows + Mac + Linux (Java). Choose Klarity Disk if you prefer treemap views at paid pricing on macOS. And if you want a native Mac sunburst with a staged collector and zero telemetry, NullDisk is the third option that beats both on workflow.
Frequently asked questions
Which is better, JDiskReport or Klarity Disk?
JDiskReport wins on charts visualization for Windows + Mac + Linux (Java); Klarity Disk wins on treemap views for macOS. On price, Free (JDiskReport) vs Paid (Klarity Disk). The honest answer depends on your OS and whether you prefer maps or lists — read the verdict below.
Is there something better than both?
If you want a native Mac sunburst with allocated-size honesty, a staged removal collector, and zero data collection, NullDisk beats both on workflow — even where JDiskReport or Klarity Disk wins on price.