Which fits your needs?
JDiskReport: Users who want cross-platform disk statistics and already use Java.
OmniDiskSweeper: Mac users who prefer a free size-sorted browser to a chart.
Features, pricing, and workflow
Scroll across to compare
| Feature | JDiskReport | OmniDiskSweeper |
|---|---|---|
| Best fit | Users who want cross-platform disk statistics and already use Java. | Mac users who prefer a free size-sorted browser to a chart. |
| Visualization | Overview statistics charts and detail tables | Largest-first column browser |
| Platforms and requirements | macOS, Windows, Linux (Java) | macOS |
| Pricing and editions | No-charge, ad-free freeware; this does not mean open source. | Free download from The Omni Group. |
| Open source | No | No |
| Native macOS UI | Cross-platform interface | Yes |
| Cleanup workflow | Use the statistics to guide file review; the cited overview does not specify removal semantics. | Open or Trash selected files from the size-sorted browser. |
| Reports and portability | Preserve any saved scan files supported by your version and keep important table entries. NullDisk does not import JDiskReport scan files. | The official overview does not document report export. Keep important paths separately before rescanning in NullDisk. |
JDiskReport: what stands out
A good fit for users who want cross-platform disk statistics and already use Java.
JDiskReport: strengths
- Disk usage statistics in charts and tables
- Runs across Java-capable desktop systems
- Free without ads or expiry
Considerations
- Requires a compatible Java runtime
- Freeware rather than an open-source project
- Check the manual for report storage and file-management actions
OmniDiskSweeper: what stands out
A good fit for Mac users who prefer a free size-sorted browser to a chart.
OmniDiskSweeper: strengths
- Largest-first file and folder browsing
- Open items or move them to Trash
- Official downloads include versions for older Macs
Considerations
- Column browsing rather than a graphical disk map
- Check the download requirements for your macOS version
- The cited overview does not document saved reports or duplicate matching
For a useful comparison on your own drive, match the scan root, access permissions, and size mode. Chart style changes how you explore the results; it does not by itself establish measurement accuracy.
Common questions
When should I choose JDiskReport?
A good fit for users who want cross-platform disk statistics and already use Java. No-charge, ad-free freeware; this does not mean open source.
When should I choose OmniDiskSweeper?
A good fit for Mac users who prefer a free size-sorted browser to a chart. Free download from The Omni Group.
Will both apps show the same size?
Not necessarily. Match the scan root, permissions, exclusions, and logical/allocated-size mode. Hard links, APFS clones, snapshots, sparse files, and cloud placeholders can change totals. A reported size is not a guaranteed amount recovered after deletion.