OpenDisk review
A fast local Mac scanner with live visual analysis and one-click cleanup.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
OpenDisk is a free, open-source disk space analyzer for Mac users who want to understand and reclaim local storage. It scans drives or folders and presents usage through an interactive sunburst chart, a sortable Finder-style folder list, and live scan-result streaming. The app runs natively on Apple Silicon and Intel Macs, works locally without telemetry or an account, and automatically shows external drives when connected. Its MIT license also makes the project’s open-source status clear.
The scanning experience is the standout feature. Incremental rescans use filesystem events, so subsequent scans can focus on changes rather than treating every review as a first pass. Instant search works across scanned storage, while the purgeable-space and cache breakdown helps separate potentially reclaimable storage from ordinary files. A collector lets users gather files and folders for review before deleting them, and one-click cleanup is included in the Free plan. This combination suits users who want a visual overview without adding an account or sending storage information away from the Mac.
OpenDisk keeps its scope narrow. It is available only for macOS and requires macOS 26 or later, so it is not a fit for Windows users or Macs running earlier systems. The published Free plan includes the interactive sunburst chart, one-click cleanup, the MIT license, and local operation with no telemetry; there are no paid tiers to compare. Users who need file-type grouping, application-size reporting, or exported reports should choose a disk analyzer built around those workflows instead. For Mac users focused on live folder-level scanning, cache and purgeable-space inspection, and direct cleanup, OpenDisk is a focused free option.
OpenDisk pros and cons
- Where it wins
- Live sunburst scans with incremental rescans and instant search
- Breaks down purgeable space and caches for targeted cleanup
- Open-source, local operation with no account or telemetry
- Where it doesn't
- macOS-only and requires macOS 26 or later
- No file-type grouping or application-size reporting
- No report exports or paid-plan options
OpenDisk fact sheet, pricing and score →
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