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Flare Scan review

Free#18 of 104 in Disk Space Analyzers

A free Mac analyzer for visual storage breakdowns, duplicates, large files, and scan changes.

7.0/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Flare Scan is an open-source disk space analyzer for macOS users who want to inspect selected folders or volumes without accounts, telemetry, cloud services, or third-party runtime dependencies. Its free plan focuses on local storage analysis, combining visual maps with file-type categories, large-file discovery, duplicate detection, and recoverable cleanup through macOS Trash. It is suited to Mac users who want a detailed view of where storage is going, especially when duplicate files are a priority.

The standout feature set is the combination of interactive Sunburst and Treemap visualizations with exact duplicate detection using SHA-256. Flare Scan can identify the largest files and old large files, while local scan baselines allow users to compare storage changes over time. JSON and CSV exports support reporting outside the application, and external drive scanning broadens the locations it can inspect. A menu-bar memory monitor adds application memory tracking alongside disk analysis.

Platform fit is the main constraint: the product is built for macOS, with the checked-in artifact requiring macOS 14 Sonoma or newer and Apple Silicon. Its cleanup workflow is deliberately recoverable, moving verified items to macOS Trash rather than permanently deleting them. Choose Flare Scan if you want free, local, open-source analysis with strong visualization, duplicate matching, scan comparisons, and exports. Users needing a Windows or Linux tool, or a different hardware and operating-system combination, should choose another disk space analyzer.

Flare Scan pros and cons

  • Where it wins
    • Sunburst and Treemap views make storage usage easy to inspect
    • SHA-256 duplicate detection supports exact file matching
    • Exports JSON and CSV reports and moves verified items to Trash
  • Where it doesn't
    • Runs only on macOS, limiting cross-platform use
    • Requires macOS 14 Sonoma or newer on Apple Silicon
    • Cleanup moves items to macOS Trash rather than permanently deleting them

Flare Scan fact sheet, pricing and score →

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