FreeSize review
A read-only analyzer with visual scans for free and ongoing monitoring in Pro.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
FreeSize is a desktop disk-space analyzer for Windows, macOS and Linux. It scans selected drives or paths and shows storage usage through sorted files and folders, treemap, sunburst and heatmap views. The read-only approach suits users who want to understand what occupies storage without automatic file changes. It is particularly relevant for anyone seeking ongoing visibility across local devices, while the free plan covers users who need on-demand analysis.
The Free plan includes unlimited scans, all three visualization types, Windows, macOS and Linux support, and light and dark mode. The published plans show the Pro tier at CHF 29 per year, adding everything in Free plus background monitoring, FreeSize Portal and history, and centralized use across multiple devices. FreeSize also supports live, progressive scans, giving the analyzer a way to present results as scanning develops. For recurring storage oversight, the Pro additions are the main distinction from the no-cost plan.
FreeSize’s standout focus is visualizing files and folders through multiple views while keeping analysis local and read-only. Pro extends that focus with background drive monitoring and usage history with volume trends through FreeSize Portal, which makes it a better fit for users who want storage patterns over time rather than occasional checks. Users who need an analyzer for selected locations, visual breakdowns and ongoing monitoring should consider FreeSize. Those seeking automatic file deletion or modification should choose a tool designed for active cleanup instead.
FreeSize pros and cons
- Where it wins
- Three visualization types: treemap, sunburst and heatmap
- Runs on Windows, macOS and Linux
- Pro adds background monitoring and cross-device history
- Where it doesn't
- Background monitoring requires the Pro plan
- Scans cover selected drives or paths rather than automatic cleanup
- Read-only analysis does not modify or delete files
FreeSize fact sheet, pricing and score →
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