FreeSize scans your drives and shows you — as a treemap and sunburst — what's really eating space, largest items first. Fast, precise, no tracking.
A calm interface with the tools that actually help — instead of a graveyard of numbers.
Size becomes area and colour — as a treemap or sunburst. The biggest space hogs glow warm, so you spot them in seconds.
The tree grows live while scanning — top levels first. No waiting for a finished report.
One tool for Windows, macOS and Linux — identical to use, without OS-specific quirks.
FreeSize keeps an eye on your drives and warns you before things get tight. Pro
All your devices at a glance: history, trends and usage of your volumes — hosted in Switzerland. Pro
Local analysis, no telemetry, no selling of data. What's on your disk stays your business.
Every tile — or every segment — is a folder or a file. Area equals size, colour the heatmap. Pick the view that suits you: compact treemap or radial sunburst. One click zooms in, the breadcrumb bar leads back.
FreeSize is developed and maintained in Switzerland. The portal runs on servers in Swiss data centres and is subject to Swiss data protection law.
The analysis happens locally on your device. Only if you want it does FreeSize Pro send anonymous usage metrics — never your file names or contents.
An interactive demo with sample data — tree, treemap and sunburst, no installation needed.
The analyzer is and stays free. Pro unlocks monitoring and the portal.
For everyone who wants to clean up.
For everyone who wants to stay on top.
Quick answers — from price and privacy to the supported systems.
Yes. FreeSize is available as a free version for Windows, macOS and Linux. FreeSize Pro (CHF 29 per year) optionally unlocks background monitoring and the FreeSize portal.
No. The analysis runs entirely locally on your device — file names and contents are never transmitted. No tracking, no ads. The app is code-signed (DigiCert EV) and notarized on macOS.
Pick a drive or a path and click “Scan”. FreeSize shows you — as a sorted list and as a treemap — which folders and files take up the most space, largest first.
Both visualize the same storage. The treemap shows sizes as nested rectangles (ideal for direct size comparison), the sunburst as a radial hierarchy (ideal for seeing folder depth).
Windows 10 and 11, macOS (Apple Silicon) and Linux as an AppImage (Ubuntu 24.04 or newer). The experience is identical across platforms.
Yes. FreeSize offers a modern, cross-platform disk-space analysis with treemap and sunburst — without tracking and made in Switzerland. Unlike Windows-only tools, FreeSize also runs on macOS and Linux.
No. FreeSize performs a read-only analysis and never changes or deletes anything on its own. You decide what to clean up afterwards.
FreeSize — C:\