A fast, native macOS app for visualizing and analyzing disk space usage.
- Multiple Visualizations — File tree, list view, pie chart, treemap, and file type breakdown
- Fast Scanning — Async directory enumeration with live progress; cancellable at any time
- Smart Bar Visualization — Square-root scale bars make size differences immediately visible
- Largest Files — Top 100 largest files with one-click Reveal in Finder or Move to Trash
- File Type Analysis — Aggregated breakdown by extension with size and count
- Disk Usage Overview — Ring chart with free/used/purgeable space and APFS volume info
- Stale File Detection — Identifies files not modified for 1–5+ years
- Cloud Storage Skip — Skips OneDrive, Dropbox, iCloud Drive etc. to avoid triggering sync
- Full Disk Access — Permission banner guides you through granting access for system folders
- Dark & Light Mode — Follows macOS appearance; switchable in toolbar
- Localized — English and German
👉 Download FileSizeScanner.zip
Unzip, move FileSizeScanner.app to your /Applications folder, and launch.
macOS blocks apps from unidentified developers by default. This is expected for apps distributed outside the App Store. Follow these steps once:
- Try to open the app — macOS shows a warning and blocks it
- Open System Settings → Privacy & Security
- Scroll down to the Security section
- Click "Open Anyway" next to the FileSizeScanner entry
This confirmation is only needed once per Mac. After that, the app opens normally.
- macOS 14.0 (Sonoma) or later
- Apple Silicon or Intel Mac
- Launch FileSizeScanner — your Home folder is scanned automatically
- Navigate the file tree in the sidebar to drill into folders
- Switch tabs to explore different visualizations (Overview, List View, Pie Chart, Treemap, File Types, Largest Files)
- Click any folder to select it and see its contents in the detail panel
- Use Edit Mode (lock icon in toolbar) to safely move files to Trash
- Use the Cloud button in the toolbar to skip OneDrive/Dropbox during scanning
FileSizeScanner reads your filesystem to compute sizes. It does not collect, transmit, or store any data. All processing happens entirely on your Mac.
If you find a bug or have a feature request, please open an issue.
