Dense tree navigation
Expand folders in place or open one as the current working directory. Size and count columns stay aligned for fast comparison.
A fast, open-source WizTree alternative for macOS
DuckDisk
See where your storage went. Scan local disks, OneDrive, Google Drive, and SSH storage, then clean up with confidence.
* Direct Download supports Apple Silicon and Intel. The current Mac App Store build supports Apple Silicon only.
* Mac App Store edition does not include Google Drive; Direct Download includes Google Drive.
New in 0.6.2 Fixed freezes during scanning and shutdown, and corrected Google Drive shared-file accounting. Read the release notes
Local + cloud
Analyze Mac, OneDrive, Google Drive, and SSH storage in one app.
Metadata-first
Cloud scans do not download file contents.
Open source
Inspect the code, report issues, and contribute.
Built for macOS
Finder, Keychain, and Full Disk Access integration.
A working view, not a dashboard
Every useful number, in one place.
DuckDisk keeps directory sizes, allocated space, item counts, file counts, folder counts, and extension totals visible while you navigate.
File type totals
Find the extensions consuming the most space without manually searching through every folder.
Targeted refresh
Refresh a changed file or folder from its context menu instead of rebuilding the entire result.
Deliberate cleanup
Collect files and folders in the delete area, review the list, and track completion or failures.
Cloud storage analysis
Your cloud storage, without the download.
Connect OneDrive or Google Drive and DuckDisk scans storage metadata through the provider API. Large cloud libraries can be analyzed without making every file available offline.
- Metadata-only full scans with resumable checkpoints
- Delta updates from the last completed cloud scan
- Fast follow-up scans from provider change records
- Move selected items to the provider's recoverable trash
Scan, inspect, clean up
See the workflow before you install.
Start a local scan, drill into the folders using the most space, then drag a cleanup target into the delete area and review it before removal.
Local-first by design
Your storage map belongs to you.
Local scans stay local
Disk and folder analysis runs on your Mac. Results are cached locally to support faster follow-up scans.
Cloud access is explicit
OneDrive and Google Drive use provider OAuth. Refresh credentials are stored in macOS Keychain, not in the project folder.
The code is inspectable
DuckDisk is licensed under AGPL-3.0-or-later and developed in public on GitHub.
Install DuckDisk
Choose your preferred install.
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1
Choose App Store or DMG
Install the sandboxed edition from Apple, or get the full direct build.
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2
Move DuckDisk to Applications
Open the image and drag DuckDisk into the Applications folder.
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3
Grant access when needed
Full Disk Access gives local scans the most complete result.
The Mac App Store edition is sandboxed and uses Apple-managed updates. The direct edition includes Google Drive and is Developer ID signed and notarized by Apple.
Questions
Before you scan.
Looking for the best WizTree alternative for macOS?
DuckDisk brings a WizTree-style, table-first workflow to macOS, then extends it with OneDrive, Google Drive, and SSH storage analysis. It is free, open source, and built specifically for Apple Silicon Macs.
Why does DuckDisk ask for Full Disk Access?
macOS protects folders such as Photos, Mail, Downloads, and application data independently. Full Disk Access reduces permission gaps during a whole-disk scan.
Why can scanned file space differ from macOS storage usage?
macOS includes APFS system volumes, snapshots, VM storage, filesystem metadata, and other reserved space. DuckDisk's tree represents files and folders it can enumerate.
Does cloud scanning download my files?
No. DuckDisk reads file and folder metadata from Microsoft Graph or Google Drive API. File contents are not downloaded for analysis.
What happens when I delete a cloud item?
DuckDisk asks the provider to move the selected item to OneDrive's Recycle Bin or Google Drive Trash, where it can normally be restored.
