Windows · v1.0.0 · Local only
Winnow scans your drives, shows you what's taking up space twice, and helps you clean it up safely. Your files never leave your computer.
Download for WindowsHow it works
Pick any folders or drives. Winnow reads every file and checks if you have exact copies — even if they're renamed or stored in different folders.
Duplicates are grouped and shown clearly — how much space they're wasting and which copy to keep. Nothing happens until you decide.
Move duplicates to a backup folder first, then delete with confidence. Winnow shows you exactly what will happen before anything is removed.
What Winnow is
No account. No cloud upload. Winnow never watches what you do or reports anything back. Your files never leave your drive.
0 bytes sent to any server · no network required
Renamed files, moved files, files buried in different folders — if two files are truly identical, Winnow finds them. It reads actual file contents, not just names or dates.
reads file contents · not just names or dates
Winnow moves duplicates to a backup folder of your choice before anything is removed. You review, you confirm, you delete. There are no surprises.
preview everything · confirm before removal · backup preserved
Buy once, use forever. No subscription, no renewal, no internet required after install. It runs on your machine and stays there.
one-time purchase · no subscription · works offline
Winnow v1.0.0 for Windows
No account. No subscription. Runs on Windows 10 and 11.
Download WinnowWinnow never connects to the internet after install. No cloud, no tracking, nothing phoning home. Verify the SHA-256 checksum in the release notes if you want to be certain.
No cloud. No account. Winnow stores everything in a local SQLite database on your machine. Uninstall removes it completely.