Duplicate File Finder for Mac
Find duplicate files for free in your browser, without installing an app like dupeGuru. Add a folder or a drive. You can add more than one.
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How does this duplicate file finder work?
This duplicate finder is not connected to a server. It does not send any data. It lives in your browser, and it still works if you turn the internet off. At Tusk we believe apps should be built this way: privacy first, and doing locally what can be done locally.
You add a folder and the list appears. Files that share a name and a size are duplicates. A 100 GB video with the same name and the same size is listed without reading the video. You can add another folder and the list updates.
Files with the same size and the same date modified, but different names, are listed as potential duplicates. A checksum is optional. It reads those files only if you ask. Hidden system folders are skipped. Close the tab and the list is gone. Nothing is deleted.
How is this different from dupeGuru?
dupeGuru is an app you download and install. This check runs in the browser, so there is nothing to install. The files stay on your Mac. The checksum is computed in this tab.
dupeGuru can scan a whole disk and delete what it finds. This tool stops at the list. Use the CSV if you want a record of the paths. Deleting from a list of checksums, without a verified copy kept somewhere, is how people lose the only good file.
What if the duplicates are on more than one drive?
Add each drive as its own folder. A copy on an external drive and a copy on your Mac show up in the same group when the checksums match. This page does not remember the drives after you leave.
Tusk does. Point it at a drive you already have and it checksums the files, keeps the index after the drive is unplugged, and can move the extra copies to the Trash once a verified copy sits in a project. The disk cataloging comparison covers how that differs from a one-time scan. If you only need a file list, the disk cataloging tool does that without reading file contents.
FAQ
No. Nothing on this page talks to a server. Turn your internet off and the finder still works. The CSV is built in this tab. No file contents, names, or checksums are sent to Tusk.
Only if you ask it to. The first list uses file name, size, and date modified, which does not read the video. A checksum is a separate step for the possible duplicates, where the names differ.
No. It lists them. Keeping one copy and trashing the rest, after the copy is verified, is what Tusk does inside a project. This page does not change your drives.
Chrome, Edge, Arc, and Brave can open a mounted drive with the system folder picker. That prompt may say the site can view files and make copies. That means this tab can read them. Nothing is saved. If Chrome says a folder contains system files, pick a folder inside it. Safari and Firefox use a standard folder chooser. The checksum works the same way, and nothing is uploaded.