Guide
Duplicate video finder for Mac: find copies at any resolution
A duplicate video finder for Mac compares what videos show rather than their names or bytes, so a 4K original and its 1080p or 720p copy are found as one group. Dup does this on your Mac for MOV, MP4 and MKV files in H.264, H.265 or ProRes, and shows each group side by side before anything is deleted.
Pay with your Apple ID
Reaches folders App Store apps can't
The facts
- A re-encoded copy differs from its original in size, bit rate and checksum, so a byte comparison sees two unrelated files.
- Dup samples frames throughout each video and builds a visual fingerprint, so the same footage matches at 4K, 1080p or 720p.
- Dup bundles its own video tools, so there is no FFmpeg to install, and it reads folders, external drives and the Photos library.
One clip in three files, a 4K MOV, a 1080p MP4 and a copy, found by Dup as one group even though their names, sizes and formats differ.
One clip in three files, found as one group
Step by step
| Step | What you do | What Dup does |
|---|---|---|
| 1 | Choose the folders or drives that hold your videos | Reads the MOV, MP4, MKV and other video files there, and the Photos library if you add it |
| 2 | Start the scan | Fingerprints every video on your Mac; nothing is uploaded |
| 3 | Open a group | Shows the copies of one clip side by side with their resolution and size |
| 4 | Keep one copy and remove the rest | Sends the rest to the Trash, where the cleanup can be undone |
Frequently asked questions
How do I find duplicate videos on a Mac?
Use a duplicate video finder that compares what videos show, not their bytes, so re-encoded copies are caught. Dup does this on your Mac across resolutions, codecs and containers, and lets you compare each group before deleting.
Can Dup find the same video in 4K and 1080p?
Yes. Dup matches the footage rather than the file, so a 4K original and a 1080p or 720p copy land in one group, even across H.264, H.265 and ProRes.
How much does Dup cost?
Dup is free to download and removes up to 250 MB of duplicates at no cost. Pro removes that limit for $29.99 a year, or $39.99 once for a lifetime license.
Try it on your own library
Free to try, with 250 MB of cleanup included. Nothing leaves your Mac, on any plan.
Pay with your Apple ID
Reaches folders App Store apps can't
macOS 13+