Comparison
Dup vs Czkawka: similar video search without the setup
Czkawka is a free, open source cleaner for Linux, Windows and macOS with modes for duplicates, similar images and similar videos. Dup is a Mac app that finds duplicate and similar videos and photos with nothing to install first, and scans the Photos library as well as folders.
Pay with your Apple ID
Reaches folders App Store apps can't
The facts
- Czkawka's similar video mode relies on FFmpeg, which you install yourself before that mode works.
- Dup bundles its own video tools, so a video scan works the moment the app is installed.
- Dup shows each group side by side, can pick the copy to keep, and sends removed files to the Trash with an undo.
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
Side by side
| What you need | Dup | Czkawka |
|---|---|---|
| Find one video saved at different resolutions, codecs and containers | Yes. Matches 4K, 1080p and 720p copies across H.264, H.265 and ProRes, in MOV, MP4 or MKV | Has a similar videos mode |
| Setup before the first video scan | None. Dup bundles its own video tools, so there is no FFmpeg to install | Install FFmpeg yourself for the video mode |
| Where the scan runs | On your Mac. Nothing is uploaded | On your computer |
| Price | Free for up to 250 MB of deletions; Pro is $29.99 a year or $39.99 once | Free and open source |
Frequently asked questions
Does Czkawka need FFmpeg on a Mac?
Yes, for its similar video mode. FFmpeg has to be installed separately; Dup needs no such step because it ships its own video tools.
Can Dup scan my Photos library?
Yes. Dup scans the Photos library, including photos kept in iCloud, in the same pass as folders and external drives.
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+