Same clip. Different file. Found.

The duplicate video finder for Mac that matches 4K to 720p and MKV to MP4. The first 250 MB is free.

Pay with your Apple ID

Reaches folders App Store apps can't

12.4 GB freed · 19 copies

Formats: MOV
MP4
MKV
AVI
HEIC
JPG
Resolutions: 4K to 480p
Codecs: H.264
HEVC
ProRes
Privacy: On your Mac, nothing uploaded

What Dup sees

A 4K MOV, a 1080p MP4 and a copy are found as one group.

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.
Check two copies under one wipe, let auto-keep choose, and undo in one step.

Two copies of one clip side by side under a wipe, Dup's auto-keep choosing the higher-resolution copy, and the removal undone in one step.
Find one person across your photos and videos, and remove them all at once.

Dup finding every photo and video of one person across a library, and the owner choosing that person to remove.
Scan the Photos library as well as folders, photos kept in iCloud included.

Dup scanning the Photos library, including photos kept in iCloud, and grouping the duplicates it finds there.

More tools in the same app

Dup listing a Mac's developer caches, Xcode DerivedData, a project's node_modules and a Cargo target folder, each with its size, then choosing all three and pressing Clean.

Clean dev caches
Xcode, npm, Cargo, pip: reclaim wasted storage with one click.
Dup's photo quality results: a grid of photos, each flagged with its fault, such as blurry, too dark or too bright.

Photo quality
AI detects blurry, dark, and overexposed photos. Clean them up in one click.
Dup listing large files nobody has opened in months, a disk image, a screen recording and an archive, sorted by size, each with when it was last opened.

Find forgotten files
Surface big files you forgot existed: old DMGs, screen recordings, abandoned ZIPs.
Dup watching a folder for duplicates, then reporting the new duplicates it found there in a notice inside the app.

Duplicate monitor
Watches your folders and alerts you when new duplicates appear.

How Dup compares

What you need	Dup	Gemini 2	PhotoSweeper	dupeGuru
Finds one video saved at 4K, 1080p and 720p	Yes, by what the frames show	Exact copies of videos only	Photos only, no video	Exact copies or similar names
Matches MKV to MP4 and MOV to MP4	Yes, across containers and codecs	No, the files differ byte for byte	No video support	No, only by name or exact content
Scans the Photos library and iCloud photos	Yes, iCloud photos included	Yes, the Photos library	Yes, the Photos library	Folders only
Shows two copies side by side before you delete	Yes, one frame under a wipe	Yes, a preview of each file	Yes, side by side	A list with file details
What it costs	250 MB free, then $29.99 a year or $39.99 once	Paid, also in Setapp	Paid	Free and open source

Other apps' features as their own websites describe them, checked September 2026.

Dup vs the Photos app Dup vs Gemini 2

100% Offline

Your files never leave this Mac

Your files never leave your Mac. Dup processes everything locally: no uploads, no cloud, no tracking.

Dup does not collect, access, or transmit:

Your files, file names, or folder paths
Scan results or duplicate detection data
Payment information (Apple handles all transactions)
Personal identifiers, location data, or contacts

Simple pricing

Start free. Upgrade when you need more.

Free

Duplicate detection
Delete to Trash
Cross-Format Detection
Remove Someone
Photo quality scan
Forgotten files scanner
Cloud drive support
— 250 MB cleanup limit
— Smart Select
— Folder monitor

Pro

$29.99/year

7-day free trial · just $0.08/day

Duplicate detection
Delete to Trash
Cross-Format Detection
Remove Someone
Photo quality scan
Forgotten files scanner
Cloud drive support
Unlimited cleanup
Smart Select
Folder monitor

Activate on up to 3 Macs

Or subscribe via Mac App Store

Recommended

Lifetime

$39.99 once

Pay once, yours forever

Duplicate detection
Delete to Trash
Cross-Format Detection
Remove Someone
Photo quality scan
Forgotten files scanner
Cloud drive support
Unlimited cleanup
Smart Select
Folder monitor
All future updates

Activate on up to 3 Macs

Or buy via Mac App Store

Frequently asked questions

Yes. By default, Dup moves files to Trash so you can recover them at any time from Finder. You can also choose permanent deletion if you prefer.

No. All scanning and comparison happens entirely on your Mac. Your files never leave your device: no cloud, no uploads, no tracking.

Dup uses on-device face detection to find every photo and video containing a specific person. You choose who to remove, review the matches, and delete them. All processing happens locally on your Mac, and faces are never uploaded anywhere. Note: face scanning requires a Mac with Apple Silicon (M1 or later).

Xcode DerivedData, npm/node_modules, Cargo target directories, pip caches, Homebrew caches, and more. Dup identifies safe-to-delete caches and shows you exactly how much space you'll recover.

Yes. Dup uses perceptual video hashing to compare what your videos look like, not their raw file data. It finds duplicates across different codecs (H.264, H.265, ProRes), resolutions (4K, 1080p, 720p), containers (MOV, MP4, MKV), and file sizes.

The free version lets you scan any folder and view all results. You can clean up to 250 MB of duplicates. Pro unlocks unlimited cleanup, Smart Select, and Folder Monitor.

Yes. Dup can scan your Photos Library, iCloud Drive, and the cloud folders you choose (Google Drive, Dropbox, OneDrive). Add them from the cloud buttons on the home screen.

Dup analyzes each photo for sharpness (blur detection), exposure (too dark or too bright), and resolution (tiny images). You can review results by issue type and batch-delete the worst photos. All analysis happens locally on your Mac.

Once configured, the duplicate monitor watches your selected folders using macOS file system events. You choose a rescan schedule: hourly, daily, or weekly. When new duplicates are detected, Dup notifies you via macOS notifications. The monitor is a Pro feature.

Dup combines four time signals (APFS birth time, last modified time, Spotlight's last-used date, and Spotlight's content-created date) to identify files you haven't opened in a while. The default is 1 MB or larger, untouched for at least 30 days, but every threshold is tunable. If a forgotten file also has a duplicate elsewhere, it gets a "safe to delete" badge. Everything runs locally: Spotlight queries and file metadata never leave your Mac.

It depends on where you bought. If you bought on this site, open Dup on your Mac and choose Manage Subscription: that opens the billing portal for the address you paid with, and you cancel there. If you bought through the Mac App Store, open System Settings > Apple ID > Media & Purchases > Manage Subscriptions > Dup Pro. Either way you can cancel at any time, and Pro continues until the end of the current billing period.

See what is actually on your disk

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

Dup needs macOS 13 or later, on a Mac with Apple silicon.

The duplicate video finder for Mac that matches 4K to 720p and MKV to MP4. The first 250 MB is free.

What Dup handles

What Dup sees

Video duplicates in any format

Compare, keep the best, undo

Remove Someone

Photos library and iCloud

More tools in the same app

Clean dev caches

Photo quality

Find forgotten files

Duplicate monitor