Everything about Duplicate File Finder

Use cases Duplicate File Finder covers

• You want to find duplicates on Mac without manually comparing file sizes and timestamps in Finder.
• The time has come to sort out duplicates piled up on your Mac through years of downloads, exports, and re-saves, which have become a storage problem.
• You’d like to consolidate several scattered folders into one without manually checking what’s already duplicated between them.
• You’re not confident enough in a Finder search or your own memory to manually track down every copy yourself.
• Two hard drives’ worth of photos got merged into one folder, and half of them are the same shots saved twice under different names.
• An external backup drive has years of overlapping copies from multiple past backups, and you can’t tell what’s actually unique.
• A project folder got duplicated ‘just in case’ months ago, and now nobody remembers which copy is current.
• A music or photo library has near-duplicates: the same shot edited twice, the same track ripped at two different bitrates, that a plain duplicate search won’t catch because the files aren’t identical, only similar.

Find duplicates FREE

This is the entry point, which refers to scanning. It checks the folders and drives you add and scans for exact file copies, duplicate folders, similar photos, and similar folders in one action, before you choose what to act on.

Here, you are supposed to select or add a directory you’d like to work with. After you do so and click the Find duplicates button, a chart will appear, divided to duplicate types.

All duplicates FREE

When scanning is done, you will move to the next level, called All duplicates. It lists every exact copy found and lets you filter by file size, date, name, and type.

The tool shows all the file categories here, from .dmg files and documents to audio and video files. To list items by file category, such as pictures, movies, music, documents, and archives, just open the All duplicates dropdown.

It’s like a quick result page, where you can delete duplicates easily. By ‘easily,’ I mean you are free to select files out of duplicates found in your added directory without digging in the Library folders on your own. For more convenience, there is also an auto-selection option.

Smart Select PRO

This is a paid Pro feature, which stands for bulk selection. You can customize it with rules:

• Always Select for named folders,
• Never Select for protected ones, and
• Deep Select rules based on path, date, files, name, and other criteria.

It’s usable in the following three modules: Duplicate folders, Similar photos, Similar audio. It only pre-ticks checkboxes for you to review; it never deletes any file on its own.

Duplicate folders Free view Removal: Pro

If you have identical folders, the tool will flag them. This applies to folders whose contents match another folder’s, even when the files inside have different names.
Viewing results and redirecting to a directory is free; removing duplicate folders requires Pro.

Similar photos FREE

In this section, you’ll see similar images of different formats: jpg, heic, etc. The main idea is to catch look-alike or edited images, burst shots, re-exports, and slightly cropped versions. The mechanism involves a similarity slider, set to Medium by default.

Since this is judgment-based rather than an exact match, review these results more carefully than a plain duplicate.

Similar audio FREE

This feature finds and lets you remove the same track saved at different quality levels or bitrates, files that are audibly the same song but not byte-identical. Before removing, you can listen to the tracks without leaving the tool.

Similar folders Free view Removal: Pro

This module identifies folders that share some duplicates with another folder but also contain unique files, requiring at least two shared duplicates to trigger a match.

When you select similar folders, they appear in the right panel with their paths. From there, you can see the duplicate and different files and folders side by side. After reviewing, the Pro version lets you select and remove unnecessary items.

Merge folders PRO

By using this functionality, you may consolidate folder contents three ways:

• two folders into one,
• a set of similar folders together, or
• several scanned folders at once.

Unique files are copied over; files that already exist in both locations aren’t duplicated. The action is simple: you choose the source and destination folder (or another folder), then you see a preview and confirm.

Select by folders PRO

This window breaks results down per folder, showing cross-folder duplicates, in-folder duplicates, and unique files for each one. Starring a folder protects its copies and targets the matching duplicates elsewhere for removal.

The figures next to each folder mean the number of duplicates present in other folders. By clicking a folder, it’s possible to review duplicates with their paths and remove duplicates from a folder you choose.

Compare folders Free view Removal: Pro

Here, you can compare two specific folders and split the results into shared duplicates and files unique to each side, which is useful for deciding which of two similarly named project or backup folders to keep.

Compare files FREE

The last one is a narrower tool to check whether two specific files are byte-identical in size and content, not just by name or file size. The verdict will be that the files are different or duplicates, with no option to remove.

What Duplicate File Finder can’t do

To get the most from the tool, it’s important to know where it stops being the right fit:

• It doesn’t download cloud-only files to check them. iCloud or Dropbox files that haven’t synced locally aren’t part of the scan. It reads what’s on the drive.
• It isn’t a general Mac cleaner. No junk-file, cache, or large-file cleanup beyond duplicates specifically.
• It can’t identify a [em]’true original'[/em] among exact copies. Byte-identical files are, by definition, indistinguishable to the app: you choose which to keep, or set a rule to decide for you.
• Single-photo review runs one image at a time, not side by side, which slows down a large photo cleanup session.
• It can take longer with terabyte-scale libraries; a folder-by-folder scan works better than pointing it at an entire media server at once.

Reddit threads

App Store reviews

What’s free and what’s paid in Duplicate File Finder

Gemini 2: For casual automated duplicate cleanup with library support

• Its trial requires a card upfront and starts charging after 3 days.
• A Duplicate Monitor watches a chosen folder for new duplicates over time.
• A deletion option that replaces a file with a hard link instead of removing it outright.
• It deals with almost all file types, organized by tab, similar to Duplicate File Finder’s layout.
• In testing, it found about 3.76 GB fewer duplicates than Duplicate File Finder on the same test set and missed several file types, including .docx, .gif, .txt, .zip, and .png.
• There is a duplicate folder tab, but with no folder merging or similar folder spotting.
• Settings are complete, with a Skip List and multiple deletion methods, but with fewer default automation rules than Duplicate File Finder.

dupeGuru: For technical users to handle more complicated scenarios

• Free and open-source app, aimed at technically confident users who don’t mind a more hands-on process.
• Results display as one flat list with no grouping; there’s no preview, and the Mac build hasn’t been released since July 2022.
• Fast: the large set scanned in about 3 seconds, ahead of both other tools on raw speed.
• Deletion options vary: Trash or permanent delete, plus the option to replace a duplicate with a hard link or symbolic link instead, or copy/move it elsewhere.
• Settings run deep: a similarity threshold, minimum/maximum size filters, regex-based filtering, and a custom command field.
• It can’t add a Photos Library from its interface; dragging one in gets treated as a plain folder, and deleting from it risks breaking the library.
• Doesn’t really have auto-select in the way the other two define it.
• It has no equivalent for duplicate folders, similar folders, or folder merging.
• It lacks the file preview, and its overall design is obsolete.

Duplicate File Finder: For all-purpose duplicate and folder organizing

• The free version removes duplicates, not only finding them, so it’s the one that doesn’t ask you to pay before proving it works.
• Beyond file duplicates, exact files, similar photos, and similar audio, the tool also organizes: in-folder duplicates, whole duplicate folders, and folder merging.
• It processes all file types, from docs and archives to images and tracks in any format.
• It offers deep settings: scan scope, scan parameters, auto-select flexibility, a Skip List, choice of deletion method, and file-type limits.
• Duplicate findings are 3.87 GB, which is the most solid.
• Performance drops on multi-terabyte libraries.