Skimrr
The best duplicate photo finder apps in 2026
Five tools that find duplicate photographs, compared on things you can check yourself: where they run, what they cost, and what happens to the files they remove.
We make one of these, so read the table rather than our opinion. Every column is a fact you can verify on the makers' own sites.
| Tool | Platforms | Price | Runs locally | Reversible | Open source |
|---|---|---|---|---|---|
| Skimrr | macOS · Windows | $19.99 · once | Yes | Yes | No |
| PhotoSweeper | macOS | One-time | Yes | In part | No |
| Gemini 2 | macOS | Subscription | Yes | In part | No |
| dupeGuru | macOS · Windows · Linux | Free | Yes | In part | Yes |
| Czkawka | macOS · Windows · Linux | Free | Yes | No | Yes |
The five, one by one
Skimrr
macOS · Windows · $19.99 · once
Ours, so weigh it accordingly. A photo cleaner for macOS and Windows that never uploads anything and never deletes anything: discarded pictures go to an internal trash and one button puts every one of them back. Scanning and reviewing are free; a licence is needed only to move files. Best for someone who keeps photographs in folders rather than inside a catalogue, and who wants the same tool on both systems for one payment. Weakest on cropped and rotated duplicates, which it does not yet find.
PhotoSweeper
macOS · One-time
A Mac-only tool with roughly a decade of refinement behind it, built specifically for photographers with large libraries. It reads Apple Photos and Lightroom libraries directly rather than asking you to export first, offers several comparison modes, and gives fine control over which copy survives. If your pictures live inside Apple Photos, this is the obvious pick. It does not run on Windows.
Gemini 2
macOS · Subscription
MacPaw's duplicate finder, and the most polished interface of the five. It handles all file types rather than photographs specifically, and it is sold by subscription, either on its own or inside Setapp. Good if you want one tool for every kind of duplicate on a Mac and do not mind a recurring charge. Less focused than a dedicated photo cleaner.
dupeGuru
macOS · Windows · Linux · Free
Free, open source, and available on macOS, Windows and Linux. Its picture mode compares images rather than filenames, and unlike most tools here it finds duplicates that have been resized or rotated , something Skimrr cannot do. The interface is plain and the results are presented as a list rather than as photographs. Excellent value, and the right answer if rotated duplicates are your problem.
Czkawka
macOS · Windows · Linux · Free
Free, open source, cross-platform and fast, with more scan modes than anything else here: duplicates, similar images, similar videos, empty folders, broken links and temporary files. It is a file cleaner that happens to handle photographs, and its interface expects a certain comfort with technical tools. Nothing to pay, nothing gated. Removals are not reversible from inside the app.
Where Skimrr is behind
dupeGuru finds duplicates that have been rotated or heavily cropped; Skimrr does not yet, its fingerprint compares images as framed. PhotoSweeper has a decade of refinement behind it and reads Apple Photos libraries directly, which Skimrr deliberately refuses to do. And Skimrr is not code-signed yet, so both systems warn on first launch.
How to choose
If you are at home in technical tools and want to pay nothing, take Czkawka or dupeGuru: they are genuinely good and genuinely free. If your pictures live inside Apple Photos on a Mac, PhotoSweeper reads that library and Skimrr will not. Skimrr is the answer to a narrower question: one payment, both systems, nothing ever uploaded, and every file you discard recoverable with a single click. No other tool here does all four, which is exactly why it was written.
Questions people ask
- Do duplicate photo finders upload my pictures?
- Some do. Tools that offer cloud sync or AI analysis often send at least thumbnails to a server, and some send full images. The four alternatives listed here all analyse locally, as does Skimrr. If a tool asks for an account before it will scan a folder, that is the question to ask before installing it.
- Is a free one good enough?
- Often, yes. dupeGuru and Czkawka are genuinely capable and cost nothing. What you trade is polish: results as lists rather than photographs, fewer safeguards, and no undo in Czkawka's case. If you are comfortable with that, save your money.
- Will it delete a photo I wanted to keep?
- Every automatic judgement about a photograph is a guess, so the real question is what happens when the guess is wrong. Ask whether removals can be undone. Skimrr moves files to its own trash with a record of where each came from; most tools rely on the system trash, which is recoverable but messier.
- Does any of this work with iCloud photos?
- Only for pictures actually present on the disk. When macOS is short of space it replaces synced files with placeholders that hold no image data, and reading one triggers a download that can stall a scan for minutes. Skimrr detects these and offers to fetch them; most tools simply hang. If your library is in iCloud, download the folder in Finder first.