Doppel
Doppel: Auditable duplicate cleanup with precise matching, review controls, and Trash handling. Ranked #35 of 37 in Duplicate File Finders by our editors (4.9/10); pricing: Open source; best for mac users wanting auditable duplicate cleanup.
At a glance
- Editor score4.9 / 10
- PricingOpen source
- Best forMac users wanting auditable duplicate cleanup
- Paid fromFree
- Platform coverageMacos
- Facts checked19 Sep 2026
Where it wins
- SHA-256 and byte-by-byte verification for exact matches
- Priority rules, review, and keep-first duplicate selection
- Audit JSON export plus system Trash handling
Where it doesn't
- Limited to Apple Silicon macOS
- Scans only user-selected folders and nested subfolders
- Manual GitHub Releases updater and limited integrations
Our verdict on Doppel
Doppel is an open-source macOS application for finding duplicate files within one folder or across multiple user-selected folders. It is designed for Apple Silicon Macs and suits people who want local, reviewable cleanup without an account. Its workflow covers folder selection, duplicate-group review, file choices, Trash handling, and audit export rather than automatic permanent deletion.
Its strongest distinction is verification depth. Exact matches can be checked with file size, SHA-256, and byte-by-byte comparison. Doppel also supports metadata matching by filename, media duration, file kind, and extension, with those metadata matches intended for review rather than the same exact-match verification path. Search scopes include anywhere, between-folder, and within-folder scans. Keep Priority rules let users prefer files in selected folders or subfolders, while keep-first selection helps organize duplicate groups before action.
Doppel is a focused fit for users who want control over where scanning occurs and a record of cleanup decisions. Selected duplicates are moved to the system Trash, and the audit JSON export includes hashes, paths, verification status, and selections. The trade-off is narrow platform and ecosystem coverage: the application is limited to Apple Silicon macOS, scans user-selected folders and nested subfolders, and has GitHub Releases updating as its listed integration. The updater is manual and includes checksum and bundle validation. Users needing broader device support, wider integrations, or scanning beyond selected folder locations should choose a different duplicate-file workflow.
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Doppel pricing
Doppel fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Platform coverage | Macos |
| Scan locations | User-selected folders and nested subfolders |
| Match methods | File size, SHA-256, byte-by-byte comparison, filename, media duration, file kind, and file extension |
| File preview | Yes |
| Automatic selection | Yes |
| Recycle Bin / Trash | Yes |
| Folder exclusions | Not verified |
| Deployment | Desktop |
| Platforms | macOS |
| Integrations | 1 integrations: GitHub Releases updater |
| Pricing | Open source |
| Website | github.com |
| Facts checked | 19 Sep 2026 |
Doppel integrations
Doppel lists 1 integrations on its own site.
- GitHub Releases updater
Alternatives to Doppel
- AllDupA fully free Windows duplicate finder with broad matching and cleanup controls.9.0
- CzkawkaA free, scriptable duplicate finder for technical users across Windows, macOS, Linux, and Android.8.8
- Wise Duplicate FinderA Windows duplicate finder with free manual cleanup and Pro date-based selection.8.7
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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