Doppel review
Auditable duplicate cleanup with precise matching, review controls, and Trash handling.
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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.
Doppel pros and cons
- 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
Doppel fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update