Files & Archives · Duplicate Finder
Find duplicate files without deleting anything
Quick answer
Choose folders in Toolfox → Duplicate Finder. Files are confirmed identical by SHA-256 of their full content, not just size or name, and grouped with the space you could free. Toolfox never deletes; you review and act in your file manager. It runs entirely on your computer (Mac, Windows or Linux). Files are never uploaded.
How to do it
- Open Duplicate Finder and choose one or more folders.
- Optionally ignore small or hidden files.
- Click Find Duplicates.
- Review groups and use Reveal to decide what to keep.
Options you can set
- Ignore files smaller than
- Include hidden files
- Skip app bundles and libraries (.app, .photoslibrary…)
Good to know
- Duplicates are confirmed by SHA-256 of the full content; equal size alone is never treated as a match.
- Symbolic links aren't followed. Toolfox never moves or deletes files. Use Reveal to act on results yourself in your file manager.
Duplicate Finder FAQ
How does it know files are duplicates?
It compares sizes, then a quick hash, then a full SHA-256 of every candidate. Only byte-identical files are grouped.
Will it delete my files?
Never. It only reports.
Is Duplicate Finder in Toolfox free?
Yes. Duplicate Finder is one of 57 tools in Toolfox, a free app for Mac, Windows and Linux with no account, ads, limits or watermarks.
Does Duplicate Finder upload my files?
No. Toolfox processes files on your own computer and works offline; your files are never uploaded.
More files & archives tools in Toolfox
Get Duplicate Finder and 19 more tools.
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Updated 2026-10-18 · Toolfox v0.2.1