Key capabilities
- Directory picker with a webkitdirectory fallback
- Size, sample, and full-BLAKE3 scanning stages
- Byte-for-byte verification after matching hashes
- V1 creates reports and never deletes or moves files
Duplicate File Finder
Scan a selected directory, narrow candidates by size and samples, then confirm duplicates using full BLAKE3 and byte-for-byte comparison before exporting a cleanup report.
Directory enumeration, reads, hashing, and byte comparison stay local. Paths, hashes, and file contents are never uploaded.
A standard directory handle is unavailable here, so a compatible directory file picker will be used.
Source and filters
0 files remain after filtering
Choose a directory and run a scan to see duplicate groups.
About Duplicate File Finder
Confirm duplicate files locally without deleting anything. Scan a selected directory, narrow candidates by size and samples, then confirm duplicates using full BLAKE3 and byte-for-byte comparison before exporting a cleanup report. The core workflow is designed to run in your current browser.
Useful for
- Find duplicate groups that consume the most space
- Check backup folders for redundant copies
- Organize photo, video, and audio libraries
Frequently asked questions
Is Duplicate File Finder free to use online?
Yes. Duplicate File Finder opens in a modern browser and does not require desktop software installation.
What is Duplicate File Finder useful for?
Common use cases include Find duplicate groups that consume the most space; Check backup folders for redundant copies.
Is my input or file uploaded?
The core processing workflow is designed to run locally in the browser. Key capabilities include Directory picker with a webkitdirectory fallback, Size, sample, and full-BLAKE3 scanning stages, Byte-for-byte verification after matching hashes; account, comments, and anonymous analytics may still create normal site requests.
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