DupFinder v1.1.0

DupFinder 1.1.0: open source under the GPLv3, built on GitHub

Finding duplicates works exactly as in 1.0.1. What changes is the license and where the exe comes from.

• New license: GPL-3.0-only. DupFinder is now free software like the other burnersen tools: free for everyone, at home or at work. Whoever passes it on must include the complete source code under the same license. Versions up to 1.0.1 stay under the PolyForm Noncommercial License they were released with.
• Built by GitHub Actions: from this version on, DupFinder.exe is built and published by GitHub Actions from the source in this repository, no longer on the developer's PC. A dry run checks the whole build without publishing anything.
• File properties: the exe shows its name and version under right-click > Properties > Details.
• Code signing prepared: free code signing through the SignPath Foundation is applied for. Until it is active the exe stays unsigned. What would be signed and what DupFinder sends over the network (only the FFmpeg download): code signing policy.

Update: replace DupFinder.exe with the new one. Your decisions and the downloaded FFmpeg next to it stay.

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DupFinder.exe is not code signed, so Windows SmartScreen may warn. Code signing policy

DupFinder 1.0.1

What's new in 1.0.1

• Open-folder button now reliably reveals the file in Windows Explorer. The Explorer /select switch previously failed for paths containing spaces, and the Explorer window is now brought to the foreground.
• Keyboard review focus: after deciding a group, the active group is highlighted and centered correctly again (fixed an offset caused by the "already decided" drawer).
• Author / license headers added to all source files (PolyForm Noncommercial).
• README: added a Ko-fi support link and an invitation to report bugs and request features.

Download: grab DupFinder.exe below — a single file, ~7 MB, nothing to install. FFmpeg is downloaded automatically on first run.

DupFinder 1.0.0

DupFinder 1.0.0 — first release.

Content-aware duplicate video finder with a local web UI for Windows.

• Detects duplicates by a perceptual hash of sampled frames (also across different containers or re-encodes) and by exact byte-copy fingerprint.
• Review groups side by side in the browser; unwanted copies go to the Windows recycle bin (recoverable).
• FFmpeg is downloaded automatically on first run — nothing to bundle or install.

Run it with one or more folders:

DupFinder.exe "D:\Movies" "E:\Clips"

See the README for details. Source-available under the PolyForm Noncommercial License 1.0.0.