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Smart Duplicate Finder, published by Robertas & Claude, is currently at version 1.6, with five versions released so far. It is a safe, portable duplicate file finder in the file management and disk cleanup category, designed to help users identify redundant files without any risk of data loss, since by design it never deletes user files. The tool finds duplicate files by content using MD5 hashing and locates visually similar photos through perceptual hashing, including support for iPhone HEIC and AVIF formats that Windows itself often cannot open. Its two-phase scan presents results through a guided candidate dialog with per-family time estimates, and findings are colour-grouped by file family in a colour-coded Excel report, allowing users to clean up at their own pace. Right-clicking a result lets the user open the file, open its folder, or copy its path, though opening is deliberately disabled for executable files as a safety measure. The only optional deletion targets invisible system junk such as Thumbs.db and .DS_Store files, which are verified by content signature before removal. The report also identifies which copy is most likely the original and explains why, drawing on what file names, folder locations, and dates reveal—for example, noting that other copies are named as copies or sit deeper in folders—and where nothing distinguishes the files it states this plainly instead of guessing. Typical use cases include reclaiming disk space, organizing photo libraries, and even distinguishing real packages from pip's vendored copies in Python virtual environments. The software has been proven on a three-million-file endurance test, with oversized reports split into numbered files rather than truncated. One executable serves all UI languages—English, Lithuanian, Russian, and German, switchable in-app—while optional portable mode keeps all working files next to the exe.
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