Most dedupe tools treat your DJ library like a folder of loose MP3s. MLD knows which files your playlists reference and re-points them before anything gets touched.
Generic duplicate finders (dupeGuru, Gemini, Duplicate Cleaner) don't know anything about Rekordbox, Serato, or VirtualDJ. They'll happily recommend deleting `Track.mp3` when it's the exact file your 2024 set references — and then your playlists turn into a wall of red icons. They also don't understand that `Track.mp3` at 320 kbps and `track(1).mp3` at 192 kbps are the *same song you've already listened to a thousand times* and you want to keep the 320.
Supported today
Rekordbox · Serato DJ · VirtualDJ (incl. Favorite Folders) on Windows 10+ and macOS (Apple Silicon + Intel).
The difference isn't the hashing — every dedupe tool hashes files. The difference is DJ-library awareness. MLD reads Rekordbox master.db (including encrypted 6+), Serato crates, and VirtualDJ database.xml, and knows which file is referenced by which playlist. That's what lets it safely pick a winner, re-point playlists first, and move losers to Trash without breaking a single set.
Those tools treat your library as loose files. MLD is DJ-aware: it reads Rekordbox, Serato, and VirtualDJ databases, knows which files are referenced, and re-points playlists BEFORE moving files. Generic tools can't do that.
MLD is built specifically for DJ libraries — Rekordbox, Serato, VirtualDJ. It will scan any music folder, but its playlist-safe promise only applies to those three apps.
Yes. Everything runs locally — no cloud, no uploads. The local database is encrypted with SQLCipher.
Yes — every group is reviewable. Move the KEEP marker with one click, preview the actual audio, or run the group's Quality Check (0–10 per copy) and let the scores settle it.
Scanning is read-only. Writes happen only after you confirm each group, files move to Trash/Recycle Bin (never hard-deleted), and playlists are re-pointed to the kept copy first. At least one copy in every group is always kept, and any borderline match lands in a separate review list MLD never removes on its own.
Every copy carries its own match-score badge — an exact match or just a close one — next to its bitrate and quality, so you spot the true twin at a glance instead of trusting one verdict for the whole group.
Free tier covers scanning and detection. Pro is a one-time lifetime license — paid once, no subscription. Current founding pricing is on the homepage.
