How to Find and Delete Duplicate Tracks in Rekordbox Without Losing Cues or Playlists

You search for a track in the booth and get three results. Same title, same artist, slightly different file names. One has your cues, one has a wrong grid, one points at a file on a drive you no longer own. You pick the wrong one, the hot cue you rely on is not there, and the mix that worked at home falls apart in front of a crowd.

Duplicates creep into every rekordbox library that has lived through a few laptops, a Beatport habit, some promo pools and at least one panicked re import. Cleaning them up is worth doing, but done carelessly it is also the quickest way to wipe years of cue points and playlist work. This is the order I use, from the safe checks to the tools that do the heavy lifting.

Why does rekordbox end up with duplicate tracks?

Rekordbox does not treat a song as a song. It treats each file path as a separate track entry, and cues, grids, memory points and playlist membership all hang off that entry. So the same tune becomes two tracks whenever it exists in two places or two versions.

The usual causes:

• Buying a track again in a different format, for example a WAV after a promo MP3
• Importing the same folder twice after moving it, so the old entries still point at the old path
• Promo pools and label downloads that arrive with slightly different titles or remix tags
• Syncing iTunes or Apple Music playlists that reference copies stored elsewhere
• Restoring a library backup on top of a collection that had already changed

Knowing the cause matters, because a true duplicate (identical audio in two places) is handled differently from a different version that only looks like a duplicate, such as an original mix and an extended mix.

Step 1: back up before you delete anything

Every cleanup method below changes the database that holds your cue points. Before touching it, use File, Library, Backup Library in rekordbox and save the backup to a different drive from your music. If you export to USB, also keep your current gig stick untouched until the cleanup is done and tested, so you still have a working set of cues for the weekend.

Close rekordbox fully before running any third party tool that writes to the library. Tools that edit the database while rekordbox is open can corrupt it, and the developers of the open source fixers say so clearly in their own instructions.

Step 2: find duplicates manually inside rekordbox

For a library of a few thousand tracks, a manual pass is often enough. Go to Collection, right click the column header and switch on columns for Artist, Title, Date Added, Bitrate and File Type, plus the column that shows each file's location (names vary slightly between versions). Sort by Title, then scan for neighbours that match. With the location visible you can see at a glance which copy lives in your main music folder and which one sits in Downloads or on an old drive.

Then decide which entry to keep using one question: which copy holds the work? Check each candidate for hot cues, memory cues and a corrected grid. In most cases you keep the entry with your cues, even if the other file is higher quality, then deal with quality separately in step 4. A missing file, shown with an exclamation mark in the collection, is usually the stale entry and the easiest to remove.

Removing a track from the Collection takes its entry out of the rekordbox database. It is not the same as deleting the audio file from your drive, so tidy the files on disk as a separate, deliberate step once the library looks right.

Step 3: use a tool for large libraries

Past roughly ten thousand tracks, sorting by title becomes slow and misses near duplicates with different tags. That is where dedicated tools help. Most of them use audio fingerprinting, which compares the actual sound rather than the file name, so they catch the same track saved under two different titles.

• Rekordbox Collection Tool (RCT) is a paid macOS app that fingerprints the collection, finds duplicates and is designed to keep cues, loops, grids and playlists intact when it merges them. Its developer lists support for rekordbox 6 and 7.
• rekord.cloud offers a duplicate track scanner that fingerprints your tracks, lets you choose which copy to keep and updates the affected playlists. It also has a health check that flags duplicates inside playlists.
• Open source projects on GitHub can read rekordbox's database directly to find duplicates and leftover entries. They are free and transparent, but they expect you to be comfortable with backups and the occasional command line step.

Whichever tool you pick, run it in report mode first if it has one. Read the list of proposed deletions before letting it change anything, and spot check a handful of tracks you know well.

Step 4: keep the cues, upgrade the file

The awkward case is when the copy with your cues is a 320 MP3 and the copy without cues is a WAV you bought later. You want the better audio and the old cues. There are two clean ways to get there.

The first is relocation. If the files are the same audio from the same master, you can replace the MP3 on disk with the WAV and use rekordbox's relocate function to point the existing entry at the new file. The cues stay attached to the entry. Check the grid and the first cue afterwards, because a different encode can shift the start of the audio by a few milliseconds and leave cues slightly early or late.

The second is to let a tool such as RCT transfer the cue data from one entry to the other, which is safer when there are many tracks to upgrade. In both cases, play the track on the decks and confirm that the first beat lands exactly on the grid before trusting it in a set.

What about duplicates inside playlists?

Playlist duplicates are a different problem: the same entry added twice to one playlist, which is harmless for the library but annoying in the booth. Sort the playlist by Title and remove the repeats from the playlist only. Be careful not to remove from Collection at this point, because that would delete the entry and its cues from every playlist at once.

Intelligent playlists help here too. If you build crates by genre, energy or My Tag rather than by dragging tracks around, you end up with fewer accidental copies in the first place.

How do I stop duplicates coming back?

• Keep one master music folder and import only from there. Downloads, promo pools and mail attachments get moved into the master folder first, then imported.
• Rename and tag new files on the way in, with consistent artist and mix names, so near duplicates are obvious when you sort.
• Turn off automatic imports from other apps unless you actively use them.
• After moving music to a new drive, relocate the existing entries instead of importing the folder again.
• Run a duplicate check every few months, before a busy run of gigs rather than the night before one.

What to do this week

Back up your library to a separate drive, then spend thirty minutes sorting the Collection by Title with file location and Date Added visible. Remove the obvious stale entries that point at missing files. If you find more than a few dozen real duplicates, trial a fingerprinting tool in report mode and compare its list with what you found by hand.

Finish by exporting a fresh USB, testing ten of your most played tracks on the decks or in performance mode, and only then retiring the old stick. A clean library is not about tidiness. It is about knowing that the track you load is the one with your cues on it.

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