Trimming is real and reaches the exported file: the renderer takes the start and the end of the region (trimStart and trimEnd) and schedules the source from there, so the download begins and ends inside the marked window.
Library
Reading your local library…
Smart DJ File Renamer.
Deterministic batch renamer for DJ library tracks based on metadata tags and audio analysis.
Load audio files, folders or playlists
Inspect metadata tags, detect messy names, and batch rename automatically or with manual inline edits.
Drop your audio tracks here or click to browse
Lossless (WAV, FLAC, AIFF) and Lossy (MP3, AAC, M4A) · Local Processing Only
Duplicate Detector & Safe Archiving.
Identify identical and alternate quality duplicate tracks in your collection.
Drag & drop files or folders
or click to browse
Detect exact duplicates (SHA-256) and acoustic matches with quality recommendations
←Home
DJ Database & Playlist Converter.
Convert Rekordbox, Traktor, VirtualDJ and Serato collections 100% locally.
Need to convert a USB flash drive in-place without duplicating audio?
Use DJ USB Converter In-Place →Source Library
or click to browse
Supports Rekordbox .xml, Traktor .nml, and VirtualDJ .xml
←Home
DJ USB Converter.
Transmute DJ USB drives between Pioneer, Denon Engine OS and Serato in-place without copying or duplicating audio files.
Looking to convert desktop collection files (.xml, .nml, .crate, .sql)?
DJ Library ConverterIntegrity Guarantee & Safe Backups
- Zero audio bytes duplicated: MP3, WAV, AIFF and FLAC files remain untouched in their original locations on the drive.
- Automatic pre-write backup: Before any database file is updated, an exact copy is verified and saved to Deckmatics Backups.
- Explicit access: The browser requests read/write permissions only when you explicitly click the button below.
DJ USB Storage Media
Transmutes existing DJ USB drives in-place without copying or duplicating audio files.
Connect or select your USB drive to inspect its DJ topology.
Pioneer, Engine Library and _Serato_ folders will be checked to provide cross-compatibility without touching your audio tracks.
Multitrack Editor.
BAR1.1.1
TIME00:00.000
BPM
SIG4/4
Snap
Grid
TRACKS (2)
1(0:00)
2
3
4
5
6
7
8
9(0:16)
10
11
12
13
14
15
16
17(0:32)
18
19
20
21
22
23
24
25(0:48)
26
27
28
29
30
31
32
33(1:04)
34
35
36
37
38
39
40
41(1:20)
42
43
44
45
46
47
48
49(1:36)
50
51
52
53
54
55
56
57(1:52)
58
59
60
61
62
63
64
65(2:08)
66
67
68
69
70
71
72
73(2:24)
74
75
76
77
78
79
80
81(2:40)
82
83
84
85
86
87
88
89(2:56)
90
Track 1
PanC
Volume-3.0 dB
Track 2
PanC
Volume-3.0 dB
MMASTER
BUSPanC
Volume0.0 dB
MASTER OUTPUT BUS|0.0 dB
Empty Project Session
Drag and drop audio files here or use the buttons below to import tracks.
Audio Trim & Split.
Drag & drop files or folders
or click to browse
Studio Audio Recorder.
High-fidelity audio recording for microphones, DJ USB sound cards or system audio with peak and RMS metering
IDLE
00:00.000
PEAK VUMETER
L
-inf
0 dB-3-6-12-18-24-36-48-60 dB
R
-inf
48.0 kHz · 24-bit PCM
Audio Trim & Split Online
Audio Trim & Split Online
Trim or split supported audio files with the exact editing and export behavior implemented by the current tool.
Supported formats: WAV MP3 AIFF
What this tool actually does
Trim or split supported audio files with the exact editing and export behavior implemented by the current tool.
Splitting works by marking the waveform: each click adds a cut point and the delete tool removes it, and those markers are drawn on the canvas and counted in the toolbar, so you divide the take visually while the export stays a single file.
The waveform is computed from the decoded buffer and painted on a canvas, so you see the peaks before you cut them.
Exports WAV, MP3 or AIFF: the format selector picks encodePcmToWav, encodePcmToMp3 or encodePcmToAiff, and the mix is re-rendered offline before encoding.
Everything runs in the browser: the audio becomes a Blob with its object URL and is downloaded locally, with no upload to any server.
Real-world use cases
What people actually solve with this converter before they play live.
Prepare tracks before a DJ set.
Fix or process files without opening a full DAW.
Keep the workflow focused on the specific task instead of a general-purpose editor.
Recommended Academy guides
Sample rate, bit depth, codecs and booth errors explained with rigour.
Sampling & Slicing · ES
Sampling Records: Clearance, Chop, Warp and Slicing
Sampling an already edited record takes both permissions and technique: master and composition clearance, transient chopping, warp, pitch and slicing to trigger the fragments (Academy guide in Spanish).
Read guide (ES)
Formats & Codecs
MP3 320 kbps vs FLAC on Club Sound Systems: Objective Comparison
Can you actually hear the difference between MP3 320 kbps and lossless FLAC on a festival or club PA? Psychoacoustics, transient impact and stereo phase analysis.
Read guide
Related tools
Complementary utilities to finish preparing your tracks.
Online Multitrack Audio Editor
Build quick DJ edits and layered arrangements in a browser-based multitrack workspace using only implemented editor features.
Open tool
Audio Fades & DJ Crossfade Tool: Smooth Transitions
Apply exponential, logarithmic, or linear Fade In / Fade Out curves, or create harmonic transitions between two DJ tracks.
Open tool