Fade In is real: its default length is 2.5 s and the renderer schedules an entry gain curve on the track node, both during playback and in the export.
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 Fades & Crossfade.
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 Fade & Crossfade Online
Audio Fade & Crossfade Online
Create fades and crossfades using the curves and export formats that exist in the current implementation.
Supported formats: WAV MP3 AIFF
What this tool actually does
Create fades and crossfades using the curves and export formats that exist in the current implementation.
Fade Out is real too: it defaults to 3.0 s and is applied as a descending gain curve before the end of the track.
The crossfade defaults to 4.0 s and never exceeds the shorter track: its length is clamped to the smallest of the two scaled durations and the curve generator builds the transition.
Curves are selectable: fades offer linear, exponential, s-curve and logarithmic, and crossfades offer equal-power, linear, exponential and s-curve, with a tension control that bends the shape.
Exports WAV, MP3 or AIFF: the master is rendered offline and encoded with encodePcmToWav, encodePcmToMp3 or encodePcmToAiff, then downloaded in the browser 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.
Crossfader Setup & Curves · ES
Crossfader Setup for Scratch and Turntablism: Cut-in, Cut Curve, Hamster Mode and Maintenance
Learn how to shape the crossfader cut curve, shorten the physical cut-in distance, use Hamster mode and maintain magnetic or optical faders (Academy guide in Spanish).
Read guide (ES)
Mixing & FX Transitions · ES
Creative Mixing and FX Transitions: Buildups, Drops, Sweeps and How to Avoid Overloading the Set
Learn to perform FX transitions in a DJ mix: filter sweeps, echo out, riser buildups and tricks to avoid listener fatigue (Academy guide in Spanish).
Read guide (ES)
Related tools
Complementary utilities to finish preparing your tracks.
Audio Trim & Split Online
Trim or split supported audio files with the exact editing and export behavior implemented by the current tool.
Open tool
Online Multitrack Audio Editor
Build quick DJ edits and layered arrangements in a browser-based multitrack workspace using only implemented editor features.
Open tool