The Most Accurate Free Key Detection for DJs

OpenKeyScan + Lexicon DJ

What is OpenKeyScan?

OpenKeyScan delivers 79.4% accuracy in independent tests — outperforming every free competitor on the market. Pair it with Lexicon DJ for seamless key analysis across your entire library.

Accuracy & Performance

Real numbers from an independent community test across 2,700+ tracks keyed by human ear.

Key Detection Comparison
Based on independent community tests (2025). Comparison of major DJ platforms and key analysis tools.
OpenKeyScan Free & open source
Accuracy
79.4%
79.4%
Speed
414/min
414/min
Rekordbox Built-in
Accuracy
72.2%
72.2%
Speed
388/min
388/min
Serato Built-in
Accuracy
64.2%
64.2%
Speed
216/min
216/min
Mixed In Key Paid license (~$58)
Accuracy
85.2%
85.2%
Speed
98/min
98/min
Source: Independent community test, 2,700+ tracks keyed by human ear. View full comparison on r/DJs →
4.2× faster
OpenKeyScan processes tracks 4.2× faster than Mixed In Key — 414 vs 98 tracks per minute.
$0
OpenKeyScan is completely free and open source. Mixed In Key charges ~$58 per major version.

One Seamless Workflow

OpenKeyScan handles the analysis. Lexicon manages your entire library. Together, accurate keys across every track — ready for whichever DJ software you use.

1

Analyze with OpenKeyScan

OpenKeyScan integrates directly inside Lexicon. Batch analyze your full library with top-tier key detection — no messing around with files or folders, you just need OpenKeyScan running in the background.

2

Organize in Lexicon

Fix tags, remove duplicates, organize playlists, generate cue points — all non-destructively. Your library, properly managed.

3

Sync to Your DJ App

Push everything — keys, tags, cue points, playlists — to Rekordbox, Serato, Traktor, Engine DJ, or VirtualDJ. One click.

Accurate Keys Are Just the Start

OpenKeyScan gives you the keys. Lexicon gives you a library that's organized, clean, and portable.

🧹

Clean Up Thousands of Tracks

Fix inconsistent artists, genres, titles, and artwork in bulk. Smart Fixes handle the repetitive stuff automatically.

🔀

Switch DJ Software Freely

Convert between Rekordbox, Serato, Traktor, Engine DJ, and VirtualDJ. Keep playlists, cue points, and beatgrids. 100% free.

📌

Generate Cue Points at Scale

Automatic cue points for hundreds of tracks in minutes. Drop detection, breakdowns, fade-outs — consistent structure across your library.

🗑️

Delete Duplicates Safely

Find duplicates by audio fingerprint. Keep the best quality version. Remove the rest without breaking a single playlist.

Try Both. Pay Nothing.

OpenKeyScan is free forever. Lexicon's library conversion is free too. See the difference for yourself.

Free Forever

OpenKeyScan

Key detection that rivals the paid tools

Download OpenKeyScan
Free Conversion

Lexicon DJ

Library management, cleanup & organization

Download Lexicon

Windows & macOS · No account required for OpenKeyScan · Lexicon free tier includes full library conversion