Mixed In Key is harmonic-mixing software that detects the musical key and energy of tracks for DJs and producers.
The DJ standard for accurate key detection and Camelot-wheel harmonic mixing across a full library.
UtilitiesPaid
Utilities
Paid
Best Tools[ 6 tools ]
Best BPM & Key Finder Tools
The best tools to find a song's BPM and musical key — for DJs, producers, and remixers who need accurate tempo and key detection.
Knowing a track's tempo and key is essential for DJing, remixing, mashups, and matching samples. Some tools look it up in a database instantly, others analyze your own audio files, and a few are built into harmonic-mixing workflows for DJs. Accuracy and workflow matter more than features here — a wrong key suggestion is worse than none. This list covers the fastest lookups, the most accurate analyzers, and the DJ-focused standards.
ToolCategory · Pricing · Signal
TuneBat is a web-based music database and analyzer for finding the key, BPM, and audio attributes of songs.
A fast, free web database for BPM, key, and Camelot values on millions of released tracks.
UtilitiesFreemium
Utilities
Freemium
GetSongBPM is a free web database and tempo finder for looking up the BPM and key of songs.
A free, no-frills web lookup for a song's tempo and key — quick answers without an account.
UtilitiesFree
Utilities
Free
KeyFinder is a free, open-source musical key detection tool for DJs interested in harmonic mixing.
A free, open-source app that analyzes your own audio files for musical key.
UtilitiesFree
Utilities
Free
Free in-browser analyzer that detects the BPM and musical key of any audio file, privately on your device.
A simple web tool to check a track's key and BPM in seconds.
UtilitiesFree
Utilities
Free
Free online tap-tempo tool: tap along to any track to measure its BPM instantly.
Tap along to find a tempo by hand — the fastest way to get BPM with no software or files.
UtilitiesFree
Utilities
Free
Database lookup vs. file analysis
If the song is a known release, a database tool like TuneBat or GetSongBPM gives you BPM and key instantly — no file needed. If you have your own audio (a bootleg, a stem, your own track), you need an analyzer like Mixed In Key or KeyFinder that reads the file. DJs preparing a library usually run analysis across their whole collection; producers often just need a quick lookup.
Why DJs trust Mixed In Key
For harmonic mixing, key accuracy is everything, and Mixed In Key built its reputation on being reliable across large libraries plus the Camelot wheel notation that makes key-matching simple. Free tools are great for one-off checks, but if you're mixing sets and want consistent, trustworthy key data across thousands of tracks, a dedicated analyzer pays off.
Questions
Frequently asked
How do I find the BPM of a song?
For a released track, look it up in a database like TuneBat or GetSongBPM. For your own file, analyze it with a tool like Mixed In Key. To do it by ear, tap along in time with a BPM tapper.
What's the best tool for finding a song's key?
Mixed In Key is the most trusted for accuracy and DJ use. For free options, TuneBat and GetSongBPM cover released songs, and KeyFinder analyzes your own audio files.
How accurate is automatic key detection?
It's very good but not infallible — ambiguous or modulating songs can trip up any analyzer, and free tools vary more. For critical DJ or production work, a dedicated tool like Mixed In Key is worth the reliability.
What is the Camelot wheel and why does it matter?
The Camelot wheel is a DJ-friendly notation (like 8A, 8B) that makes harmonic mixing easy — tracks with adjacent numbers mix well. Mixed In Key and TuneBat display Camelot values alongside the standard key.
Do I need to pay for a BPM and key finder?
No. TuneBat, GetSongBPM, KeyFinder, KeyBPM, and BPM Tapper are free. Paid tools like Mixed In Key add accuracy, batch analysis, and DJ-focused features that matter most when working with large libraries.