Find the key & BPM
of any song.
Drop in a track and get the key, Camelot code and tempo instantly — free.
Drop a song to find its key & BPM
MP3 or WAV · or
Free · No account · Instant
A free key and BPM finder
Knowing a song's key and tempo is the starting point for almost everything — writing a topline that fits, dropping in a sample that's in tune, layering a second beat, or mixing two tracks so they blend. This tool detects both: drop in an MP3 or WAV and it reads the musical key (with its Camelot code for harmonic mixing) and the BPM. It's free, instant and private.
How to find a song's key and BPM
- Drop in your song — drag an audio file onto the box above, or browse to pick one.
- Read the result — you'll get the key, its Camelot code, and the tempo in BPM in a few seconds.
- Play and tap — use the built-in player to listen, and tap along on the beat to confirm the tempo.
What's the Camelot code for?
The Camelot wheel labels every key with a number and a letter — A for minor, B for major. Tracks whose codes sit next to each other (or share a number) mix harmonically, so DJs use it to build smooth, in-key transitions. If you produce, it's a quick way to find samples and loops that sit in the same tonal world as your song.
Why detection is sometimes off
Automatic key and tempo detection are estimates. Clear, tonal, four-on-the-floor material reads reliably; ambiguous, atonal or rubato passages can trip it up — and a track at 70 BPM can read as 140 (a doubled tempo) or vice-versa. The confidence dot, the player and the tap-tempo button are there to help you sanity-check by ear.
Key & BPM finder — FAQ
How do I find the key and BPM of a song?
Drop an MP3 or WAV into the finder above. In a few seconds it shows the musical key, its Camelot code and the tempo in BPM.
Is it free?
Yes — completely free, no account, analyse as many songs as you like.
How accurate is it?
Key and tempo are estimates. They're accurate for most tonal, rhythmic songs, but ambiguous material can be off — so there's a confidence indicator, a player and a tap-tempo option to check the BPM by ear.
What files can I use?
MP3 and WAV, plus most common audio formats (m4a, aac, flac, ogg). A full song or stereo mixdown works best.
Want the background? Read how to find a song's key and BPM on the Loopin blog, or master a track free when it's recorded.
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