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 Loopin Key & BPM Finder. In a few seconds it shows the musical key, its Camelot code and the tempo in beats per minute.
Is the key and BPM finder free?
Yes. It is completely free with no account or sign-up. You can analyse as many songs as you like.
What is a Camelot code?
The Camelot wheel is a DJ-friendly way to label keys for harmonic mixing. Each key gets a number and a letter (A for minor, B for major), so tracks with adjacent codes mix together smoothly. The finder shows the Camelot code next to the key.
How accurate is automatic key detection?
Key and tempo detection are estimates. They are accurate for most clearly tonal, rhythmic songs, but ambiguous or atonal material can be off — which is why the tool shows a confidence indicator and includes a player and a tap-tempo button to double-check the BPM by ear.
What file types can I analyse?
MP3 and WAV, plus most common audio formats (m4a, aac, flac, ogg). Use a stereo mixdown or full song for the best result.
Using the result
The finder reads the audio file you give it; it doesn't look songs up by name. Once you have the key and tempo:
- Mixing two tracks? Check which keys sit together in the key compatibility chart, and learn the wheel in what is the Camelot wheel.
- Need it in another key? How to transpose a song covers moving a song or a sample to fit your voice or another track.
- Tempo reads double or half? See why BPM sometimes reads double and how to tap the tempo to confirm it.
Want the background? Read how to find a song's key and BPM on the Loopin blog, check a finished track's loudness with the free LUFS meter, or master a track free when it's recorded.
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