BPM & Key Finder
Find the BPM, key and relative key of any song — or of several at once.
How to find the BPM and key of a song
- Choose one or more songs
Drop MP3, WAV, M4A, FLAC files or videos — as many as you like.
- Read the results
Each song gets its tempo in BPM, its key, its relative (alternate) key and its Camelot code for harmonic mixing.
- Copy or keep going
Copy the results, or add more songs. Everything stays on your device.
Questions
Is it really free, with no sign-up and no watermark?
Yes, completely. There's no sign-up, no login, no watermark and no daily limit: just open the page and start. It works in your browser on any computer, phone or tablet with nothing to install, and your files are never uploaded — everything happens on your device.
What key is my song in — and what is the alternate key?
The key is the scale the song is built on, like A minor. Every key shares its notes with one other key, its relative: A minor and C major use the same notes. Songs often sit between the two, so both are shown — the alternate key is the relative one.
What do half time and double time mean?
A beat can be counted at half or double the speed: a song at 140 BPM can also be felt at 70. If the BPM looks off by a factor of two, use the half time or double time number.
What is the Camelot code?
DJs use the Camelot wheel to mix songs whose keys sound good together: songs with the same code, one number apart, or the same number with A and B swapped mix smoothly.
How accurate is it?
For songs with a steady beat and clear harmony it's usually spot on. Live recordings with changing tempo, songs that change key, and very sparse or atonal music are harder; there the result is the song's overall tempo and most likely key.