Free tool · no sign-up
Find any song’s tempo and key.
For DJ mixes, karaoke, reels and practice. We measure the beat and the notes in the song itself, right in your browser.
Know your song inside out? Hear it sung in your own voice.
Make my song, free Your own private voice · 2 songs free to make and hear · no cardHow it works
- Choose a song file.
- Wait a few seconds while we listen to it.
- Read the BPM and key, plus the related key that mixes well.
Questions
How accurate is the BPM?
For songs with a steady beat it is usually within 1 BPM. Some songs can read as half or double the tempo; we show both so you can pick the one that feels right.
How is the key worked out?
We measure how much of each of the 12 notes the song uses and compare that with the patterns of major and minor keys. Songs that change key or rely on Indian ragas may read as their closest Western key.
Is my song uploaded anywhere?
Your file never leaves your device: the work happens in your browser, so nothing is uploaded.
What is the relative key?
Every major key shares its notes with one minor key (C major and A minor, for example). Songs in related keys usually blend well in a mix or medley.