Drop in a song and get a quick, free estimate of its key and tempo. The tool listens to a 90 second section you choose, then shows the two likeliest keys (like B Minor, or maybe D Major) and the BPM, with the half and double time values in case the beat feels slower or faster. It runs in your browser, so the file is never uploaded, and it needs no sign in and no credits. It is an estimate: for a precise result from the whole song with the time signature, the Camelot key and a saved report, run the full Key and BPM analysis.
Drop the audio file onto the page. The tool decodes it in your browser, listens to a 90 second section and shows the two likeliest keys and the tempo in a few seconds. If the first section is an intro without much harmony, move the slider to the chorus or the drop and analyze again.
Yes. The quick estimate is free, needs no sign in and uses no credits. The full Key and BPM analysis, which reads the whole song and adds the time signature, the Camelot key and a saved report, is a paid tool that uses credits.
It is an estimate from one 90 second section, so it is right most of the time on songs with a clear tonal center and a steady beat, and less sure on intros, very sparse tracks, songs that change key, or dense sound design. That is why it shows a second key and the half and double tempo. For the most precise result, run the full song analysis.
Keys that share most of their notes, like A minor and C major, or keys a fifth apart, can sound very close, especially in a short section. The first key is the likeliest and the second is the next best match, so if the first one sounds wrong when you play along, try the second.
A beat can feel like 70 BPM or 140 BPM depending on whether you count the kick or the hi hats, and tempo detectors can land on either. The main number is the likeliest one, and the half and double values are there so you can pick the one that matches how the song feels.
No. The file is decoded and analyzed on your device, and nothing is sent to our servers. Files up to 100 MB and 20 minutes are supported.
The full analysis reads the whole song with dedicated audio analysis on our servers and adds the time signature, the Camelot key for harmonic mixing, a saved result in your History and a PDF report. Use the quick estimate for a fast check, and the full analysis when you need the precise answer.
See the notes and chords in that key with the Scale and Chord Finder, change the key or tempo of the song with Change Pitch and Tempo, or take out the vocals with the Vocal Remover to practice or sing along.