Key, Camelot, and tempo in one pass
BPM and Key Finder
Your audio is analyzed in this browser. It is never uploaded.
Check the result by ear. Relative major and minor keys share notes, and one groove can support half-time or double-time readings.
Supported audio files
Choose one MP3, WAV, FLAC, AAC, OGG, or M4A file. Format support depends on the audio decoder built into your browser; current Chrome and Edge can read the formats listed here.
The file is decoded and analyzed on your device. This key and BPM finder does not send the recording to a server.
When key detection can be wrong
Live recordings, tempo changes, dense harmony, key changes, weak drums, and vocal-heavy or very short clips can produce an uncertain answer. Relative major and minor keys use the same notes, so a song key finder can reasonably prefer either one.
Use a clear section with both rhythm and harmony, then confirm the root note and pulse by ear before mixing or transposing.
How the browser finds key and tempo
The key finder music analysis measures energy around musical-note frequencies, groups those notes into twelve pitch classes, and compares the resulting chroma profile with major and minor key profiles. The tempo analysis compares repeating onset intervals in the audio.
The result includes the key name, major or minor mode, its Camelot wheel code, BPM, and the related half-speed and double-speed interpretations.
BPM and key finder FAQ
What key is this song in?
Choose the audio file above. The browser estimates the root note and whether the track sounds major or minor, then shows the matching Camelot code.
Is a key and BPM finder exact?
No. It estimates both values from the recording. Tracks with changing tempo, modulation, dense harmony, or an unclear pulse need an ear check.
Is this also a BPM key finder?
Yes. “BPM key finder,” “key and BPM finder,” and “key and tempo finder” describe the same two results shown here.
Does this song key finder upload my music?
No. Decoding and analysis run in your browser. The selected audio file stays on your device.
Why are two BPM values both reasonable?
A listener can count the same groove at half-time or double-time. The main BPM is the detector’s preferred pulse; the page also shows both related interpretations.