Key & BPM Finder

A YouTube or Spotify page link does not give this browser tool access to the song audio. Open the song and use Tap tempo, or paste a public direct audio-file URL that supports browser CORS. Microphone and browser-tab capture are not available on this page.

Yes. The result includes the estimated key and scale plus its Camelot wheel code, such as A minor / 8A. Camelot codes help DJs compare nearby harmonic keys, but the detected song key is still an estimate.

A groove can be counted on the main beat or at twice that pulse, so 86 and 172 BPM may describe the same feel. Compare the half-time and double-time values, then choose the count that fits your beat grid.

Steady songs with clear drums are easier to measure than rubato, sparse or changing-tempo tracks. The confidence value describes beat tracking, while key detection can be uncertain on percussion-heavy or harmonically ambiguous audio. Treat both as estimates and check by ear.

Yes. You can analyze a song without creating an account or installing an app. Upload analysis runs in your browser, and you can try the included demo track before choosing your own audio.

Audio files you select are decoded and analyzed on your device; they are not uploaded to our server. Direct audio links are fetched by your browser from their source and need CORS access. Your result history and replay audio are kept in this browser, where you can clear them at any time.

Choose MP3, WAV, FLAC, M4A, AAC or OGG audio up to 100 MB. Your browser must be able to decode the selected format. Clips shorter than four seconds are too short for this analyzer to measure reliably.

Open Tap tempo and tap along with the beat. After four taps, the tool estimates the tempo from the intervals; a pause of more than 2.5 seconds starts a fresh count. Tap tempo gives you a tempo estimate, but it cannot identify the song key or Camelot code without audio analysis.

For an analyzed audio file, Essentia's confidence is a relative beat-tracking score, not a probability that the result is correct. For Tap tempo, the percentage reflects how consistently your taps were spaced. Neither score is a separate confidence rating for the detected key.

Yes. Use Play in the shared result panel to preview the selected track, seek on its waveform and hear the beat-grid clicks. Previous tracks in Results can be replayed from browser storage, and Try the demo track loads a sample if you do not have a file ready.

Open Check beat grid while a song is selected. Listen to the song with the synthesized click, then adjust the tempo by 0.1 BPM, halve or double it, or move the beat offset by 10 ms. Use Beat 1 = now to reset the grid's starting point.

Analyze tracks one at a time; each completed result is added to the Results history in this browser. Use Copy all or Export CSV to take the saved BPM, key, Camelot code and confidence values into another app. The tool does not queue a batch of files in one action.

Different services use different analysis methods, and the audio version, edit or live recording may not match the one you are checking. Tempo can also be counted in half-time or double-time, while key tools can choose a relative major or minor. Treat the result as an estimate for the exact audio you selected.

Analysis time depends on your device and browser. To keep the page responsive, the analyzer checks up to 60 seconds from the middle of the track rather than processing the full song.

Check that the file is at least four seconds long, has audible sound and uses a format your browser can decode. Ambient audio, sparse beats, noisy recordings or music with changing tempo or harmony may not produce a steady estimate.

Yes. Tempo is the speed of a song, and BPM means beats per minute—the unit used to express that speed. A tempo finder and a BPM finder are two names for tools that estimate the same value.