Answers for your music workflow.

Yes. BPMKEY is free to use for the core analysis workflow. There is no account, subscription or premium unlock required to start analyzing your tracks.

BPMKEY supports MP3, WAV, M4A, FLAC, AAC and OGG files, with the current interface allowing files up to 50MB.

Yes. Select multiple compatible files and BPMKEY adds them to your analysis library, where you can search, filter, preview and export results.

BPM means Beats Per Minute. It describes a track's tempo: the number of beats that occur in one minute. DJs commonly use BPM to match the speed of songs during transitions.

A musical key describes the tonal center and note relationships a song is built around. It is commonly expressed as a root note plus major or minor mode, such as C major or F# minor.

Camelot notation turns musical keys into DJ-friendly codes such as 8A and 8B. It provides a quick visual reference for planning harmonically related transitions.

Tempo matching helps maintain a steady rhythmic feel during transitions. Sorting a library by BPM also makes it easier to find tracks in a similar speed range.

The browser decodes the audio, analyzes rhythmic and tonal information, estimates tempo, compares pitch-class information against key profiles and presents the result with its corresponding Camelot code.

Automatic music analysis is an estimate. Half-time or double-time rhythms, live drumming, tempo changes, unusual tuning and complex harmony can lead different analyzers to choose different interpretations. For critical DJ transitions or production decisions, use your ears to verify the result.

Use a clean, full-length audio source when possible. Tracks with a consistent rhythmic pulse are usually easier to estimate, while heavily changing or live recordings can be more challenging.

Yes. The track workspace includes search, filters, BPM sorting, playback controls and CSV export so you can continue using your analyzed information elsewhere.

BPMKEY is designed so analysis happens locally in your browser. Your audio is not intended to be uploaded to or stored as a track library on our server.

No. You can open BPMKEY and begin analyzing compatible audio files without creating an account.