Key & BPM Finder

Key & BPM Finder estimates the dominant major or minor key and tempo from an audio recording. The table includes Camelot notation for harmonic mixing, energy and danceability readouts, plus source playback and CSV export. Energy is a level estimate and danceability a beat-regularity estimate; a mood or happiness score cannot be read from a waveform and is not reported.

Most reliable on tonal, commercially mixed music. Sparse, atonal or heavily percussive material gives the analyzer less harmonic information, and modal tracks can read as their relative major or minor.

Usually the relative major or minor of the same key signature - the same notes, read from a different root. Check whether the reported alternative fits your melody before overriding it.

Key & BPM Finder accepts browser-decodable audio up to 20 MB and 10 minutes per file. Select multiple files for sequential analysis; a complete arrangement usually gives more tonal context than a short fragment.

Because both are correct readings of the same pulse. Halftime genres are the usual cause - check which one matches how you would count it.

Harmonic mixing. Adjacent Camelot numbers share enough notes that two tracks can be played together without the keys clashing.

The Key & BPM Finder reports the dominant key across the file. For a song with a late modulation, analyze the sections separately if the ending matters to you.

Aimusicis issues a signed commercial-use license for songs generated in its music studio: included with yearly plans, otherwise 100 credits for a song's first license, and free to download again. It does not cover material you upload or output made from it, so confirm you hold the rights to every uploaded or referenced source before publishing.

Play the source again to check the estimated tempo, then export the table as CSV. Analysis results stay in this browser tab and are not saved to My Music.

Key & BPM Finder runs in the browser and draws zero credits.

Music to prompt turns one of your songs or an upload into a prompt for AI music, with style, instrument and mood tags and its measured tempo and key. Beat Key Finder: upload a beat and get its musical key and BPM, so vocals, samples and MIDI parts are written in the right key the first time. Beat Finder: estimate BPM and key from uploaded recordings. Compare tempos, check half-time alternatives, preview the source and export an analysis table. BPM Tapper: find the tempo of any track by tapping along with your mouse, touch or the spacebar. No sign-in, no credits, no server round-trip. Metronome: set 30 to 300 BPM and a bar of one to twelve beats, with an accented first click. It runs in your browser, with no sign-in and no credits. Random Key Generator: roll or pick a root and one of nine modes, read the key spelled the way it is written, and hear its chords. Reverb Calculator: enter a tempo, pick the length the reverb fills and a pre-delay, and read a decay that ends on the beat. Then hear it. Frequency Generator: play a sine, square, triangle or sawtooth tone from 20 Hz to 20 kHz, pick any note, and save it as WAV, MP3 or FLAC. Audio Spectrum Analyzer: play an audio file and read 72 frequency bars from 20 Hz to 20 kHz, with the peak frequency, its level in dB and the nearest note. Chromatic Tuner: play or sing one note and read the nearest note name, its frequency in hertz and the deviation in cents, with a movable 440 Hz reference. Guitar Tuner: play a string and the page highlights the nearest of the six standard strings, reads the pitch in hertz and shows the deviation in cents. Vocal Range Test: sing your lowest then highest comfortable note and read your range as named notes, a semitone count and a span in octaves.