BPM & KeyFree
Song Key Finder
Detect the musical key of any song instantly. Upload an audio file and find out what key a song is in. Free online key detector, no signup required.
Drop your audio file here
or click to browse — MP3, WAV, FLAC, AAC supported
Powered by Madmom — professional key analysis
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About Song Key Finder
Detect the musical key of any song instantly. Upload an audio file and find out what key a song is in. Free online key detector, no signup required. MusicToolSet provides free online music tools for musicians, producers, DJs, and music students. No signup required, no downloads needed — everything runs directly in your browser.