Detect song tempo (BPM), musical scale/key, pitch, and inspect real-time FFT frequency spectrum.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Drop your MP3, WAV, FLAC, or OGG file into the workspace (up to 100MB).
View the automatically detected BPM, musical key (e.g. A Minor, C Major), and duration.
Play your track with speed controls and observe the real-time FFT frequency spectrum bars.
No. All audio decoding, peak envelope correlation, chromatic pitch analysis, and FFT frequency calculations run 100% locally in your browser via the Web Audio API.
All standard browser-supported audio formats including MP3, WAV, FLAC, OGG, AAC, and M4A.
The analyzer decodes raw PCM audio samples, filters low-frequency beat transients, and performs peak interval autocorrelation to identify the dominant tempo.
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