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KeyBPM

djjohny

Free in-browser analyzer that detects the BPM and musical key of any audio file, privately on your device.

Free
Utilities

Overview

KeyBPM is a free, browser-based tool that detects the tempo (BPM) and musical key of an audio file with no installation or sign-up. All analysis runs locally in the browser, so your audio never leaves your device.

It is built for producers, vocalists, and audio engineers who need a quick key and tempo reading before tuning, mixing, or arranging a track.

  • Detects BPM, musical key, and relative key from an uploaded file
  • Runs fully client-side so files are never uploaded to a server
  • Supports MP3, WAV, FLAC, and AAC audio
  • Key output formatted for pitch tools like Auto-Tune and Waves Tune
  • No account or install required
  • Completely free to use

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