5 free browser tools

Free BPMandKey tools

Free, no-account tools that run entirely in your browser. Nothing is uploaded — your audio never leaves your device.

Tap any key to find the BPM — with ×2/÷2, dotted, and triplet readouts.

Drop a track, get its tempo with an honest confidence score — instantly, locally.

Detect a song's musical key with the Camelot code and an honest confidence chip.

BPM → milliseconds and hertz for every note value — the producer bookmark.

A drift-free metronome with subdivisions, accents, and a tempo trainer.