Interactive API demo

Upload audio and watch BeatSync API cut the preview on rhythm.

Use your RapidAPI key to test the multipart upload endpoint. The demo renders a local waveform, shows returned beats and cut points, then flips the preview between black and white as the audio crosses each cut.

Need an API key?

Open the RapidAPI listing, subscribe to a plan, then copy X-RapidAPI-Key from the code snippet panel.

Get key

RapidAPI keyUpload or drop audioMP3, WAV, M4A, OGG, WebM · up to 50 MB

Cut preview1

0:00 / 0:00

Analyze a file to show BPM, beats, cut points, and playback markers.