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.

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

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RapidAPI key

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

Cut preview1

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