How AI Beat Detection Works
FFT-based onset detection — returns beat timestamps in seconds for music-driven editing.
Try it free →Step-by-step process
- 1
Add your audio
Drop or select the audio you want to process — it stays on your device.
- 2
Run the model in-browser
AI Beat Detection runs instantly with no download — the work happens locally in a worker.
- 3
Download the json
Preview the result and download the json. Re-run with different settings anytime.
Frequently asked questions
What do I get?
A list of beat timestamps you can snap cuts/effects to.
Is it free to use?
Yes — AI Beat Detection is completely free. No account, no watermark, no credits, and no usage limits.
Do my files or prompts ever leave my device?
No. Everything runs locally in your browser via WebAssembly/WebGPU — there is no server that receives your files, prompts, or results.
Which browser and hardware do I need?
A modern browser. Chrome and Edge get WebGPU acceleration for the fastest results; Firefox and Safari run via WebAssembly. This tool downloads nothing and runs on any device.
Can I use the results commercially?
Yes. You own everything you create — NSS makes no claim to the images, videos, or text you process or export.
Does it work on mobile?
Yes — it runs on phones and tablets too, since there is no model download.
Where can I see a step-by-step guide?
Yes — there is a full walkthrough at /how-it-works/ai-beats.