How AI Chapter Generator Works
YouTube-style chapter markers: scene detection + per-scene caption + LLM titling.
Try it free →Step-by-step process
- 1
Add your video
Drop or select the video you want to process — it stays on your device.
- 2
Run the model in-browser
AI Chapter Generator loads its model (~500 MB) once, caches it, then runs locally in a worker. No upload.
- 3
Download the json
Preview the result and download the json. Re-run with different settings anytime.
Frequently asked questions
How are chapters chosen?
It segments the transcript by topic shifts and emits timestamped chapter titles.
Is it free to use?
Yes — AI Chapter Generator 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. The model (~500 MB) downloads once, then is cached for offline use.
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?
Lightweight tools run on phones; heavier models prefer a desktop with a GPU. The tool picks the best path for your device and falls back gracefully where needed.
Where can I see a step-by-step guide?
Yes — there is a full walkthrough at /how-it-works/ai-chapters.