AI Scene Detection
Detect scene cuts via histogram + colour-cluster heuristics. Generates chapter markers and per-scene thumbnails.
| Mode | Speed | Quality | Best for |
|---|---|---|---|
| Histogram scene-cut | Fast | Detects shot boundaries | Auto chaptering, b-roll indexing |
Quick start
See all 3 presets
Drop videos here — add as many as you like
or click to browse · processed one at a time · output json
Want this capability inside the main editor with layers, history, and the full AI panel?
How it works
- 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 Scene 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.
Common use cases
Why it’s different
100% Private
Every model runs in your browser. Your files never leave your device — nothing is uploaded to a server.
True Alpha Channel
Exports preserve a real straight-alpha transparency channel (PNG / WebP / AVIF), not a baked-on background.
Free Forever
No account, no watermark, no credits. Open the tool and use it.
Works Offline
After the model downloads once it is cached, so the tool keeps working with no connection.
FAQ
How are cuts found?
Colour-histogram + clustering heuristics flag frames where the shot changes significantly.
Is it free to use?
Yes — AI Scene 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-scenes.
Ready to try AI Scene Detection?
Free, private, no signup — runs right in your browser.