# Captions by Småverk

> Captions for short videos, generated on the device inside the browser page at https://captions.smaverk.com. Nothing is uploaded. Free with a small corner mark; $19 once removes it.

## What it does
- Input: a video or audio file up to 60 seconds (mp4, mov, webm, m4a). Output: the same clip with burned-in captions (mp4 on Safari and Chrome, webm elsewhere), plus word timings.
- Speech recognition runs in the page (Whisper, WebGPU with a WASM fallback). There is no server API, by design: privacy is the product.

## Driving it from a script or an agent (browser automation)
The page exposes `window.captions` and stable element ids. Example with Playwright:

```js
await page.goto("https://captions.smaverk.com/?style=karaoke");
await page.setInputFiles("#file", "clip.mp4");          // loads the clip
await page.click("#action");                              // "Add captions"
await page.waitForFunction(() => window.__cap.state === "captioned", null, { timeout: 300000 });
const words = await page.evaluate(() => window.captions.words);   // [{text,start,end}, ...]
const [dl] = await Promise.all([page.waitForEvent("download"), page.click("#action")]); // "Save video"
await dl.saveAs("clip-captions.mp4");
```

- `?style=bar|karaoke|big` preselects the caption style. `window.captions.style("big")` changes it.
- `window.__cap` mirrors state: `state`, `words`, `device`, `model`, `ms`, `exportBytes`, `error`.
- A paid key can be applied by filling `#key` and clicking `#keygo`; it is stored in `localStorage` under `smaverk.captions.key`.

## Rules
- Do not upload other people's clips anywhere on their behalf; this tool never does.
- Contact: hello@smaverk.com