Use SwissKnife

SwissKnife runs entirely in the browser and requires no account. English is the default interface language; the header selector switches between English, French, Spanish and German and remembers the choice.

The main screen contains:

1. a drop area with drag-and-drop, file picker and multi-file support;
2. a Privacy card beside the drop area on large screens and below it on mobile;
3. the queue of accepted files;
4. a banner when a type is rejected or a file exceeds 50 MB;
5. an optional FFmpeg log console opened with Console.

The header reports whether the engine is inactive, loading or ready. It loads only for the first audio or video job; image-only conversions never download it.

The public demo displays a Demo badge in the header. Docker and npm run dev do not.