Everything stays in your browser. You get a JSON block + two WebP files + steps to open a pull request.
Drop several photos. Each is analysed; edit inline, then get one JSON array + a zip of all the WebP files. Nothing is uploaded.
Nobody could place these covers yet: no GPS in the source photos and no public exact address. If you recognise one, fill in what you know; it builds a JSON block + steps to open a pull request. Nothing is uploaded automatically.