I want to upload a big collection of URLs (or a small collection or just one URL - occasions vary) and get subject tags assigned automatically (then I would dow

I want to upload a big collection of URLs (or a small collection or just one URL - occasions vary) and get subject tags assigned automatically (then I would download the dataset back). This is about functional programming, that is about Star Wars, other two are about healthcare etc. del.icio.us could do this. Pocket can do it (albeit not for free). Are there more alternatives?