It's a free tool for crawling the web and saving snippets or entire sites to your computer's storage for later use.
You could, for instance, download all of the images or other content from a static website and view them offline. However, WebCopy does not have any sort of JavaScript parser or virtual DOM. It is more likely that WebCopy will fail to produce an accurate duplicate of a website if it relies heavily on JavaScript. In all likelihood, it will mishandle dynamic website layouts where JavaScript is heavily utilised.
There are a bunch of decent tools out there that offer the same array of services as Cyotek WebCopy. And it can sure get confusing to choose the best from the lot. Luckily, we've got you covered with our curated lists of alternative tools to suit your unique work needs, complete with features and pricing.