How do I download the landing page？

I have no spy tool, there are other software to download lp pages, but the downloaded lp pages are not the same, and the download of pictures, css, js and so on is incomplete, which leads to the modification of lp is very inconvenient. And in the local debugging, the relative path and the absolute path will lead to the local display and upload the display is incomplete, this time how to deal with it? Is there a complete lp page download method (do not buy spy tool), and a