_No, and sort of, yes. No, in the sense that the site is built online, using WebsiteTonight templates and their server-side program(s). The "yes" part is not much, but you can copy any special html you have added, write down the color (hex) numbers of your text, and use this info to help speed your rebuild elsewhere . . ..
_No, and sort of, yes. No, in the sense that the site is built online, using Weebly templates and their server-side program(s). But you can use an archive copy (see Archiving Sites in Categories listing, below) of your site to aid in rebuilding another site.
After archiving your site, open the zip file and you will find a treasure trove of useful things:
Uploads: click into the nested folders until you reach your files. Every thing that you ever uploaded to your site will be in here, in both its original form and any versions Weebly saved in an altered form. Most files will not have their original file names . . ..
_It's very easy. In your site editor, make sure you're on the SETTINGS tab, select ARCHIVE/UNPUBLLISH. Select "DOWNLOAD YOUR SITE AS A .ZIP ARCHIVE." Wait a bit, and you will be prompted to save your zip file to your computer.
An archive is helpful if you make a drastic mistake in some part of your existing site. You can't re-upload it to weebly, but you can . . .