There are a number of free and commercial web editors available. If you use Windows, one of the best around is Microsoft Expression Web. This was a formerly commercial program that Microsoft now distributes for free, presumably because they no longer want to be in the web editor business. It is fully-featured and very polished (as befits software that was once sold in shops) with facilities that both new and experienced webmasters find useful. You can find a guide on how to use this program from my Expression Web Tutorial. The latter takes you through the process of designing a fully functional multi-page website that is mobile-friendly (that is, your site will work well on both desktop/laptop computers and the smaller screens of mobile devices like smartphones and tablets). Instructions on how to get the editor can also be found in that tutorial. building a website