From http://www.w3schools.com (Copyright Refsnes Data)
You don't need any tools to learn HTML at W3Schools.
In this tutorial we use a plain text editor (like Notepad) to edit HTML. We believe this is the best way to learn HTML.
However, professional web developers often prefer HTML editors like FrontPage or Dreamweaver, instead of writing plain text.
If you just want to learn HTML, skip the rest of this chapter.
If you want to create a test web on your own computer, just copy the 3 files below to your desktop.
(Right click on each link, and select "save target as" or "save link as")
After you have copied the files, you can double-click on the file called "mainpage.htm" and see your first web site in action.
We suggest you experiment with everything you learn at W3Schools by editing your web files with a text editor (like Notepad).
Note: If your first web site contains HTML markup tags you have not learned yet, don't panic. You will learn much more HTML in the next chapters.
When you save an HTML file, you can use either the .htm or the .html extension. We use .htm in our examples. It is a habit from the past, when the software only allowed three letters in file extensions.
With new software it is perfectly safe to use .html.
From http://www.w3schools.com (Copyright Refsnes Data)