HTML can be edited by using a professional HTML editor like:

•Adobe Dreamweaver
•Microsoft Expression Web
•CoffeeCup HTML Editor

Notepad (PC) or TextEdit (Mac) is recommended for learning

Writing HTML:
Step 1: Open Notepad or TextEdit
Step 2: Write some HTML
Step 3: Save the file on your computer
Name the file "index.htm" or any other name ending with htm.
UTF-8 is the preferred encoding for HTML files
ANSI encoding covers US and Western European characters only.
You can use either .htm or .html as file extension. There is no difference, it is up to you
Step 4: View the HTML page in your browser
Open the saved HTML file in your browser
To open a file in a browser, double click on the file, or right-click, and choose open with