How do I learn to code in HTML and CSS on my Mac? Web design is one of the most useful skills you can learn, and it’s easy to learn HTML and CSS (the two main pillars of web pages) in Mac OS X.

Repl.it has also brought together users from outside the United States. Lucy Durrand, a 14-year-old from Scotland, has been learning to code in Python and HTML in her computing class.

Learn HTML and CSS online for free, and use them to create webpages or move up in your career.