CSS, or Cascading Style Sheets, defines the look and formatting of that HTML. Both are essential to coding your own website, and here's how to get acquainted with them.

Thimble, which is part of Mozilla’s recently launched Webmaker project, is meant to help novice users write and edit basic HTML and CSS right in a web-based code editor.

Master CSS headers with this complete guide. Styling, hierarchy, and branding tips for better websites. Updated for 2025.

As of today, people versed in basic HTML and CSS can use Jimdo to “borrow” the design of any site that suits their fancies.