
The freeCodeCamp Responsive Web Design Certificate teaches the basics of HTML, CSS, and responsive web design. It focuses on creating layouts that adapt to different devices and includes projects to practice these skills.

The freeCodeCamp JavaScript Algorithms and Data Structures Certificate focuses on learning JavaScript, ES6 features, algorithms, and data structures. It includes challenges to practice problem-solving and logical thinking.

The Sololearn Web Development Certificate teaches HTML, CSS, and JavaScript. It provides interactive lessons and small projects to help learn how to create functional and responsive websites.