Courses
Step-by-step lessons with exercises you solve right in the browser.
RegexBeginner
Regex 101
Learn the basics of Regex with this interactive course. This course will introduce you to the fundamental concepts of Regular Expressions, their syntax, and how to use them for pattern matching and manipulation in text.
RegexSEO
Regex for SEO
In this tutorial, you can learn how and where you can use Regex for SEO. You will understand how to use Regular Expressions for search engine optimization, including pattern matching in URLs, meta tags, and content for better SEO performance.
CSSSelectors
Mastery of CSS Selectors
Learn CSS selectors by typing them: from p and .class to :has() and :not(), you see right away which elements each selector picks. Short steps with exercises, in your browser.