MDN Web Docs
Mozilla Developer Network provides comprehensive documentation on HTML, CSS, and JavaScript, along with tutorials and guides.
www.developer.mozilla.org

 

FreeCodeCamp
Offers a free full-stack web development curriculum covering HTML, CSS, JavaScript, and more. It also includes projects for hands-on practice. 
www.freecodecamp.org

 

Codecademy
Provides interactive courses on HTML, CSS, JavaScript, and other programming languages. The basic courses are free, but they also offer a premium subscription for more features.
www.codecademy.com

 

 

W3Schools
Offers tutorials on various web technologies like HTML, CSS, JavaScript, and more. It's a good resource for quick reference and learning. .
www.w3schools.com

 

YouTube
There are many YouTube channels dedicated to web development tutorials. Some popular ones include Traversy Media, The Net Ninja, and Academind. www.youtube.com/@TraversyMedia

www.youtube.com/@NetNinja

www.youtube.com/@academind

 

Coursera
While some courses on Coursera require payment, many offer audit options for free. Look for courses from institutions like Johns Hopkins University, the University of Michigan, and others.
www.coursera.org