Learning

FreeCodeCamp

#coding#web-dev#javascript#python#free

About this Resource

Learn web development, data science, and machine learning for free with hands-on projects.

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MDN Web Docs

The primary resource for web developers, documenting HTML, CSS, and JS since 2005.

JavaScript.info

The modern JavaScript tutorial, from basic to advanced topics with deep explanations.

CSS-Tricks

The legendary site for front-end developers focusing on CSS, HTML, and JS techniques.

System Upgrade in Progress

We're currently upgrading our tools and internal infrastructure to bring you a faster, more powerful experience. UniversalTools will be back soon with exciting new features.

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Scheduled completion: June 1st, 2026