freeCodeCamp

A nonprofit that has taught 40,000+ people to code well enough to get developer jobs. The curriculum is 3,000+ hours of interactive lessons covering HTML, CSS, JavaScript, React, Node.js, Python, and machine learning — all completely free, forever. No login wall, no trial period, no upsell. Funded by donations. freeCodeCamp's YouTube channel (9 million+ subscribers) is the largest programming education channel in the world. The platform has been used in 189 countries. Quincy Larson started it in 2014 after teaching himself to code at 31 and wanting to make the process accessible to everyone.