Free Course Library

Free courses, hand-picked.

No account needed to browse or watch. Every course here is free on YouTube — we just organized it by level and built you a place to take notes without switching tabs.

AI Foundations

42m
AI FoundationsBeginner

Prompt Engineering Tutorial — Master ChatGPT and LLM Responses

freeCodeCamp.org

A hands-on walkthrough of how to write prompts that actually get good results from ChatGPT and other LLMs — the first skill worth learning before anything else.

19m
AI FoundationsBeginner

But what is a neural network? | Deep learning chapter 1

3Blue1Brown

The clearest visual explanation of how a neural network actually works, no coding required — start here if 'neural network' still feels like a magic phrase.

1h 0m
AI FoundationsIntermediate

[1hr Talk] Intro to Large Language Models

Andrej Karpathy

Former Tesla AI director and OpenAI researcher Andrej Karpathy explains how large language models like ChatGPT are actually built and trained, in one sitting.

Python & Programming

4h 27m
Python & ProgrammingBeginner

Learn Python — Full Course for Beginners

freeCodeCamp.org

A complete beginner's introduction to Python — the language nearly every AI course after this one assumes you already know.

15h 58m
Python & ProgrammingIntermediate

Harvard CS50's Introduction to Programming with Python

Harvard / CS50

Harvard's full university course on programming with Python, taught by David Malan — the deepest option here if you want a real computer-science foundation.

Machine Learning

3h 54m
Machine LearningIntermediate

Machine Learning for Everybody — Full Course

freeCodeCamp.org (Kylie Ying)

Covers the core machine learning algorithms — classification, regression, neural networks, clustering — with real code you run alongside the video.

Build From Scratch

2h 26m
Build From ScratchAdvanced

The spelled-out intro to neural networks and backpropagation: building micrograd

Andrej Karpathy

Builds a neural network and backpropagation from raw Python, line by line — the best way to actually understand what's happening under the hood of every ML library.

1h 56m
Build From ScratchAdvanced

Let's build GPT: from scratch, in code, spelled out

Andrej Karpathy

Builds a GPT-style language model from scratch in code — for students who've finished the basics and want to see exactly how ChatGPT-like models work internally.