data science / deep learning
Deep Learning, Free
Neural networks power modern AI — from image recognition to large language models. Learn the theory from the definitive course, then build with the frameworks the field actually uses. All resources free and current.
Deep learning is the branch of machine learning behind today's AI breakthroughs. It has a reputation for being intimidating, but the best resources make it approachable: Andrew Ng's specialization builds the theory step by step, fast.ai gets you training real networks immediately, and the free "Dive into Deep Learning" book pairs every concept with runnable code. Learn the ideas, then build with PyTorch.
01 · LEARN IT
Courses & the free textbook
Structured paths from a neuron to a transformer.
- Deep Learning Specialization — DeepLearning.AI ↗Andrew Ng's landmark five-course series covering neural networks, CNNs, sequence models, and more. Free to audit.coursera.org
- Dive into Deep Learning (free book) ↗An interactive, free textbook where every concept comes with runnable code — used in courses at 500+ universities.d2l.ai
02 · BUILD IT
Frameworks & hands-on
Get your hands on real networks with the tools practitioners use.
- Practical Deep Learning — fast.ai ↗Free and famously effective — train state-of-the-art models from the first lesson, then learn the theory underneath.course.fast.ai
- PyTorch Tutorials (official) ↗The official, free hands-on tutorials for the deep-learning framework that dominates research and increasingly production.pytorch.org