Official Course
Intermediate
DeepLearning.AI / Coursera · Deep Learning
A five-course series taught by Andrew Ng, running from neural network basics to CNNs, RNNs, and sequence models. Audit for free; certificates require a subscription.
Free Tutorial
Intermediate
fast.ai · Deep Learning
The famous top-down deep learning course: get projects running first, then learn the theory. Ships with the fastai library and full video lectures, all free.
Free Tutorial
Intermediate
Andrej Karpathy · Deep Learning
A video series by former OpenAI founding member Andrej Karpathy: build backpropagation, character-level language models, and miniGPT from scratch. Hardcore but hugely popular.
Official Course
Intermediate
斯坦福大学 · Deep Learning
A landmark computer vision course covering CNN architectures, training tricks, and frontier models, with all videos and notes public.
Official Docs
Beginner
★ Featured
PyTorch（Meta） · Deep Learning
PyTorch's complete official tutorials, from tensor basics to large-model training, with a Chinese version on the site plus a 60-minute quick start.
Official Docs
Beginner
Google · Deep Learning
Official TensorFlow tutorials covering a quick Keras start plus full-scenario examples for vision, text, and generative AI.