Best free courses to learn AI

1. Learn to build with generative AI in 21 free lessons
   ★ 123kstars
   generative-ai-for-beginners by microsoft · Free alternative to Coursera AI courses
   21 lessons on building with generative AI
   No codingGuide or readingHealthy
2. Learn machine learning in 12 weeks with free lessons
   ★ 92kstars
   ML-For-Beginners by microsoft · Free alternative to DataCamp
   Classic machine learning, step by step
   No codingGuide or readingHealthy
3. Learn how neural networks work in a free video course
   ★ 25.3kstars
   nn-zero-to-hero by karpathy · Free alternative to DeepLearning.AI
   Build neural networks from scratch with videos
   No codingGuide or readingFair
4. See how ChatGPT-style AI works with an interactive visual
   ★ 9.1kstars
   transformer-explainer by poloclub
   See how ChatGPT-style models work
   No codingWebsite▶ Try onlineFair
5. See how image-recognition neural networks work, interactively
   ★ 9.1kstars
   cnn-explainer by poloclub
   See how image recognition works
   No codingWebsiteUse with care

Ranked for people new to AI: ease of use first, then quality, upkeep and popularity. Last checked 4 Nov 2026.

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