Free ways to learn to code

General 9

• CS50x

  Harvard's free introduction to computer science. A demanding and very well-taught foundation for any track.

  cs50.harvard.eduFree courseBeginner

• The Missing Semester of Your CS Education

  MIT lectures on the tools most courses skip: the shell, editors, Git, debugging and more.

  missing.csail.mit.eduFree courseBeginner

• Devhints

  A big collection of short, readable cheatsheets for languages, frameworks and command-line tools.

  devhints.ioCheatsheetBeginner

• GitHub Git Cheat Sheet

  A one-page PDF of the Git commands you will use every day.

  education.github.comCheatsheetBeginner

• roadmap.sh

  Community-built learning roadmaps and guides for almost every developer role.

  roadmap.shGuideBeginner

• Pro Git

  The complete Git book, free to read online, from the basics to how Git works internally.

  git-scm.comBookBeginner

• The Python Tutorial

  The official Python tutorial. A clear tour of the language for people who have programmed a little.

  docs.python.orgDocsBeginner

• Learn Git Branching

  An interactive, visual way to learn branching and rebasing right in your browser.

  learngitbranching.js.orgPracticeBeginner

• freeCodeCamp on YouTube

  Thousands of hours of free full-length programming courses on nearly every topic.

  youtube.comVideoBeginner

Web 5

• freeCodeCamp

  A free interactive curriculum with projects and certifications, covering web development, Python, data and more.

  freecodecamp.orgFree courseBeginner

• The Odin Project

  A free, project-based full-stack web curriculum that teaches you to use real tools from the start.

  theodinproject.comFree courseBeginner

• Full Stack Open

  The University of Helsinki's free course on modern web development with React, Node.js and testing.

  fullstackopen.comFree courseIntermediate

• MDN: Learn web development

  Mozilla's structured path through HTML, CSS and JavaScript, from one of the web's most trusted references.

  developer.mozilla.orgGuideBeginner

• Eloquent JavaScript

  A well-loved book on JavaScript and programming in general, free to read online.

  eloquentjavascript.netBookBeginner

DevOps 4

• tldr pages

  Community-written command-line help with practical examples, instead of long man pages.

  tldr.shCheatsheetBeginner

• Site Reliability Engineering

  Google's book on running production systems, free to read online.

  sre.googleBookAdvanced

• Docker: Get started

  The official hands-on introduction to containers, images and Compose.

  docs.docker.comDocsBeginner

• Kubernetes Basics

  The official interactive tutorial for deploying, scaling and updating an app on Kubernetes.

  kubernetes.ioDocsIntermediate

Backend 4

• The Twelve-Factor App

  A short, influential guide to building services that are easy to deploy, configure and scale.

  12factor.netGuideIntermediate

• The Rust Programming Language

  The official Rust book, free online. A clear introduction to ownership and systems programming.

  doc.rust-lang.orgBookIntermediate

• SQLBolt

  Short interactive lessons that teach SQL by writing real queries in the browser.

  sqlbolt.comPracticeBeginner

• A Tour of Go

  The official interactive introduction to Go. You run every example in the browser.

  go.devPracticeBeginner

Mobile 3

• Android Basics with Compose

  Google's free course for building Android apps with Kotlin and Jetpack Compose, with no experience needed.

  developer.android.comFree courseBeginner

• The Swift Programming Language

  The official guide to Swift, free online. The language behind modern iOS development.

  docs.swift.orgBookBeginner

• Flutter documentation

  Official docs and learning paths for building iOS, Android, web and desktop apps from one codebase.

  docs.flutter.devDocsBeginner

Security 3

• OWASP Cheat Sheet Series

  Concise, practical guidance on specific application security topics such as authentication and input validation.

  cheatsheetseries.owasp.orgCheatsheetIntermediate

• Web Security Academy

  Free, legal labs from PortSwigger that teach real web vulnerabilities and how to prevent them.

  portswigger.netPracticeIntermediate

• OverTheWire Wargames

  Legal hacking games that teach Linux and security concepts. Start with Bandit.

  overthewire.orgPracticeBeginner

Data/ML 2

• Practical Deep Learning for Coders

  fast.ai's free course teaches deep learning by building working models first and explaining the theory after.

  course.fast.aiFree courseIntermediate

• Kaggle Learn

  Short, free, hands-on micro-courses on Python, pandas, SQL and machine learning that run in the browser.

  kaggle.comFree courseBeginner

GameDev 2

• Learn OpenGL

  A free, thorough guide to modern graphics programming, from your first triangle to advanced lighting.

  learnopengl.comGuideAdvanced

• Godot documentation

  Official docs for the free, open-source Godot engine, including step-by-step first game tutorials.

  docs.godotengine.orgDocsBeginner

Frontend 1

• web.dev Learn

  Free courses from Chrome's developer relations team on CSS, performance, accessibility and more.

  web.devGuideIntermediate

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