freeCodeCamp.org

For today's coding challenge, you'll calculate how long a student has to wait before attempting an online exam again. We call this the cooldown period. Check it out on the freeCodeCamp mobile app.

Claude Code can do more than chat. It can read files, run terminal commands, and help you build agentic workflows from the terminal. In this course, you'll learn how to install and use Claude Code on Windows, Linux, and Mac, and how the agentic loop works. You'll also learn session management, how to track API usage and costs across providers, and more. freecodecamp.org/news/claude-co…

Machine learning projects can get messy fast when experiments, models, and artifacts are scattered across notebooks and folders. In this tutorial, @t_koded teaches you how to use MLflow to keep track of it all and manage your models through the ML lifecycle. You'll also learn how MLflow Tracking, Projects, Models, and the Model Registry fit together in a production workflow. freecodecamp.org/news/how-to-us…

JWTs and passwords can still leave you exposed to replay and token theft. WebAuthn changes that by keeping the private key on the device. In this tutorial, @sumit_analyzen teaches you how to build passwordless biometric login in Node.js with WebAuthn. You'll also learn how registration, authentication, sessions, recovery, and step-up auth fit together in a real app. freecodecamp.org/news/set-up-we…

On this episode of the freeCodeCamp podcast, Quincy interviews CodePen and CSS Tricks founder Chris Coyier. They talk about the state of front-end development tools, why highly skilled devs working on novel problems are likely safe from AI, and more. freecodecamp.org/news/the-world…

If you think about refactoring your codebase, what comes to mind? Fear? Annoyance? A sense of overwhelm? Well, don't worry - here, @TheAnkurTyagi walks you through some helpful ways to refactor complex codebases. You'll learn about isolating issues, breaking down monolithic code, testing, and lots more. freecodecamp.org/news/how-to-re…

For today's coding challenge, you'll get an array of student exam scores and the score needed to pass the exam. Your task is to return the number of students who passed. Check it out on the freeCodeCamp mobile app.

When you're building conversational AI, things can get messy and workflows can be hard to scale. But you can use a tool like the LangGraph Python framework to manage dialogue flow and keep your bots organized. In this course, you'll build five agents from scratch, learn how to integrate RAG, and more. freecodecamp.org/news/learn-lan…

If you've been wanting to start learning Spanish, this course is for you. You'll dive into A1-level basics like key verbs, important grammatical structures, and different verb tenses. You'll also practice terms you'll use in real-world conversations, learn how to talk about likes/dislikes, and lots more. freecodecamp.org/news/learn-a1-…

As you improve your coding skills, you'll want to learn how to write Clean Code. This means writing code that's readable, clear, and well-organized - and that anyone can understand. In this quick guide, Nitin shares some simple tips to help you write cleaner, more maintainable code. freecodecamp.org/news/tips-for-…

The Domain Name System translates domain names (like example.com) into IP addresses (like 192.0.2.1) so you can easily access websites. And in this guide, Dhruv explains how DNS works. You'll learn about the resolution process, caching, resolvers, domain registrars, and lots more. freecodecamp.org/news/how-dns-w…

It's a good idea to have a portfolio if you're a dev - it's a great place to showcase your work and skills. And in this in-depth guide, @prankurpandeyy walks you through building one using Figma and some AI tools. He explains what your portfolio should have, how to write good copy, how to test and host it, and more. freecodecamp.org/news/how-to-bu…

If you're into game development, there's one key thing you can't ignore: screen resolution. It affects how your art assets scale, how your UI appears, and how your game feels on different screens. In this guide, @manishmshiva explains DPI, scaling, and texture clarity, aspect ratio, display diversity, and lots more. freecodecamp.org/news/a-game-de…

APIs are key components of modern software applications, helping different systems and services communicate. And in this course, Dan teaches you how to keep your APIs secure. You'll learn about governance, testing, and monitoring, how attackers exploit API vulnerabilities, & how to defend against them. freecodecamp.org/news/learn-the…

For today's coding challenge, you'll get a string to work with. Your task is to determine if it has no repeating characters. Check it out on the freeCodeCamp mobile app.

If you're learning to play guitar and you want to brush up on your theory, this course is for you. It covers all the basics you need to know like the fretboard, major scale, and triads along with chord progressions, unisons and octaves, chord voicings, and more. freecodecamp.org/news/guitar-th…

Backend Web Development involves managing user data, authentication, and database communication. And in this course, you'll learn how to build a back end using the popular tools Node.js, Express, and MongoDB. You'll set up the server, DB, and code structure, learn how to work with APIs for authentication, how CRUD operations work, & more. freecodecamp.org/news/intro-to-…

If you're ready to level up your developer portfolio, this course is for you. You'll use Three.js, Blender, and JavaScript to build an adorable portfolio that looks like a home office. You'll learn about quad topology, texture backing, modeling objects, and lots more. freecodecamp.org/news/create-a-…

These days, understanding how Docker works is a key skill for back end and full stack developers. And in this handbook, @stephenjyd teaches you everything you need to know to get started using it. You'll learn basic commands, how to pull images & run containers, how to create a private Docker repo, and lots more. freecodecamp.org/news/how-to-us…

Reanimated is an animation library that runs animations on the native thread instead of the JavaScript thread. And you can use the new v4 with React Native and still have backward compatibility with its worklet-based API. In this tutorial, @03balogun shows you how to create fluid animations with React Native Reanimated v4. freecodecamp.org/news/how-to-cr…