freeCodeCamp.org

If you want to know more about a web page, you could go to DevTools or an SEO auditing tool. But what if you want instant info, without having to leave your browser? In this tutorial, Hitesh helps you build a Chrome extension that analyzes any web page using JavaScript and…

Today's coding challenge is all about prime numbers. Given an integer n, you'll need to return the nth prime number. Try and solve it on the freeCodeCamp mobile app.

When you're building your UI in Flutter, you'll want it to be responsive - without having to manage multiple layouts. Fortunately, Flutter has various tools that help you do this. In this tutorial, @atuohaa teaches you about some key widgets to use, how media queries work, and…

You may have heard a lot about the Model Context Protocol lately. It allows LLMs to securely share context and communicate with outside data sources, making them much more powerful. In this guide, Manish explains how this protocol works and why it's so useful.…

There are many fields in which AI can streamline processes and automate tedious tasks. And one area with many applications for AI tools and technologies is agriculture. In this book, Vahe details how AI can help increase crop yields, use water more efficiently, predict and…

IPv4, or Internet Protocol version 4, is a system used to identify devices on the internet or a local network. And in this handbook, Omer explains how it works and why it's important. You'll learn about how IP addresses work & their different formats, network addressing…

When you're designing web applications, you'll want to make them accessible to everyone. And in this guide, @grantdotdev discusses some helpful techniques to make your React apps accessible & user friendly. He covers error handling, using placeholders, fieldset and legend,…

On October 29th, 1971, the first email ever was sent. For today's coding challenge - 54 years later - you'll code a little email sorter. Check it out on the freeCodeCamp mobile app.

Calculus is a powerful tool for understanding change, motion, and growth - and it's good to know as a dev. In this new College Calculus course, Ed teaches you the key concepts through the lens of Python. You'll learn about limits, derivative rules, slope interpretation, various…

Building a website from scratch might feel overwhelming at first. That's why @Kunal_N25 wrote this tutorial - to walk you through the process step by step. You'll start by coming up with an idea & setting up the project, then move on to building the website, testing the code, &…

Closures exist in many programming languages, and their core concept is the same: They capture variables from their surrounding scope. And here, @gkoos430 teaches you how they work in go. You'll learn about named inner functions, goroutines, concurrency, how to test and debug…

Sometimes different parts of your app need to access and update the same information. This can lead to a shared state problem in React - and it becomes a real headache with large, complex apps. In this handbook, Henry helps you understand the problem, discusses issues with…

Building secure applications has never been more important with the increasing number of attacks. So as an iOS developer, you'll need to prioritize security throughout the development process. In this tutorial, Alex teaches you how to build secure iOS apps in Swift by walking…

TanStack Start is a new full-stack framework for React that's an alternative to options like Next.js and Remix. And in this tutorial, @andrewbaisden walks you through how to get started with it. You'll use it to build a CRUD app along with TanStackDB and add RxDB integration,…

Today's coding challenge is a throwback to this date in 1994 when Netscape Navigator was released. If you want to know more - and figure out how to solve it - check it out on the freeCodeCamp mobile app.

In shadcn, a registry is a place for sharing and managing your reusable components, utilities, and so on between projects. And in this tutorial, Abhijeet shows you how to set one up. You'll learn about the namespace system, auth for private registries, CLI commands, error…

Many devs are using AI tools in their workflows - but all these tools need a way to communicate. That's where the Model Context Protocol comes in. In this guide, @atuohaa explains how MCP works and how it connects with Dart, & walks you through practical examples.…

TOML has become the modern standard for configuration files in Python projects. It's more expressive than INI files and cleaner than JSON or YAML - and all Pythonistas should know how it works. In this tutorial, Bala teaches you how to read and work with these files, how to…

If you're getting into DevOps, you might think it sounds expensive - lots of paid tools, right? Well, not necessarily - here, @emidowojo helps you build a production-ready DevOps pipeline with free tools. You'll use GitHub Actions, Terraform, Docker, Grafana Cloud, Prometheus,…

If you want to learn how to build & deploy ML models, this course is for you. It covers Exploratory Data Analysis, Feature Engineering, Model Validation, & MLOps integration. By the end you'll be able to manage complex data projects & deploy your models.…