Is Projet Carthage really free?

Yes, Projet Carthage is 100% free, no subscription, no ads, and no hidden fees. All 1100+ exercises, online battle code, and AI assistant are freely accessible.

What programming languages can I learn?

You can learn HTML, CSS, JavaScript, Python, React, Node.js, C#, C++, Dart, and Flutter across 8 modules and over 1100 interactive exercises.

Do I need to install software to code?

No, everything is done directly in your browser. The integrated code editor and playground allow you to write and run code without installing anything.

Battle Code is a competitive mode where you face other developers in real-time on programming challenges. There is a casual mode and a ranked mode with an ELO system.

Is it suitable for beginners?

Absolutely! Each module starts with the basics and gradually progresses. An AI assistant (Jérémie Belpois) is available to help if you get stuck on an exercise.

How does the progression system work?

Each completed exercise earns you XP. You unlock badges, level up, and climb the global leaderboard. The gamified system makes learning highly motivating.

100% Free · Ad-free · Open source

Learn to code. Save Lyoko.

The online learning platform with 1,100+ interactive exercises, an AI assistant, and real-time battles. Join Project Carthage.

HTML / CSSJavaScriptPythonReactNode.js+ 4 languages

Start for Free View Courses

No credit card requiredOnline Battle CodeXP & badges system

exercise.js — Projet Carthage

function resistance() {

// Mission: defeat XANA

const arme = "JavaScript";

const xp = 1100;

const victoire = vaincre(arme, xp);

return victoire;

}

JavaScript • UTF-8Exercise in progress

+120 XP

Exercise completed

Level 12

Lyoko Developer

Discover

Interactive exercises

Training modules

Skill blocks

Free & ad-free

All Modules

Each module is a weapon against XANA

Front-End

HTML, CSS, Bootstrap, Bulma, SCSS, JS DOM — 250 levels

Start

JavaScript

The modern interactive web language — 202 levels

Start

Python

AI, data science and automation — 220 levels

Start

C# & .NET

Desktop and server applications — 220 levels

Start

Dart & Flutter

Multiplatform mobile applications — 150 levels

Start

React

Modern reactive UIs — 220 levels

Start

Node.js

JavaScript backend and APIs — 220 levels

Start

C++

Modern C++ — STL, templates, threads — 220 levels

Start

C

Low-level C — pointers, memory, systems

Start

Combat System

Your weapons to defeat XANA

XP System

Earn experience with each successful exercise

Badges

Unlock badges as you progress through the modules

Live Editor

Code directly inside the browser

Sound & FX

Immersive sound effects for every action

Puzzles

Code reordering exercises

Quiz

Test your knowledge at every step

Streaks

Maintain your daily learning streak

Dashboard

Track your progress in real time

Your 3 Missions

Complete all 3 blocks to exterminate XANA for good

XANA's Power100%

Each completed block reduces XANA's power by 33%. Complete all 3 to eliminate it.

Fullstack Block

Master complete web development: from front-end to back-end. Build Lyoko's interfaces and the supercomputer's servers.

Web Sector

Front-End(250 levels)Launch JavaScript(402 levels)Launch React(420 levels)Launch Node.js(420 levels)Launch

Mobile Block

Develop mobile apps to communicate with Lyoko from anywhere. The link between the real and virtual worlds.

Mobile Sector

Dart & Flutter(250 levels)Launch

Desktop Block

Program the supercomputer's software. The heart of the machine running Lyoko and combating XANA directly.

System Sector

C# & .NET(420 levels)Launch Python(420 levels)Launch C++(420 levels)Launch

The Story of Project Carthage

Franz Hopper's ultimate project to save humanity

Franz Hopper

A genius scientist, Franz Hopper created the supercomputer and the virtual world Lyoko. His ultimate project: Carthage, a program capable of countering any digital threat.

The virtual world Lyoko composed of digital sectors

The World of Lyoko

Lyoko is a virtual universe composed of digital sectors. This is where the battle against XANA takes place. Every line of code you write strengthens this world's defenses.

XANA, the malevolent artificial intelligence

The XANA Threat

XANA is a malevolent artificial intelligence seeking to destroy Lyoko and invade the real world. Only complete mastery of coding can stop it.

“Coding is your weapon. Lyoko relies on you.”

— Franz Hopper, creator of Project Carthage

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