
Bienvenue dans la formation dédiée à HTML et CSS, les deux langages qui sont à la base de chaque site web existant sur Internet.
Ici, on ne parle pas de théorie abstraite.
HTML et CSS sont les outils concrets avec lesquels vous allez structurer, styliser et mettre en ligne votre premier portfolio professionnel (de la première balise jusqu'au déploiement en ligne).
Aujourd'hui, savoir créer une page web de A à Z est une compétence fondamentale pour tout développeur.
Cette formation vous apprendra à :
Vous ne serez pas simplement quelqu'un qui copie du code.
Vous comprendrez chaque décision et saurez construire par vous-même.
Une formation 100 % pratique.
Pas de slides interminables.
Vous écrivez votre premier code HTML en 30 secondes. Vous configurez votre environnement professionnel. Vous construisez un vrai portfolio qui évolue session après session, jusqu'à être entièrement responsive et mis en ligne.
À la fin de cette formation, vous serez capable de :
Tout le monde peut copier du code trouvé sur Internet.
Mais seuls ceux qui comprennent vraiment HTML et CSS peuvent créer, adapter et déboguer sans jamais être bloqués.
Chez Believemy, nous ne vous apprenons pas seulement à écrire des balises.
Nous vous apprenons à penser comme un développeur.
Prêt à construire votre premier site web professionnel et à poser des bases solides pour toute votre carrière ? Alors rejoignez cette formation et découvrez comment HTML et CSS peuvent transformer votre rapport au web.
Le point de départ de votre aventure dans le code. Vous découvrirez le portfolio que vous allez construire étape par étape et vous comprendrez concrètement ce que vous serez capable de créer à la fin de la formation.
Une plongée simple et claire dans le fonctionnement réel d’un site web. Vous comprendrez comment HTML et CSS interagissent et vous écrirez vos premières lignes de code en quelques minutes.
You code live in your browser, with BeBot by your side. Nothing to install.
Here's what you'll concretely be able to do.
At the end of this course, you will receive a certification validating your skills in HTML et CSS if you successfully complete all quizzes.

You start with a blank page. By the end of the course, you have a real personal portfolio you can customize, deploy online, and send to recruiters. Not a school exercise, not a throwaway project.
Développeur web junior passionné par la création d'interfaces simples et agréables à utiliser.
À propos de moi
You build this portfolio line by line, step by step, through the interactive challenges. By the end, it's a complete, clean, responsive site you can ship online in a few clicks and share anywhere.
4 complete pages
Home, projects, about, contact. All built for real-world use.
100% responsive
Perfect on phone, tablet, and desktop, nothing breaks.
Fully customizable
Your colors, your projects, your style. It's your portfolio, not a template.
Easy to publish
We show you how to host it easily, with your own domain name.
Spoiler: you don't have to be named Tony Stark.
This course has been entirely rebuilt in 2026 with interactive challenges: you write code directly in your browser, with a built-in editor, live preview, and BeBot, our AI assistant who watches your code in real time and coaches you without ever giving you the solution.
BeBot
Your coach · Online
My check isn't passing, I'm stuck…
Look near your <p> tag. What do you think might be missing?
Ah! Got it. Thanks.
Nice, you found it yourself! That's how you really learn.
BeBot watches your code live, understands your intent, and unblocks you with precise hints. Never the solution. You keep the satisfaction of figuring it out yourself.
You write your HTML and CSS in a real code editor right in your browser, and you see the result update instantly. No more switching between VS Code and your browser.
BeBot sees your code in real time and unblocks you with precise hints, without ever giving you the answer. You really understand instead of just copy-pasting.
Each challenge is automatically graded with line-by-line feedback on what works, what could be improved, and why. You make real progress fast.
HTML sets the structure. CSS transforms everything: colors, typography, layout. Turn it on, turn it off, and see the difference on this portfolio.
Front-end developer
I build modern, fast and accessible websites.
CSS takes over: colors, typography, layout, shadows. The same structure, transformed.
Same HTML, radically different result. That is the power of CSS, and you master it session after session in the course.
Vibe coding with AI is magic… until it gets stuck. And it does. Here is a simple case: a button that refuses to center. Try both approaches.
AI is a fantastic accelerator. But when it gets stuck, the one who understands the code takes back control. HTML/CSS + AI: that is the unbeatable combo.
Learning HTML and CSS is not about doing without AI. It is about no longer being its hostage and becoming the one who drives.
HTML and CSS are not just for portfolios. They are the foundation of literally everything you see on the Internet.
Showcase sites that highlight your work.
Landing pages designed to convert visitors.
Readable, well-structured content sites.
Polished product pages and checkout flows.
Newsletters that look right in every inbox.
Clear, organized data interfaces.
Professional, credible sites for any organization.
The visual layer of every web application.
Google, YouTube, Facebook, Netflix... literally every website is built with HTML and CSS.
Anyone can paste code found online. But only those who truly understand HTML and CSS can create, adapt and debug without ever getting stuck.
You stop copy-pasting without understanding. You think like a developer and build anything you imagine.



Start tonight, move forward whenever you can: the course picks up right where you left off.




Browse the most commonly used terms and definitions in the HTML and CSS field.