HTML & CSS
The two languages that define what every website looks like — every page on the internet is built on this foundation.
At a Glance
1991
HTML first published
1996
CSS first released
100%
Of websites use HTML
W3C
Standards body
History
From CERN to Every Screen
HTML (HyperText Markup Language) was invented by Tim Berners-Lee at CERN in 1991 as a way to share documents between researchers. The idea was simple: use tags to describe the structure of a document and embed links that connect pages to one another. What started as a tool for scientists quickly became the foundation of the World Wide Web.
CSS (Cascading Style Sheets) arrived in 1996, introduced by Håkon Wium Lie and Bert Bos to solve a real problem: HTML was being cluttered with visual attributes like font tags and alignment settings. CSS separated the structure of a page from its presentation — a principle that still underpins every well-built website today.
Over the decades both languages have evolved dramatically. HTML5 (2014) added native video, audio, canvas, and semantic elements. CSS has grown from basic color rules to supporting animations, custom properties, grid layout, and container queries. Today AI tools can write fluent HTML and CSS in seconds — making them the most accessible entry point into web development for complete beginners.
Why Builders Use It
The Best Starting Point for Domain Builders
If you own a domain and want to put something on it, HTML and CSS are where you start. A static HTML site can be hosted for free on Netlify or GitHub Pages, loads near-instantly, and costs nothing to run. For a domain investor, that means a polished landing page, for-sale page, or content site with zero ongoing infrastructure costs.
HTML and CSS are also the easiest languages to work with using AI tools like Claude or ChatGPT. Describe what you want, and the AI produces working markup you can paste directly into a file and open in a browser. No compiler, no build step, no dependencies. Just a text file with a .html extension.
Understanding HTML and CSS also helps you get more out of every other tool in the web ecosystem — WordPress themes, email templates, Webflow, Squarespace custom code blocks, and any framework you learn next. It's the one investment that pays dividends across your entire building career.
Resources
Useful Links
MDN Web Docs — HTML
The definitive HTML reference from Mozilla. Every element, attribute, and example.
MDN Web Docs — CSS
Complete CSS reference — properties, selectors, layout guides, and browser compatibility.
CSS-Tricks
In-depth CSS guides, flexbox and grid references, and practical tutorials.
CodePen
Online editor to write and preview HTML/CSS in the browser — no setup required.
Content Creators
Learn from the Best on YouTube
Kevin Powell
The go-to creator for CSS. In-depth layout tutorials, modern CSS techniques, and an incredibly patient teaching style.
Traversy Media
Brad Traversy covers HTML/CSS crash courses and full project walkthroughs. Practical, well-paced, and beginner-friendly.
DesignCourse
Gary Simon bridges design and CSS — ideal if you care about how your site looks, not just that it works.
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