HTML

Every page starts from a fixed skeleton — get it right and the rest comes easy.

Most web content is text — headings and paragraphs are the tags you'll use most.

Links are what connect the web together, and images bring content to life.

Lists organize information and power navigation menus and sidebars.

Semantic tags tell browsers and search engines the meaning of each part, not just its look.

Forms are the main way you collect user input — from login to checkout.

HTML can validate input without JavaScript — the simplest first line of defense.

Tables fit real tabular data — use them correctly to avoid hurting accessibility.

Video and audio are core to the modern web — learn to embed them properly.

Your site should work for everyone — including screen reader and keyboard users.

Correct metadata makes your page rank better and look right when shared on social media.

Clean, valid HTML saves you countless headaches in maintenance and development.