Mozilla Developer Network
HyperText Markup Language (HTML) is the core language of nearly all Web content. Most of what you see on screen in your browser is described, fundamentally, using HTML. More precisely, HTML is the language that describes the structure and the semantic content of a Web document. Content within a Web page is tagged with HTML elements such as <img>, <title>, <p>, <div>, and so forth.
HTML is an international standard whose specifications are maintained by the World Wide Web Consortium (W3C) and the Web Hypertext Application Technology Working Group (WHATWG). The WHATWG considers HTML a "living standard" which is constantly evolving, whereas the W3C works on both "snapshots" of HTML, the most current of which is HTML5 and on the evolution of HTML (HTML 5.1).
The HTML specification defines a single language that can be written using the relaxed HTML syntax, but also the more strict XML (Extensible Markup Language) one, and also addresses the needs of web applications.
HTML5 does not describe the style and formatting of content, but only the content itself and its meaning. If you want to add style and formatting to your website it is defined and controlled by using Cascading Style Sheets (CSS).
The articles here provide reference materials you can refer to while you develop for the Web, so what are you waiting for?
Documentation about HTML
- Introduction to HTML
- An introductory guide to HTML, including its syntax and usage.
- HTML element reference
- A detailed reference of all HTML elements and their features, capabilities, and compatibility with various browsers.
- HTML attribute reference
- A cheatsheet of all HTML attributes and which elements they can be used with.
- HTML guide
- Guides and tutorial content to help you learn and use HTML with ease.
Related Topics
- The Cascading Style Sheets (CSS) used to give style and formatting to HTML.
- The Document Object Model (DOM) is the representation of an HTML document as a tree of objects.
Getting help from the community
You need help on a HTML-related problem and can't find the solution in the documentation?
- Consult the dedicated Mozilla forum :
- Go to Stack Overflow, a collaboratively built and maintained Q&A site and look if you can find the answer to your question. If not you will be able to ask your question there.
- Join us at IRC.
Don't forget about the netiquette...
Tools for HTML developers
- Recent versions of Firefox include built-in Web Developer tools, such as the Web Console, Page Inspector, Style Editor, and Responsive Design View that assist with developing, debugging, and improving Web pages
- Firefox' Firebug extension, a popular extension of that navigator that allows to edit live CSS on watched sites. Very practical to test some changes, though this extension does much more.
- HTML Validator
- Web Developer Extension
- HTML Tidy
- Pretty Diff