HTML (HyperText Markup Language)
Mike Taylor May 29, 2026 Reading time ≈ 5 min
What is HTML
HTML (HyperText Markup Language) is a standardized markup language for documents, used to create and present content on the Internet. HTML lets you structure information — for example, texts, images, and links to other pages or files — using tags. Tags are special words or symbols enclosed in angle brackets that tell the browser how to display content or how to interact with it.
Every HTML document begins with a document type declaration <!DOCTYPE html>, followed by the root element <html>, inside which the <head> element (containing metadata about the page, such as its title and links to styles or scripts) and the <body> element (containing the actual page content) are placed.
What HTML code consists of
HTML code is made up of the following main components:
- Tags. The basic building block of HTML. Tags define the beginning and end of elements in a document. They are surrounded by angle brackets, for example
<p>for a paragraph. Most tags require a closing tag (for example,</p>), but there are also self-closing tags, such as<img>for images. - Elements. Consist of an opening and a closing tag, along with the content between them. For example, in
<p>This is a paragraph.</p>, the whole block is a paragraph element. - Attributes. Provide additional information about an element, such as an identifier, a class, links to sources, and dimensions. Attributes are always located in the opening tag. For example,
<img src="image.jpg" alt="Example image">where src and alt are attributes of the img element. - Comments. Used to insert notes into the code that are not displayed in the web browser. Comments help developers understand the code and remember important information. The comment syntax is:
<!-- Comment -->. - Text. The actual content that will be displayed on the web page. Text can be placed inside various elements, such as headings (
<h1>), paragraphs (<p>), and lists (<ul>,<ol>). - The DOCTYPE declaration. Defines the version of HTML or the DTD (document type definition) with which the page is intended to be displayed. For example, HTML5 uses
<!DOCTYPE html>. - Structural elements. Define the structure and layout of the page. They include elements such as
<header>,<footer>,<nav>,<section>,<article>, and<aside>, which help create a semantically organized document structure. - Multimedia and interactive elements. Allow you to insert images (
<img>), video (<video>), audio (<audio>), and also forms (<form>) for interactive engagement with the user.
Together, these components form the HTML code that the browser interprets to display the web page. HTML code can be simple, consisting of a few lines to display text, or very complex, containing thousands of lines of code with numerous interacting elements and structures.
HTML (HyperText Markup Language) is a markup language used to create the structure of web pages and web applications. It lets developers embed text, images, video, forms, and other content into documents intended to be displayed in web browsers. Here is an overview of what you can and cannot do with HTML:
What you can do with HTML:
- Structure a web page. Use various tags to create headings, paragraphs, lists, tables, and other structural elements of the page.
- Embed media. Include images (
<img>), audio (<audio>), video (<video>), and objects (for example, via<object>,<embed>, or<iframe>) in pages. - Create forms to collect data. Use forms (
<form>) with various input elements (<input>,<textarea>,<button>,<select>) to gather information from users. - Organize links. Create hyperlinks (
<a>) for navigation between pages within a site or to external resources. - Structure data. Use tables (
<table>) to organize data in a structured way. - Semantic markup. Apply semantic elements (
<article>,<section>,<nav>,<header>,<footer>) for better organization and accessibility of content.
What you cannot do with HTML alone:
- Styling. You cannot apply styles or change the appearance of elements without using CSS. HTML is responsible for structure, while CSS is responsible for style.
- Programming logic. HTML does not let you create interactive elements or program the logic of web applications. JavaScript is required for that.
- Server-side data processing. HTML cannot process data on the server. Programming languages such as PHP, Python, Ruby, and others are used to process forms, access databases, and run server-side logic.
- Creating dynamic content. HTML does not support creating dynamically changing content without interacting with CSS and JavaScript. JavaScript is required for animations, changing content without reloading the page, and other dynamic elements.
- Storing data. HTML does not provide mechanisms for storing user data between sessions. Cookies, localStorage, and sessionStorage combined with JavaScript, or server-side technologies, are used for that.
In the end, HTML is the foundation for creating web pages, but to build full-fledged web applications, apply styling, and add interactivity, it must be used together with CSS and JavaScript.
Conclusion
HTML is a fundamental markup language that serves as the backbone for creating and structuring web pages and web applications. It lets developers embed text, images, video, forms, and other content elements, forming the basic structure of any website. Despite its limited capabilities for styling and interactivity, HTML remains an integral part of web development, acting as the foundation on which more complex web technologies are built.
In addition, the proper use of semantic markup and HTML standards contributes to improved search engine optimization (SEO), helping search engines better understand and index the content of web pages.
Overall, HTML remains a consistently important tool in the web developer's arsenal, providing the foundation for the web as we know it today. It underlies countless websites and continues to evolve, adapting to new requirements and technologies in the world of web development.
Published: May 29, 2026