What is the file extension for hypertext markup language documents?

The file extension for hypertext markup language documents is .html. This extension is universally recognized by web browsers to indicate that the file contains HTML code, which is used to structure content on the web. HTML documents can include elements such as headings, paragraphs, links, images, and other multimedia, all formatted through the use of HTML tags.

Using the .html extension ensures that web servers and browsers treat the file appropriately, resulting in the correct display of the content when accessed online. This standardization is essential for web development, as it allows developers to create and share web pages that can be easily rendered by all major browsers.

Other file extensions provided, like .xml, .css, and .js, represent different types of files used in web development. XML is used for storing and transporting data, CSS is used for styling HTML documents, and JavaScript (js) is used for adding interactivity to web pages. Each plays a unique role in web development, but none serve the same function as the .html extension.