All files related to websites and web servers belong to this category, both static and dynamic pages, web applications, and files referenced by web pages. Moreover, files that are created by web development software also fall under this category.
Popular Internet File Extensions
- HTML — Format: Text
The HTML or Hypertext Markup Language File format is the most widely used format for displaying web pages. It uses tags to organize data, which can then be styled using a CSS file, or Cascading Style Sheet. It is capable of displaying text, images, links to other website addresses, animated content, and more. While you can open and view the contents of a “.HTML” file with a text editor, only browsers can parse the HTML source code and display it as intended.
- CSS — Format: Text
A CSS or a Cascading Style Sheet format is used to style an HTML page, from font size to colors to positioning of elements and more. Basically, it is responsible for telling the browser how to exactly display the HTML content. Without it, all you would see is plain text on a blank background.
- PHP — Format: Text
A PHP file contains the source code written in PHP, a popular server-side scripting language intended for web development. It can contain anything from PHP functions to variables, forms, database access, etc.
- ASP — Format: Text
Developed by Microsoft, files with the ASP or Active Server Page extension are basically HTML web pages but with Microsoft's server-processed script involved. The script is first processed on a Microsoft Web Server before making its way to the user.
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