Document Object Model (DOM) is a form of representation of structured documents as an object-oriented model. DOM is the official World Wide Web Consortium (W3C) standard for representing structured documents in a platform-and language-neutral manner.

DOM was initially supported by web browsers to manipulate elements in a HTML document. DOM was a way of dynamically accessing and updating the content, structure and style of documents using scripting languages such as JavaScript. Owing to incompatibilites in the DOM implementation between different browsers, the W3C came up with standard specifications for DOM. The foundation of the specifications was based on XML which at the time was emerging as a competitor to HTML in the area of structured languages.