DOCX is a document file format used by Microsoft Word, introduced as part of the Office Open XML standard. It supports rich formatting, images, tables, and more. DOCX files are smaller than older DOC files and offer better compatibility across platforms, making them a popular choice for professional documents.
HTML is the standard markup language used for creating web pages and applications. It structures content on the web, including text, images, links, and multimedia. HTML files are interpreted by web browsers to render web pages, making them essential for web development and content management.