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| Name | HTML | DOCX |
| Full name | HTML - Hypertext Markup Language | DOCX - Office Open XML Document |
| File extension | .html, .htm | .docx, .docm |
| MIME type | text/html | application/vnd.-openxmlformats-officedocument.-wordprocessingml.-document |
| Developed by | W3C & WHATWG | Microsoft |
| Type of format | Document file format | Document file format |
| Description | HyperText Markup Language, commonly referred to as HTML, is the standard markup language used to create web pages. Along with CSS, and JavaScript, HTML is a cornerstone technology, used by most websites to create visually engaging web pages, user interfaces for web applications, and user interfaces for many mobile applications. | The Office Open XML file formats are a set of file formats that can be used to represent electronic office documents. There are formats for word processing documents, spreadsheets and presentations as well as specific formats for material such as mathematical formulae, graphics, bibliographies etc. |
| Technical details | HTML elements form the building blocks of all websites. HTML allows images and objects to be embedded and can be used to create interactive forms. It provides a means to create structured documents by denoting structural semantics for text such as headings, paragraphs, lists, links, quotes and other items. | Office Open XML documents are stored in Open Packaging Convention (OPC) packages, which are ZIP files containing XML and other data files, along with a specification of the relationships between them. Depending on the type of the document, the packages have different internal directory structures and names. |
| Associated programs | Mozilla Firefox, Opera, Google Chrome, Internet Explorer. | Microsoft Office, LibreOffice, Kingsoft Office, Google Docs. |
| Wiki | https://en.wikipedia.org/wiki/HTML | https://en.wikipedia.org/wiki/Office_Open_XML_file_formats |