Doc and DocX documents are the main formats of the Microsoft Word editor and one of the most common text file formats. Microsoft Word (MS Word, WinWord, or simply Word) is a text editor designed for creating, viewing, and editing text documents. Unlike other text formats, for example, RTF (Rich Text Format File), the internal content of the document is more complex and Word documents allow you to store not only text, but also graphics, tables, videos, and many other elements.