docx 是微软开发的基于 xml 的文字处理文件。docx 文件与 doc 文件不同, 因为 docx 文件将数据存储在单独的压缩文件和文件夹中。早期版本的 microsoft office (早于 office 2007) 不支持 docx 文件, 因为 docx 是基于 xml 的, 早期版本将 doc 文件另存为单个二进制文件。

DOCX is an XML based word processing file developed by Microsoft. DOCX files are different than DOC files as DOCX files store data in separate compressed files and folders. Earlier versions of Microsoft Office (earlier than Office 2007) do not support DOCX files because DOCX is XML based where the earlier versions save DOC file as a single binary file.