Convert WORD to DOCX online for free
1: Choose multiple local WORD files or enter the URL of an online WORD file. 2: Choose "DOCX" as target format and set options. 3: Click the "START CONVERSION" button to convert WORD files to DOCX online.
Choose filesChoose files or enter remote file URLenter remote file URL
Set conversion options (optional)
Microsoft Word Binary File Format
File extension: .doc
DOC is a filename extension for word processing documents, most commonly in the proprietary Microsoft Word Binary File Format. In Microsoft Word 2007 and later, the binary file format was replaced as the default format by the Office Open XML format, though Microsoft Word can still produce DOC files.
Office Open XML Document
File extension: .docx, .docm
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.