A DOCX file is a Microsoft Word Open XML Format Document file. Open with Word, Word Online, Google Docs, or some other word processor.

Why can't I open DOCX files?

It sounds like you already have the Office Compatibility Pack installed. Try changing this setting: Control Panel> Folder Options> File types> Advanced> for DOC and DOCX, uncheck "Browse in same window." OK your way out.

How do I open a DOCX file without Microsoft Office?

Install LibreOffice, a free and open-source office suite. This is an alternative to Microsoft Office. LibreOffice Writer, which is included, can open and edit Microsoft Word documents in DOC and DOCX format. Upload the document to Google Drive and open it in Google Docs, Google's free web-based office suite.