How to open a .docx file?

DOCX files can be opened by most office suites and text editors. You can also convert DOCX to other formats online using SquishConvert.

How to convert a .docx file?

Upload your .docx file to SquishConvert, select an output format, and click Convert. Your converted file will be ready to download in seconds.

Document format

.docx

Office Open XML Document

DOCX is the default format for Microsoft Word documents. It's an XML-based format that replaced the older .doc format, offering better compression, easier recovery, and broader compatibility.

MIME type

application/vnd.openxmlformats-officedocument.wordprocessingml.document

Developer

Microsoft

Introduced

2007

Advantages

Standard format for word processing
Excellent formatting capabilities
Smaller files than legacy .doc format
Compatible with Google Docs, LibreOffice, and more

Limitations

Formatting may vary between applications
Complex internal XML structure
Requires office software to edit properly
Version differences can cause compatibility issues

When to use DOCX

Business reports and memos

Academic papers and essays

Resumes and cover letters

Collaborative document editing

Technical details

DOCX is a ZIP-compressed package of XML files following the OOXML (Office Open XML) standard (ISO/IEC 29500). It contains document.xml, styles.xml, and media files in a structured directory.