.DOCX File Extension
Zip-compressed XML document format created by Microsoft Word.
application/vnd.openxmlformats-officedocument.wordprocessingml.document
50 4B 03 04 (PK.. Zip archive)
Format Architecture & Technical Specifications
DOCX is the default document file format used by Microsoft Word 2007 and newer. It is an open XML-based archive containing document text, formatting, images, tables, and embedded media.
How to Open .DOCX Files
1 Google Docs Online
Upload .docx to Google Drive and open with Google Docs for instant free editing.
2 LibreOffice Writer
Install free open-source LibreOffice to edit Word files natively.
Compatible Software Programs
Microsoft Word 365
windows, mac, android, ios • Commercial
Google Docs
windows, mac, linux, android, ios • Free
LibreOffice Writer
windows, mac, linux • Free
Apple Pages
mac, ios • Free
Security Considerations & Verification
Standard DOCX files cannot contain macros (DOCM format handles macros). Low risk.
- Rename .docx extension to .zip and extract document.xml to recover raw document text.
- Use Word built-in "Open and Repair" feature under File > Open menu.
Frequently Asked Questions
What is a .DOCX file?
A .DOCX file is a Microsoft Word Open XML Document associated with Documents. Zip-compressed XML document format created by Microsoft Word.
How do I open a .DOCX file on Windows or Mac?
You can open .DOCX files using Microsoft Word 365, Google Docs, LibreOffice Writer, Apple Pages. If you do not have native software installed, you can use AnyFileX's free File Identifier or convert .DOCX to a standard format in your browser.
Is a .DOCX file safe to open?
This format carries a safety rating of Low Risk. Standard DOCX files cannot contain macros (DOCM format handles macros). Low risk.
Can I convert a .DOCX file to other formats?
Yes! .DOCX can be converted to formats such as .PDF, .TXT directly in your web browser.
What should I do if a .DOCX file is corrupted or won't open?
If your .DOCX file displays an invalid header or signature error, check its magic bytes hex header (50 4B 03 04 (PK.. Zip archive)) using AnyFileX's Magic Byte Detector or follow our step-by-step file repair guide.