PDF vs DOCX
How do PDF and DOCXcompare? Here's everything you need to know to choose the right format — and how to convert between them.
Portable Document Format
PDF is the universal standard for sharing documents. It preserves formatting, fonts, and layout across all devices and operating systems. From contracts to resumes, PDF is the format the world relies on.
.docx
Full guide →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.
| Specification | DOCX | |
|---|---|---|
| Full name | Portable Document Format | Office Open XML Document |
| Extension | .docx | |
| MIME type | application/pdf | application/vnd.openxmlformats-officedocument.wordprocessingml.document |
| Category | Document | Document |
| Developer | Adobe Systems | Microsoft |
| Year introduced | 1993 | 2007 |
PDF advantages
- Consistent display on all devices
- Supports digital signatures and forms
- Compact file sizes with good compression
- Industry standard for official documents
PDF limitations
- Difficult to edit without specialized software
- Not ideal for responsive or reflowable content
- Can be large with embedded fonts and images
- Accessibility can be poor if not properly tagged
DOCX advantages
- Standard format for word processing
- Excellent formatting capabilities
- Smaller files than legacy .doc format
- Compatible with Google Docs, LibreOffice, and more
DOCX limitations
- Formatting may vary between applications
- Complex internal XML structure
- Requires office software to edit properly
- Version differences can cause compatibility issues
Which should you use?
Use DOCX when you need to edit the document. Use PDF when you need to share a finished document that looks the same everywhere. Most workflows involve creating in DOCX and distributing as PDF.
Best uses for PDF
Best uses for DOCX
Convert between PDF and DOCX
Need to switch formats? Convert for free with SquishConvert.