How to Convert DOC to DOCX

Convert DOC to DOCX Online

DOC is the old binary Word format from the 1990s. Converting to DOCX gives you the modern XML-based format that works with all current Office applications.

Our converter handles all DOC files from Word 97/2000/2003 and produces fully compatible DOCX output.

DOC

What is DOC?

DOC is Microsoft Word's older binary file format used in Word versions before 2007. It stores document data as binary code that only specific versions of Word fully understand.

DOC files have limited compatibility with modern applications. Google Docs, LibreOffice, and Word 365 all work better with the newer DOCX format.

DOCX

What is DOCX?

DOCX uses the Office Open XML standard (an ISO standard), storing document content as XML inside a ZIP archive. This open format is supported by every modern word processor.

Converting DOC to DOCX ensures your document displays correctly in all modern applications and can be easily opened by collaborators on any platform.

Why Convert DOC to DOCX?

Modern Compatibility

DOCX works perfectly in Word 365, Google Docs, LibreOffice, and Pages.

Better Collaboration

DOCX files are typically smaller than equivalent DOC files due to better compression.

Smaller Files

DOCX files are typically smaller than equivalent DOC files due to better compression.

Future Proof

DOCX is an open ISO standard that will remain supported for decades.

Upload DOC

Select your old DOC file.

Choose DOCX output

Select DOCX as your output format.

Convert

Click convert. The conversion preserves all formatting, styles, and content.

Download DOCX

Save your modern DOCX file.

Ready to Convert DOC to DOCX?

Use our free online converter. No signup, no watermarks, no limits.

Convert DOC to DOCX Now

Pro Tips

Check formatting after conversion

Review the converted DOCX for any formatting changes, especially with complex layouts.

Update your default format

Set Word to save as DOCX by default: File > Options > Save > Save files in this format.

Keep DOC backups

Keep the original DOC files in case you need to open them in legacy systems.

Frequently Asked Questions

What is the difference between DOC and DOCX?

DOC is the older binary format (Word 97-2003). DOCX is the newer XML-based format (Word 2007+). DOCX has better compatibility and smaller file size.

Will formatting be preserved when converting DOC to DOCX?

Yes, formatting is preserved. Complex layouts with legacy features may have minor differences.

Can I open DOCX in older Word versions?

Word 2007 and later open DOCX natively. Word 2003 needs the Microsoft Office Compatibility Pack.

Does Google Docs support DOC format?

Google Docs can open both DOC and DOCX. DOCX generally converts more accurately.

Should I always use DOCX instead of DOC?

Yes, for all new documents use DOCX. Only use DOC if specifically required for compatibility with legacy systems.

Need More Help?

Our converter handles all DOC files automatically with no quality loss.

Files are processed securely and deleted after 1 hour for your privacy.