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.
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.
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.
How to Convert DOC to DOCX
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?
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Convert DOC to DOCX NowPro 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.
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Our converter handles all DOC files automatically with no quality loss.
Files are processed securely and deleted after 1 hour for your privacy.
Convert DOC to DOCX Now