Convert DOC to DOCX Files Online for Free.
Free online tool to convert doc to docx files quickly and securely. No installation required – start converting your files in just a few clicks!
Drag and drop your files here or click to upload.
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Maximum file size is 10MB
Convert DOC to DOCX Online for Free
The easiest way to convert DOC files into DOCX format — in seconds.
DOC is a proprietary document format developed by Microsoft for its word processing application, Microsoft Word. It was the default file format for Word documents from Word 97 to Word 2003. It’s typically used in DOC (Microsoft Word Document)?.
DOCX is a modern file format used by Microsoft Word to create and store documents. It is based on XML (Extensible Markup Language) and supports rich text, images, charts, tables, and various multimedia elements. Commonly found in DOCX (Microsoft Word Document)?.
Why Convert DOC to DOCX?
- To avoid needing specific apps to open the file.
- To ensure your file size is smaller for faster sharing.
- For collaboration and easy editing.
- To make files easier to open across devices.
Benefits of This Conversion
- Improved compatibility across browsers and apps.
- Better organization by converting to standard formats.
- More secure sharing and reduced editing risk.
- Faster upload and download speeds.
Use Case Scenarios
- You're sending a DOC resume and want it as a DOCX to lock formatting.
- Your website needs a lightweight version of your DOC to upload as DOCX.
- You’re importing spreadsheet data from DOC into a system that only accepts DOCX.
Conversion Tips
- Always back up your original file before converting.
- Use high-resolution files for best quality results.
- Avoid converting lossy formats multiple times.
Programs That Open DOCX Files
- DOCX files can be opened using Microsoft Word, which is the default application for this format. Other word processing programs such as LibreOffice Writer, Google Docs, and Apple Pages also support DOCX files.
- If you don't have any word processing software, you can open DOCX files using free online tools like Google Docs or online document viewers.
Did You Know?
- Did you know? PDF stands for Portable Document Format.
- MP3 compression can reduce file size by up to 90%.
- JPG is the most widely used image format online.
Useful Resources
How It Works
How to Convert DOC to DOCX
Click inside the file drop area to upload your DOC file or drag & drop it.
Select DOCX as the output format and click the 'Convert' button.
Download the converted DOCX file instantly after conversion.
You can also send a link to the converted file via email. (Optional)
Protecting Your Data is Our Top Priority
At RunConvert, we prioritize your data's security during every file conversion. Our advanced encryption protocols ensure that your files are protected throughout the entire process. Whether you're converting documents, images, or audio files, we host all our operations in secure data centers with constant monitoring, ensuring the safety of your information. We are committed to protecting your privacy by never storing your files longer than necessary and never sharing your data with third parties. With RunConvert, you can trust that your files are handled with the highest level of security, giving you peace of mind with every conversion.
End-to-End Encryption
Your files are encrypted from upload to delivery with AES-256 encryption standards.
- Zero-knowledge architecture
- TLS 1.3 protocol
Secure Access Control
Multi-factor authentication and role-based access management for your entire organization.
- SAML & SSO integration
- Audit logging
Protected Storage
Redundant, encrypted storage systems with geo-distributed backups and disaster recovery.
- 99.99% uptime SLA
- Automatic failover
File Verification
Automated integrity checks and malware scanning on all files before processing.
- Real-time threat detection
- Version control
Security Certifications & Compliance
We maintain the highest industry standards for data protection
How would you rate your experience with our service?
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What Our Users Say
Don't take our word for it – here's what users think about Runconvert.
Saved me hours of work
I had to convert multiple PDFs to Word for editing. This tool made it so easy and preserved all the formatting perfectly. The batch processing feature is a game changer.
Michael T
Professional quality
As a graphic designer, I need reliable conversion tools. This site delivers professional quality every time. The image conversions maintain resolution and color accuracy.
Elena R
Fast and reliable
I've tried many conversion tools but this one is by far the fastest and most reliable. No watermarks, no quality loss, and the interface is so intuitive.
David K
Rated 4.5/5 based on 5400+ reviews. Showing our latest reviews.