Convert DOC to DOCX Online
DOC and DOCX serve different purposes. Convert DOC to DOCX here when you need reports, resumes, contracts, collaborative editing.
How to convert DOC to DOCX
- Upload your DOC file. Drag it onto the box above or click to browse. Files up to 200 MB are accepted.
- Choose DOCX as the output. The target format is pre-selected on this page — just press “Convert now”.
- Download the result. Conversion runs on our own server and the download starts as soon as it is ready. Your files are deleted automatically.
Why convert DOC to DOCX?
People convert DOC to DOCX mainly for compatibility. Modern Word opens it, but DOCX is preferred. DOCX, by contrast, is built for reports, resumes, contracts, collaborative editing, and supported by Word, Google Docs, LibreOffice and Pages.
DOC vs DOCX: key differences
| DOC | DOCX | |
|---|---|---|
| File type | legacy | editable |
| Typical use | legacy Word documents | reports, resumes, contracts, collaborative editing |
| Compatibility | Modern Word opens it, but DOCX is preferred. | Supported by Word, Google Docs, LibreOffice and Pages. |
Tips for a clean DOC to DOCX conversion
- Modern Word opens it, but DOCX is preferred.
- Use the highest-quality source DOC you have — converting a compressed file again cannot restore lost detail.
- If you only need a smaller file, try a lower resolution or bitrate instead of a different format.
- Keep the original DOC until you have checked the converted DOCX opens the way you expect.
Frequently asked questions
How do I convert DOC to DOCX?
Upload your DOC file to the converter on this page, make sure DOCX is selected as the output format and click “Convert now”. When the conversion finishes the download starts automatically.
Is this DOC to DOCX converter free?
Yes — it is completely free and needs no account. Files up to 200 MB are accepted, and heavy use is rate-limited so the service stays available for everyone.
Will converting DOC to DOCX reduce quality?
Because both formats preserve the original data, converting back and forth does not degrade quality.
What is a DOC file?
DOC is the legacy binary Word format used before Office 2007. Its technical name is Microsoft Word 97-2003 and it is typically used for legacy Word documents.
What is a DOCX file?
DOCX is the modern Word format, based on XML and ZIP compression. Its technical name is Office Open XML Document and it is typically used for reports, resumes, contracts, collaborative editing.
Can I convert DOC to DOCX on my phone?
Yes. The converter runs in the browser on Android, iOS, Windows, macOS and Linux — no app installation is required.
Are my files kept on the server?
No. Uploaded files and converted results are deleted automatically a short time after the conversion finishes.