Convert DOC to DOCX online in seconds — free, with no sign-up. DOCX is lossless and ideal for editing and collaborating on documents. Your files are encrypted and deleted automatically after 24 hours.
DOCX
Microsoft Word — Word's editable format storing text, styles, images and tables as XML.
How to convert DOC to DOCX
- 1Upload your DOC file
Click “Choose a file” or drag and drop your DOC file onto the page — no sign-up or email needed.
- 2Convert to DOCX
DOCX is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your DOCX file
Your DOCX file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
DOC vs DOCX
| DOC | DOCX | |
|---|---|---|
| Full name | Microsoft Word (legacy) | Microsoft Word |
| Type | Document | Document |
| Compression | Lossless | Lossless |
| Best for | opening legacy Word files; converted to DOCX or PDF | editing and collaborating on documents |
Frequently asked questions
Does converting DOC to DOCX lose quality?
Converting DOC to DOCX preserves your text, images and most formatting. Very complex elements — macros, live formulas or unusual fonts — may not carry over perfectly, but the content stays intact.
What's the difference between DOC and DOCX?
Microsoft Word (legacy) (DOC) is lossless and best for opening legacy Word files; converted to DOCX or PDF. Microsoft Word (DOCX) is lossless and best for editing and collaborating on documents. Convert DOC to DOCX when you need a document for editing and collaborating on documents.
Is the DOC to DOCX converter free?
Yes — converting DOC to DOCX is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my DOC files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert DOC to DOCX on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert DOC to DOCX?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert DOC files to?
Besides DOCX, you can convert DOC to HTML, ODT, PDF, RTF, TXT and more — see the full list of DOC conversions below.
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Last updated July 2026