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DOC to DOCX Converter
Convert Word (DOC) (.doc) to Word (DOCX) (.docx) via a free public conversion API from the browser. UniConvert is come-convert-leave: no account and no permanent file library.
Open the interactive DOC to DOCX Converter (loads automatically when JavaScript is available).
How to convert DOC to DOCX
- Step 1. Choose a .doc file from your device.
- Step 2. Confirm the output format is .docx — this page is already set to DOC → DOCX.
- Step 3. Start the conversion, then preview, copy, or download the .docx result. Nothing is kept for later.
Why convert DOC to DOCX here
- DOC → DOCX uses a free public API called directly from the page — no UniConvert servers in the middle.
- Category: Office — Word, Excel, and PowerPoint conversions with fidelity noted when partial.
- No signup, no subscription, and no permanent storage of your files on UniConvert.
- Status: available now.
DOC to DOCX FAQ
Is this DOC to DOCX converter free?
Yes. UniConvert does not require an account for DOC → DOCX. Ads may appear to keep the site free.
Do you store my Word (DOC) files?
Files for this pair are sent to the free conversion provider for processing and are not stored by UniConvert afterward.
What is the difference between .doc and .docx?
.doc is treated as the input format and .docx as the output. Use this page when you specifically need Word (DOC) → Word (DOCX) rather than a generic upload form.
Can I convert other formats in Office?
Yes — open the Office category for other pairs, or use Convert a file to pick any available source and target.
Is office layout preserved for DOC → DOCX?
Layout fidelity depends on the conversion path. Complex documents may look different from Microsoft Office or LibreOffice.