Free · No signup · Files deleted after 1h

DOC to DOCX
Converter

Modernise a Word 97-2003 file to the current DOCX format — so it opens cleanly in Word, Google Docs and Office 365.

Convert DOC to DOCX free →

No account needed · Up to 25 MB free · Files permanently deleted after 1 hour

Bring old files forward
The binary .doc format is from 1997. Converting to DOCX makes the file smaller, safer and fully compatible with today's Word, Google Docs and LibreOffice.
Private & secure
Uploaded over HTTPS, processed on EU servers, never shared with third parties, and permanently deleted after 1 hour. Never used to train AI.
No software needed
No download, no install, no plugins. Works in any browser on any device — Windows, Mac, Linux, phone or tablet.

How it works

1
Upload your DOC
Drag and drop the .doc file, or click to browse.
2
Choose DOCX
Select DOCX in the format picker — or PDF if you want a locked, shareable copy instead.
3
Download the DOCX
Ready in seconds — the download link is valid for 15 minutes.

Common questions

Why convert DOC to DOCX at all?

DOCX is the format Word has used since 2007: files are smaller (it's compressed XML), less corruption-prone, and supported by every modern editor. Some newer tools refuse the old binary .doc entirely.

Will tracked changes and comments survive?

The mainstream document features — styles, tables, images, headers, footnotes — convert faithfully. Exotic macro content (.doc with embedded VBA) does not carry over; macros are deliberately not preserved.

Can I go the other way, DOCX to DOC?

We deliberately don't offer that — downgrading to the 1997 format loses features and helps nobody. Convert to PDF instead if you need something universally readable.

Is there a file size limit?

Free users can convert files up to 25 MB without an account. Pro raises that to 500 MB per file with 3,000 credits a month; Business goes to 5 GB.

Related converters
DOC → PDF DOCX → PDF Repair Office file PDF → Word