Step 1: Supply your DOC files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted DOCX files.
DOC to DOCX Conversion FAQ
What does the DOC to DOCX converter do?
+
It converts a DOC document into DOCX. Text, paragraph styles, tables, and embedded images are preserved as closely as the target format allows.
Will the formatting of my DOC survive the conversion to DOCX?
+
Headings, paragraph styles, tables, and embedded images carry across. Advanced layout (text boxes, complex columns, macros) may simplify when DOCX does not support the feature one-for-one.
Is the DOC to DOCX conversion reversible?
+
You can convert the DOCX back to DOC on this site. If either format involved is lossy, the round-trip is not bit-perfect even though it is visually or audibly close.
What output quality should I expect from DOC to DOCX?
+
Default settings target broadcast / web quality — visually identical to the source for most viewers. For archival use, pick the highest quality option in the converter settings.
Is the older binary Office format still a safe bet?
+
It opens everywhere, but it is a compatibility choice rather than a good one. The binary formats predate the XML packages, carry macro payloads that many mail servers strip on sight, and are being steadily deprecated by Microsoft itself. Use them when a specific piece of old software demands them, and the XML format otherwise. DOCX still reflows differently between renderers, so a document that paginates correctly in Word can shift in LibreOffice or Google Docs.
Why convert between DOC and DOCX when they are the same kind of file?
+
Because the file has to open on the other end, and version and vendor differences decide whether it will. Two formats in the same family can still be years apart in what software reads them, how large they are on disk, and which features they carry. The conversion normalises the file onto whichever one the recipient actually supports. DOC is the binary Microsoft Word format used from Word 97 through Word 2003. DOCX is Office Open XML, the format Word has produced by default since 2007 and an ISO standard since 2008.
Is there a file-size limit when converting DOC to DOCX?
+
Free conversions have a size limit per file, set by the type of file, and the page tells you when a file is over it. A paid plan removes that limit, so much larger files can be converted.
Can I batch-convert several DOC files to DOCX at once?
+
Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
What happens to my DOC files after the conversion?
+
Uploaded files are processed on our own conversion servers, nobody looks at them, and they are not shared. The upload and the converted file are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
Do I need to install software to convert DOC to DOCX?
+
No. The converter runs entirely in your browser plus our cloud — no plugin, no install, no admin rights. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.
Do I need an account to convert DOC to DOCX?
+
Yes. One conversion an hour is free, with no account needed, for a file within the free size limit. A paid plan removes the hourly limit and the size limit, and lets you add several files to one job.
Is there an API for DOC to DOCX conversion?
+
Yes. Every conversion this site offers is also exposed via a JSON API — see /api/ for endpoints, authentication, and rate limits. DOC to DOCX is one of the supported pairs.
