Step 1: Drop your DOC files using the button above or by deposit and leave.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Receive your converted DOCX files.
DOC to DOCX Conversion FAQ
Is the DOC to DOCX converter free?
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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 the older binary Office format still a safe bet?
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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.
What is a DOCX file underneath?
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A ZIP archive of XML parts, together with the images and fonts those parts refer to. That is why one barely shrinks when it is archived, why a damaged one can sometimes be partly recovered instead of being a total loss, and why software that is not the original application can open it at all — the layout was published rather than reverse-engineered. It is also why the extension matters more than it looks: rename it and the tools that recognise it by name stop opening it, though not a byte inside has changed. DOCX is Office Open XML, the format Word has produced by default since 2007 and an ISO standard since 2008.
Why convert between DOC and DOCX when they are the same kind of file?
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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.
How big a DOC file can I convert to DOCX?
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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 convert many DOC files to DOCX at once?
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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.
Does the DOC to DOCX converter work on phones and tablets?
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Yes — the UI is responsive and the conversion pipeline runs server-side, so mobile devices upload-then-download just like desktops. iOS and Android browser file pickers (camera roll, Files app) work end-to-end.
Which browsers does the DOC to DOCX converter support?
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Chrome, Firefox, Safari (15+), Edge, and Opera. The converter uses standard `<input type="file">` upload — no WebAssembly or PWA dependencies — so even older browsers work.
Are my DOC files kept private?
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Yes. Uploaded DOC files are processed on our own servers and are never viewed or shared. Uploads and results are deleted automatically about 24 hours after conversion. See /privacy/ for the full policy.
What if the DOCX download doesn't start automatically?
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Disable any pop-up blocker, then click the download button manually. The result link stays active for 24 hours, so if your network fails mid-download, you can re-trigger from the result page without re-uploading the DOC.
