If your Word download from the WYSIWYG HTML Editor is named content.doc and you expected a .docx, that is not a failed export. The editor lists Word (.doc) as an export option, not .docx. The site’s Markdown to Rich Text tool documents its own Word download as an HTML-based .doc file, not .docx. I expect the visual editor’s file to follow the same pattern, so an HTML based doc file not docx Word export is markup under a .doc name, and that does not match the Office Open XML package a .docx requires.
Renaming the file will not fix it. The dependable route is to open the file in desktop Word, check how it looks, and use Save As or Save a Copy to create a real .docx. The editor’s page does not describe the file’s internals, so I also show a quick way to check your own download. Details were checked on November 1, 2026.
Table of Contents
What an HTML Based Doc File Not Docx Word Export Contains
Three different things can end up with a Word-looking name, and mixing them up causes most of the confusion.
| File | What is inside | Native Word format? |
|---|---|---|
Legacy Word .doc | A separate older Word file format | Yes, the older one |
HTML-based .doc | HTML markup saved under a .doc name so Word can open it | No |
.docx | An Office Open XML package: a ZIP archive of document parts and relationships | Yes, the current one |
The visual editor’s export list names Word (.doc) but does not say what the file contains. The Markdown to Rich Text page does state that its Word download is an HTML-based .doc file, not .docx. I expect content.doc from the visual editor to behave the same way, but that is an inference, not something the editor’s page documents. You can confirm it on your own download by opening the file in a plain text editor: readable HTML tags near the start point to markup and not a binary or ZIP package.
An HTML-based file should not be described as a native legacy .doc either. It is closer to a web page that Word can open. Microsoft describes a .docx as an Open XML package, so the two formats differ in structure, not only in name.
Why Renaming content.doc to content.docx Does Not Convert It
A file extension is a label. Changing it does not rewrite the bytes. A real .docx is a ZIP archive with a content types part, relationships and a main document part. If your export is plain markup, a renamed copy would be HTML inside a file that claims to be an archive, so Word may be unable to open it or may warn about it. I have not verified Word’s exact message, so treat that as a likely outcome, not a promise.
If you are comfortable with a terminal, you can inspect your own export without renaming anything. These commands only read the file:
head -c 300 content.doc unzip -l content.doc
The first command prints the start of the file as text. For an HTML-based file you would expect to see markup. The second command lists archive contents. A genuine .docx typically shows package parts such as word/document.xml, while a plain markup file is typically reported as not being a ZIP archive. This is a quick inspection aid, not a validation of the file. Run it only on files you exported yourself.
The takeaway: renaming changes the label, while Save As in Word rewrites the document into the format you choose.
Open, Inspect and Save as .docx in Desktop Word
This is the dependable workflow. It uses desktop Word, because that is where you can choose the output format.
- Download the file from the editor’s Word export and keep the original
content.docunchanged. - Open desktop Word, then use File > Open and select the file, instead of renaming it.
- If Word shows a prompt asking you to confirm the format, continue only if the file came from your own export. Do not open an unexpected file just because it has a familiar name.
- Inspect the result: headings, lists, links, images and spacing. The visual editor has no tables, so table checks only matter if you added them in Word.
- Choose File > Save As or Save a Copy, and select Word Document (
.docx) as the file type. - Close the new file, reopen it, and check it again.
Choosing Word Document (.docx) in the Save As file type list is what writes a real .docx package. Menu names can differ between Word versions, so look for the file type list if the wording on your screen is slightly different. I would not promise that every piece of HTML styling survives unchanged. Word interprets the markup in its own way, so treat the first open as a review pass, not a guarantee.
Reopening the saved file matters because it shows the .docx loads on its own, not just that Word still has the earlier version in memory.
Word for the Web Is a Separate Compatibility Question
Browser-based Word and desktop Word are different products with different file support, so a result in one does not predict the other. Microsoft’s Word-for-the-web documentation lists .doc among the formats it can display and says it creates a .docx copy for editing in the browser. The same documentation says HTML files are not supported.
That leaves a gap. The documented handling covers a genuine legacy .doc. It does not establish that an HTML-based file carrying a .doc extension will open in every upload workflow. I am not claiming such uploads always fail. I am saying the documentation does not promise they will work, and some systems check the contents, not just the extension.
If you need a dependable .docx upload, make and inspect the .docx in desktop Word first, then upload that file. If you have no desktop Word, upload a small sample in your own workflow before depending on the export for important content.
This also applies to any form, portal or review system that asks for a Word file. If it requires .docx, give it the saved copy and not the original export.
What to Check After You Save the .docx
A successful Save As proves the container is now a .docx. It does not prove the content is right. Check these items before you send the file on:
- Headings: confirm heading levels still read as a sensible outline.
- Lists: check bullets and numbering, and confirm nested items still sit at the level you intended.
- Links: hover each one and confirm the destination. Relative addresses deserve extra care, and a separate article explains why relative Markdown links can be lost when copying rich text to Word. That article covers a copy and paste workflow, so use it as a reminder to check links, not as a description of this export.
- Images: make sure each one displays and still makes sense without surrounding text.
- Spacing: look for extra gaps or merged paragraphs, then fix them in Word.
The same advice applies to the separately documented download in Markdown to Rich Text. That tool also produces an HTML-based .doc, so open it in desktop Word and save a .docx copy the same way.
If the content must stay clean for later reuse, keep the original editor content or exported HTML as your source. For a related habit, see how to draft, save and export markup safely. The .docx is a presentation copy, not a lossless backup of the markup.
Frequently asked questions
Is content.doc a real .docx file?
No. It is HTML packaged so Word can open it, saved under a .doc name. A real .docx is an Office Open XML package, which is a ZIP archive of document parts. Save As in desktop Word is what creates that package.
Can I just rename content.doc to content.docx?
Renaming changes the label but not the contents. The file would still be markup, not a ZIP package, so Word may report it as corrupt or unreadable. Open the original in desktop Word and save a copy as .docx instead.
Why does Word ask me to confirm the format when I open the file?
The contents are HTML while the name says .doc, so Word may ask before opening. Continue only if the file came from your own export. If you did not create it, do not open it.
Will my formatting survive when I save as .docx?
Do not assume it will. Word interprets the HTML in its own way, so headings, lists, links and spacing can look different. Inspect the opened file, correct problems in Word, save the .docx, then reopen it to confirm.
Does the site export a native .docx?
The WYSIWYG HTML Editor lists HTML, Word (.doc) and TXT exports, and Markdown to Rich Text offers an HTML-based .doc and states it is not .docx. Neither is described as native .docx export, so finish the conversion in Word.
Will the export open in Word for the web?
It is not guaranteed. Microsoft says Word for the web can display .doc files and creates a .docx copy for editing, but also says HTML files are unsupported. Create the .docx in desktop Word first, or test a small upload before relying on it.
What should I do if a .doc file arrives from someone else?
Treat it cautiously. Confirm with the sender, check it with your usual security tools, and do not open it only because the name looks familiar. The workflow in this article is meant for files you exported yourself.
Next steps
The short rule behind an HTML based doc file not docx Word export is this: content.doc is HTML Word can open, and only Word’s Save As step produces a real .docx. Open it in desktop Word, review the formatting, save the .docx, reopen it, and upload that file wherever a native format is required. Your next step is to export one short test document, run the whole sequence once, and note what changes. If you move text between Markdown and Word often, the round-trip workflow for writers and developers shows how to keep a clean source.
Related tools and resources on HTML Editor Online:
Sources and further reading
- Markdown to Rich Text Converter – Copy to Word | HTML Editor Online
- Differences between using a document in the browser and in Word | Microsoft Support
- Save, back up, and recover a file in Microsoft Office | Microsoft Support
- About the Open XML SDK for Office | Microsoft Learn
- How to: Create a package | Microsoft Learn
