Guide · Word → HTML
Word to HTML, built in your tab and shown in a sandbox
This converter assembles the HTML on your own machine and shows it in a preview that can't reach the network. Two separate promises, and both can be checked.
When the document is a client deliverable or something not yet public, the useful question isn't whether they delete it — it's whether it was ever sent. Here it wasn't.
The markup is built before any request could fire
A .docx is a zip of XML. This tool unzips it and rebuilds the structure as HTML entirely in page scripts — code that arrived when you opened the page and works locally from then on.
No server stands behind it waiting for a file. The site is static assets, so there is no address a document could be sent to even if the code tried.
The preview is sandboxed on purpose
The generated HTML is rendered inside a restricted sandbox iframe. That frame can draw the markup but is blocked from running scripts, fetching remote fonts, or making requests — so markup that happened to contain something active still can't act.
The sandbox guards the preview; it isn't the same thing as the file's privacy. But it's why you can preview a document you didn't write without the preview itself becoming a door to the network.
Read the HTML before you trust it
Markup you can read is markup you can vouch for — a different kind of trust from a service that hands back a finished file you never open.
- 01Convert the file, then look at the source pane, not only the rendered view.
- 02Scan for anything you didn't expect — a script tag, a remote image, a beacon. There is none by default: it's your document as tags, with nothing bolted on.
- 03Copy the markup into a plain editor to confirm the same thing away from the page.
Now try it with the network off
Leave the Network tab open during a conversion and the point lands without unplugging anything: the document triggers no outbound request.
- 01Open the page, then disconnect from the internet.
- 02Hand it a .docx. The same HTML comes out; there was never a round trip to break.
The parts this doesn't cover
Keeping the file off the wire is the strong claim, not the only one that matters. Once the HTML leaves for a repo, a CMS, or a pasted email, its reach is whatever that place is.
And a browser is still a browser: an extension reading the page, or something already on the computer, sees the document either way. What's gone is the biggest exposure — a copy living on a converter's servers. The rest is unchanged.
Convert, read the source, and disconnect for a live demonstration if you like. The document is rebuilt as HTML in this tab and never sent on.
DOCX → HTML