1Upload every file you want combined — at least two of them.
2Add the files in the order you want them joined; the first file you add comes first.
3Start the merge; the files are joined one after another into a single file.
4Download the single combined Word file.
Merge Word FAQ
Is the merge lossless?
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It is whenever the inputs already agree — the encoded data is copied straight through. It stops being lossless only when the inputs disagree and something has to be re-encoded to make them compatible, and even then it is one pass, not one per file.
How does Merge Word join the files together?
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Concretely, the documents are appended with their styles reconciled, so headings stay headings and the combined file is still fully editable rather than a stack of page images. Upload everything you want combined and the result comes back as a single file.
Anything specific to Word when merging?
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Yes — the document is a zip of XML, so text edits are cheap and the weight is almost always the embedded images. That is worth checking when the inputs did not all come from the same source.
Is there a file size limit on Merge Word?
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Yes: free accounts process documents up to 5 MB each, and since the text in a Word file is XML, anything near that ceiling is embedded images rather than writing. If a document is over it, the fix is almost always to downsize the images inside rather than to cut content.
Can I run Merge Word on several Word documents at once?
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Yes. Documents are small and parse fast, so a batch of them is usually finished before a single video would have started.
Why does a EPUB site host Merge Word?
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EPUB.to is built around the open eBook format — XHTML in a zip, reflowable by design, and readable on hardware nobody has thought about the layout for. A book is a zip full of markup, images and fonts, so almost every job people bring to an eBook site is really a job on one of those things. Merge Word runs on the same upload and the same account as the conversions because that is where it is needed.
What should I do with the result once Merge Word is finished?
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The converter on this site moves books between EPUB, MOBI, AZW3, PDF and DOCX, so a title ends up on whatever hardware is actually going to read it. Doing that after Merge Word means the conversion is made from the version you settled on, not from the one you were still fixing.
Is Merge Word here the same tool the sibling sites run?
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The engines are shared — the same toolchain, the same workers, the same limits. What a EPUB site adds is a view on reflow: which of these operations a reflowable book genuinely supports, and which ones only make sense on the fixed-layout media inside it. It also starts from one fact about the format this site is named after: the book is a zip of XHTML with a manifest, so the text costs almost nothing and every decision that matters is about the embedded images and font subsets.
Do I need an account, and does anything get kept?
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No account is needed. Uploads and results are kept for about 24 hours, which leaves time to download the result, and are then deleted automatically; nobody reads, lists or indexes them. Several files in one job need a paid plan.
