Free Online DOCX Document Merger

Merge DOCX documents online from any device, with a modern browser like Chrome, Firefox

DOCX Microsoft Word Open XML Document

Docx is well-known format for Microsoft Word documents. Introduced from 2007 with the release of Microsoft Office 2007, the structure of this new Document format was changed from plain binary to a combination of XML and binary files. Docx files can be opened with Word 2007 and lateral versions but not with the earlier versions of MS Word which support DOC file extensions.

Discover GroupDocs.Merger free online app!

Free Document Conversion, Viewer, Merger app for Windows

Free Document Conversion, Viewer, Merger app for Windows

  • Easily convert, view or merge unlimited files on your own Windows PC.
  • Process Word, Excel, PowerPoint, PDF and more than 100 file formats.
  • No limit of file size.
  • Batch conversion of multiple files.
  • One app with rich features like Conversion, Viewer, Merger, Parser, Comparison, Signature.
  • Regular FREE updates with new features coming every month.
Free Download

How to merge DOCX files online

  • Select or drop your DOCX documents to upload for merge.
  • Once upload completes, drag DOCX document thumbnails to rearrange them (if needed).
  • Click on Merge Now button to start merge process.
  • Once your DOCX documents are merged click on Download Now button.
How to

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 GroupDocs.Merger for .NET API

Rich document merger .NET library & API.
Boost your solution's features with our powerful document merge engine!

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Java version of GroupDocs.Merger library and API.
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Easy to use cross-platform Cloud solution.
The secret of document merging for Cloud solutions!

Open-Source UI/UX Solutions

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Integrate document merger in your apps using our out-of-the-box open-source front-end solutions based on Angular and GroupDocs.Merger for .NET/Java.
UI/UX solutions can be run as standalone application or can be integrated in any .NET/Java application, download and build your merger solution within few clicks!
  • GroupDocs.Merger MVC UI/UX Solution (Coming Soon)
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 GroupDocs.Total for .NET and Java

GroupDocs.Total is an open-source UI/UX solution where all GroupDocs products are working together as one.
GroupDocs.Total provides multiple high quality features against over 120 document formats, such as conversion, signature, parser and much more!

Other Merger file formats

You can also merge other file formats. Please see the list below.

CSV Merger (Comma Separated Values File)
DOC Merger (Microsoft Word Document)
DOCM Merger (Word Open XML Macro-Enabled Document)
DOT Merger (Word Document Template)
DOTM Merger (Word Open XML Macro-Enabled Document Template)
DOTX Merger (Word Open XML Document Template)
EPUB Merger (Open eBook File)
HTML Merger (Hypertext Markup Language File)
MHT Merger (MHTML Web Archive)
MHTML Merger (MIME HTML File)
ODP Merger (OpenDocument Presentation)
ODS Merger (OpenDocument Spreadsheet)
ODT Merger (OpenDocument Text Document)
ONE Merger (OneNote Document)
OTP Merger (OpenDocument Presentation Template)
OTT Merger (OpenDocument Document Template)
PDF Merger (Portable Document Format File)
PPS Merger (PowerPoint Slide Show)
PPSX Merger (PowerPoint Open XML Slide Show)
PPT Merger (PowerPoint Presentation)
PPTX Merger (PowerPoint Open XML Presentation)
RTF Merger (Rich Text Format File)
TEX Merger (LaTeX Source Document)
TSV Merger (Tab Separated Values File)
TXT Merger (Plain Text File)
VDX Merger (Visio Drawing XML File)
VSDM Merger (Visio Macro-Enabled Drawing)
VSDX Merger (Visio Drawing)
VSSM Merger (Visio Macro-Enabled Stencil File)
VSSX Merger (Visio Stencil File)
VSTM Merger (Visio Macro-Enabled Drawing Template)
VSTX Merger (Visio Drawing Template)
VSX Merger (Visio Stencil XML File)
VTX Merger (Visio Template XML File)
XLAM Merger (Microsoft Excel Add-in)
XLS Merger (Excel Spreadsheet)
XLSB Merger (Excel Binary Spreadsheet)
XLSM Merger (Excel Open XML Macro-Enabled Spreadsheet)
XLSX Merger (Microsoft Excel Open XML Spreadsheet)
XLT Merger (Microsoft Excel Template)
XLTM Merger (Microsoft Excel Macro-Enabled Template)
XLTX Merger (Excel Open XML Spreadsheet Template)
XPS Merger (XML Paper Specification File)