File Extension DOCX

  • Full name
    Microsoft Word 2007/2010 Open XML Document Format
  • Developer
  • Popularity
Have you encountered a problem with a DOCX file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a DOCX file here. In the further part of this page we have added a list of programs that should open your DOCX file. It is enough you choose a proper application for your operating system, download and install it.


The file extension DOCX is the latest version of the Microsoft Word doc file format. The DOCX format will be supported starting with the 2007 version of the worldwide word processing program. The file extension DOCX simply means Document Xml, ie a document in XML format.

A DOCX file contains, as well as the old doc files in addition to texts and formatting instructions also pictures and graphics. It can not contain macros. Files with macros automatically receive the extension docm.

DOCX is an XML based file format (Office Open XML) that is not legible with older versions of Word. For the Office versions 2000, 2003 and XP, however, this functionality can be retrofitted using the Microsoft Office Compatibility Pack, whereby the result of a read-in DOCX file does not always have to be 100% identical to the original.

Office Open XML is an open standard developed by Microsoft for office applications, which is intended to ensure the file exchange between different office suites.

A DOCX file consists of several XML files, which are automatically summarized as archives when saved using the ZIP algorithm. This saves space compared to the old format. Other benefits include better data integrity and easier data recovery in the event of data loss.

Programs which can open a DOCX file

How to open a DOCX file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the DOCX file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a DOCX file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support DOCX files. At this point we are looking for disk space where the application was installed in and we can link it with a DOCX file. Since then, our operating system will use the selected program to support all DOCX files.

Other issues

Despite the described problem with DOCX there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the DOCX file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the DOCX file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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