Convert DOC to DOCX - online and free

doc docx

How to convert a DOC to a DOCX file?

  1. Choose the DOC file that you want to convert.
  2. Select DOCX as the the format you want to convert your DOC file to.
  3. Click "Convert" to convert your DOC file.

Zamzar Pro Tip: You can use Microsoft Office, Libre Office or if you own a Mac you can use Pages to open DOC files.

Step 2 - Convert your files to

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Step 3 - Start converting

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DOC DOC (Document)

File extension .doc
Category Document File
Description Doc (an abbreviation of document) is a file extension for word processing documents; it is associated mainly with Microsoft and their Microsoft Word application. Historically, it was used for documentation in plain-text format, particularly of programs or computer hardware, on a wide range of operating systems. Almost everyone would have used the doc file format, whenever you write a letter, do some work or generally write on your PC you will use the doc file format. It was in the 1990s that Microsoft chose the doc extension for their proprietary Microsoft Word processing formats. As PC technology has grown the original uses for the extension have become less important and have largely disappeared from the PC world.
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Technical Details Early versions of the doc file format contained mostly formatted text, however development of the format has allowed doc files to contain a wide variety of embedded objects such as charts and tables from other applications as well as media such as videos, images, sounds and diagrams. doc files can also contain mail merge information, which allows a word-processed template to be used in conjunction with a spreadsheet or database.
Associated programs
  • Microsoft Word
  • Apple Pages
  • AppleWorks
  • StarOffice
  • AbiWord
  • KWord
Developed by Microsoft
MIME type
  • application/msword
Useful links

DOCX DOCX (Document)

File extension .docx
Category Document File
Description DOCX was introduced with Microsoft Word 2007, it's based on open XML and uses ZIP compression for smaller file sizes. The benefit of having open XML is that it is able to be read by applications, platforms and Internet Platforms. However to open it using any Microsoft Word that predated 2007 would require DOCX to be converted into a normal doc format.
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Technical Details DOCX improves file and data management and data recovery. DOCX extends what is possible with the binary files of earlier versions. Any application that supports XML can access and work with data in the new file format. The application does not need to be a Microsoft product it can be any application. Users can also use standard transformations to extract or repurpose the data. In addition, security concerns are drastically reduced because the information is stored in XML, which is essentially plain text. Thus, the data can pass through corporate firewalls without hindrance.
Associated programs
  • Microsoft Word 2007
  • Microsoft Word 2008 (MAC)
  • Word 2010
  • OxygenOffice Professional (Linux)
Developed by Microsoft
MIME type
  • application/vnd.openxmlformats-officedocument.wordprocessingml.document
Useful links

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