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Office Open XML I: Exploring the Office Open XML Formats

Save As dialog box showing file extension in file name box is .zip, but file type is still .docx

Notice that when you change the file extension for an Office Open XML Format file to .zip, the file type doesn't change.

To change the file extension to .zip, do the following:

  1. With the file open in its source program (such as Word 2007), click the Microsoft Office Button and then click Save As.
  2. In the Save As dialog box, in the File name box, type the entire file name inside quotation marks. Include the .zip file extension, as you see here. Then click Save. This action creates a copy of the file with the .zip extension.

As an alternative to the preceding method, you can edit the file name in Windows Explorer (select the file and then press F2 to edit the file name) and simply append the .zip extension to the end of the file name. If you use this method, for best practices, first create a copy of the file for backup purposes. Note that you must be viewing file extensions for this method to work.

Important     If you don't see file extensions when you view files in the Open or Save As dialog box or in Windows Explorer, change this setting before continuing. To do this, click the Start button and then click Computer (in Windows Vista) or My Computer (in Windows XP) to open Windows Explorer. (You can also open Windows Explorer by pressing Windows logo+E.) Then do the following:

  • In Windows Vista, click the Organize button and then click Folder and Search Options.
  • In Windows XP, on the Tools menu, click Folder Options.

In the Folder Options dialog box, on the View tab, clear the check box from the setting Hide extensions for known file types.

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