How to Open a DOCX Online. Microsoft introduced the DOCX format, which ends with the extension .docx, in 2007 as an upgrade to its popular word-processing program, Word. DOCX files ...

Avoid saving your DOCX files in the open-source ODT file format, however, because only the versions of Word that create and open DOCX files natively -- without the installation of converters and ...

Designed for use with Office 2000, XP, and 2003, the downloadable add-on allows you to open, edit, and save the newer file formats, seamlessly converting the files on the fly and in the background ...

Ankush khandelwal asked about compatibility issues between files created in different versions of Microsoft Office--specifically the big changes in file format that came with Office 2007.