The Z-OptimiZr MS Office 2003 (DOC, PPT, XLS files) to XML (DOCX, PPTX, XLSX files) conversion and optimization feature enables to update your old MS Office 2003 files to the current MS Office 2007-2016 XML format while significantly reducing their size. The average volume reduction ratios obtained on these files are most often around 50%.

 
The converted + optimized resulting MS Office XML files files are fully standard Microsoft Office DOCX, PPTX and XLSX files.
These files can thus be opened directly in Microsoft Office as well as in any application able to open Microsoft Office XML files.

 
The MS Office 2003 to MS Office XML conversion feature requires Microsoft Office to be installed on the computer.