Microsoft Office 2007 file extensions

6 May 2009

Since Microsoft Office 2007 there have been a lot of problems with Microsoft Office compatibility.

Up until Microsoft Office 2007, Word would always use the file extension .doc, Excel would always use the file extension .xls and PowerPoint would always use the file extension .ppt

With Microsoft Office 2007 also came new file extensions. Word now uses .docx, Excel now uses .xlsx and PowerPoint now uses .pptx

Because of the new file extensions they're no longer backwards compatible with Microsoft Office 2003 and other versions of Office.

As a result, if you want your Microsoft Office documents to still be backwards compatible you just need to change the file type when you're saving your document.

When you have your document click "Save As..."

Just above where you enter your file name is a drop down box. Clicking this will show the different file types you can save the file as.

One option should be "Office 97 - 2000" (or sometyhing similar) and should have the original file extensions .doc, .xls and .ppt

I haven't used Office 2007 to a great extent, but I'm guessing the other file types will work in the same way.

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