How to convert PPTX to PPT, Convert Powerpoint 2007 to PPT, Here are three methods to convert PPTx to PPT.

What's PPTX: PPTX is used by one of Microsoft's replacements for the PPT format. PowerPoint Presentations can be saved and run in any of the file formats: the default .ppt (presentation), .pps (PowerPoint Show) or .pot (template). In PowerPoint 2007 and Mac OS X 2008 versions, the XML-based file formats .pptx, .ppsx and .potx have been introduced, along with the macro-enabled file formats .pptm, .potm, .ppsm.

Now, we will tell you how to convert PPTx to PPT.

Method 1, It's the most time-saving method, just open the PPTX with Powerpoint 2007, then save as Powerpoint 97-2003 presentation. you will get the PPT with least missing.

Method 2: If you have installed Powerpoint 2003, and do not want to upgrade to Powerpoint 2007, you need to use the online tool!  I recoment the Google , Google Document or GMail.

if you want to read a PPTX file recived, just the content, not the animations, but no Office installed, the quickly method is use online tool:

Google Documents.

You need a Gmail, then have a Google Account, turn to to Google Documents Page, choose the Upload button, then you can see:

Choose the PPT /XLSX / DOCX (Not PPTX) files you can't read, Start upload , then you can read them on Google Documents. becase PPTX have lots of animations that Google Document can't support, so you can't upload PPTX files. but you can use Gmail, view it as HTML or save as Google Documents.

Now, Sign in Gmail, sent a Email PPTX files attached to yourself. Open the email, you can see the files attached, no matter PPTX/Docx/XLSX or PDF, all can view as HTML.

Here is a limitation that, Gmail and Google Document can't show images attached in PPT files. just view the content, and the effection is missing. use the content to build a new PPT file, then finish the PPTX to PPT task.

So, if you want to open an can't readable PPTX file, the best methods is installing Powerpoint 2007.

Method 3: Use Powerpoint 2007. the PPTX file is build on Powerpoint 2007, if convert to PPT, here must have some animations losing, but somebody who the PPT file will sent to , mybe just installed Powerpoint 2003, the easiest way is convert the PPTX to PPT.

 Like method one, click Open-->Save As-->Powerpoint 97-2003 Presentation then get the PPT File. but how do we upgrade the Powerpoint 2003 to Powerpoint 2007. You need download a file FileFormatConverters.exe (27.5M) from Microsoft here http://www.microsoft.com/downloads/details.aspx?FamilyId=941b3470-3ae9-4aee-8f43-c6bb74cd1466&displaylang=en . Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats (Brief Description: Open, edit, and save documents, workbooks, and presentations in the file formats new to Microsoft Office Word, Excel, and PowerPoint 2007.)

How can convert PPTx to PPT with no quality losing. there is no methods, becase the PPTX is the New version of Powerpoint Presentation, it support more animations than PPT . Why do we need to convert PPTX to PPT, just face more users who want to view and edit our powerpoint presentation but just have Powerpoint 2003 on PC.  if you want others can't edit the PPT files, you can convert the PPTX to Video, Convert PPTX to DVD , Convert PPT to SWF or Convert PPTX to Exe .