This is the new format used for Powerpoint presentations. I believe this format came in with MS Office 2007. It claims to have more options that .ppt, which is the old MS PowerPoint format.
.pptx
.pptx
This is quite simple .ppt is Microsoft 2003 or earlier word file while .pptx is 2007 and up.
.ppt is Microsoft 2003 or earlier word file while .pptx is 2007 and up.
The default file name is Presentation 1 The default file extension is .pptx
I believe the default is .pptx (The old default used to be .ppt)
You may open powerpoint documents due to tool below. It must assist you to solve out any problems with opening powerpoint files.
IT MEans the file can only be viewed on Power point.
.ppt for versions up to 2003 and .pptx from version 2007 onwards.
.pptx is for Pwerpoint 2007 and onwards, including Powerpoint 2013.
This is because the are supported only by libreoffice draw.
The major difference is file format. MS office 2007 uses xml file format ie docx, xlsx, pptx, etc.