You can simply resave PPT presentation to PPTX format in Microsoft PowerPoint 2010 and later.
Home > Search converters: ppt to pptx
Conversion of ppt file format to pptx file format beta
Search for ppt to pptx converter or software able to handle these file types.
Convert Microsoft PowerPoint 97 to 2003 presentation to Microsoft PowerPoint Open XML presentation.
We have found 11 software records in our database eligible for .ppt to .pptx file format conversion.
Microsoft Windows software 
- convert ppt to pptx on Windows
Microsoft PowerPoint
A presentation program from the Microsoft Office suite
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from ppt file | Yes, Microsoft PowerPoint supports ppt file conversion as a source file type. | Yes | Yes | ppt editor | Yes | No | No | No |
to pptx file | Yes, Microsoft PowerPoint supports pptx file conversion as a target file type. | Yes | Yes | pptx editor | Yes | No | No | No |
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned ppt to pptx. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Corel Presentations
A presentation graphics application from Corel WordPerfect Office
All File to All File Converter 3000
An universal picture and document converter
SoftMaker Presentations
A innovative presentation program from Softmaker Office suite
Word Excel to Htm Html Converter
One of the many available document converters
Apple macOS / Mac OS X software 
- convert ppt to pptx on OS X
Microsoft PowerPoint for Mac
Mac version of popular presentation software from Microsoft
Keynote for Mac
The most popular presentation software for Mac
Windows Mobile/CE software - convert ppt to pptx on Windows Mobile
SoftMaker Office for Windows Mobile
A fully working office suite for Windows Phone smart phones
Blackberry mobile phones and devices software 
- convert ppt to pptx on Blackberry
eOffice
Office suite app for BlackBerry devices
Multiplatform software 
- convert ppt to pptx on any platform
Apache OpenOffice Impress (OpenOffice.org Impress)
Free presentation program from OpenOffice.org
LibreOffice Impress
Powerful multimedia presentation software tool from LibreOffice suite
Additional links: Open ppt file, Open pptx file
PPT
A ppt file extension is traditionally used for Microsoft PowerPoint presentations. PowerPoint presentation can contain text, pictures, audio or video data. Sometimes also called slide shows.
PPTX
Files with pptx extension are presentations from modern version of PowerPoint from Microsoft Office / Office 365. PowerPoint slide shows are basically set of screens which can include text, graphic, sounds or videos used for various presentation purposes.
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