The only minimum requirement is that the PowerPoint files be in .pptx file format (not just .ppt), or access to a version of PowerPoint from Office 2007 or later, which can write .pptx files.
This example is on a Mac, but the same principle works on Windows, all that is required for Windows is an un-ZIP utility.
The solution is SIMPLE. SIMPLE.
- If the PowerPoint file has a .ppt extension, open it in PowerPoint 2007+ and save it again as .pptx.
- PPTX files save presentation data as widely-supported XML data structures, compressed in a package using the venerable ZIP archive format.
- On a Mac, rename the .pptx extension to .zip. The Finder will ask if you’re sure. Click “Use .zip.”
- Double-click the resulting .zip file. The Finder will uncompress the file into a directory structure. Inside[folder with orig filename]:ppt:media are all the image files in their native formats.