.PPTMHTML File Extension
File TypeMicrosoft PowerPoint MIME HTML Presentation
What is a PPTMHTML file?
Archived Multipurpose Internet Mail Extensions (MIME) HTML presentation saved by earlier versions of Microsoft PowerPoint, a program used to create slide shows; contains HTML code that represents the presentation in the same format as the original .PPT file; used for viewing the published version of a presentation in a Web browser.
PPTMHTML files are no longer supported by Microsoft PowerPoint.