DevConverter is an online document and presentation converter. Amongst many others, we support PDF, PPTX, PPT, ODP. Thanks to our advanced conversion technology the quality of the output will be exactly the same as if the file was saved through the latest Microsoft Office 2019 suite.
The 'M' of PPTM stands for macro. Macros are programs embedded in Office documents used to automate different tasks. Staring from PowerPoint 2007, PPTX presentations that contain macros are saved with the PPTM extension.