This article explains what a POTX file is and how to open or convert it on your computer.
A file with the POTX file extension is a Microsoft PowerPoint presentation template file used to maintain the same layout, text, styles, and formatting across multiple PPTX files.
Like other Microsoft Open XML files (e.g. PPTM, DOCX, XLSX), the POTX format uses a combination of XML and ZIP to structure and compress the data.
Before Microsoft Office 2007, PowerPoint used POT files to create similar PPT files.