Convert PPTA to PPTX

ppta to pptx conversion seems to be searched by users that are looking for a way to export old packages from Articulate Presenter (.ppta) to PowerPoint. The package itself does not contain the presentation, so it is unlikely direct conversion is possible. Nonetheless, the latest version of Articulate 360 seem to interact with PowerPoint well, but it is unlikely any other software can work with .ppta files. If you have any issues with Articulate files, it would be best to contact their support or community websites.

Simply put, it is impossible to convert PPTA to PPTX directly.
Thus, there is no so-called ppta to pptx converter or a free online .ppta to .pptx converter to be found.