Keynote accepts formats from Microsoft PowerPoint (.ppt, .pptx, .pps, .ppsx) and can open and further work on them. It may even save them to its own .key format. The previously used .keynote files cannot be produced in latest version of Keynote. You would have to use some of the earlier version of the app.
Convert Microsoft PowerPoint Open XML presentation to iWork Keynote '06 presentation.
We found one software available in the database for this conversion.
Apple macOS / Mac OS X software - convert pptx to keynote on OS X
The most popular presentation software for Mac
Convert from pptx file format
|Yes, Keynote for Mac supports pptx file conversion as a source file type.||Yes||Yes||pptx editor||Yes||No||No||No|
|Yes, Keynote for Mac supports keynote file conversion as a target file type.||Yes||Yes||keynote editor||Yes||No||No||No|
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.