How to open Apple Keynote presentation XML document settings .apxl files
Have you had trouble opening the apxl file on your computer? What are apxl files? We explain what they are and recommend software that we know will open them.
What is apxl file?
Files with apxl file extension can be usually found as settings files from Apple Keynote. Used to define users settings in the program.
Apple Keynote presentation XML document settings description
The apxl file extension is mainly used by Apple Keynote application for one of the default file type.
An apxl file is located inside the .key Keynote presentation file, which is basically a ZIP archive that contains all presentation data such as text, images, sounds, videos settings etc.
APXL is a simple text - XML structured file format, which specifies every detail of the presentation’s appearance and behavior—from the appearance of the master slide and each individual slide to the transitions used between slides and the state of the presentation when the customer first opens it.
To view the contents of a KEY Keynote file in the Mac OS X (macOS), right click it, select Show Package Contents from the contextual menu that appears, then open the Contents folder.
To view the contents of a KEY Keynote file in the Microsoft Windows, rename the KEY file extension to ZIP file extension and open archive in the compression utility, which supports ZIP compression.
Suggested software to open apxl file

Keynote for Mac
The most popular presentation software for Mac

iWork
Office productivity suite from Apple