File Extension XPL File Format Xset plugins file XPL stands for Xset plugins file. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Backing up a Joomla website without plugin Get Elasticsearch results as CSV file How to integrate Java db with eclipse?