File Extension ZED File Format JLS ChromPerfect ZED file ZED stands for JLS ChromPerfect ZED 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 How can I open a zed file? My software is microsoft office and student 2010 C# & ZedGraph How can I access a .jls file or its bitstream compressed using JPEG-LS so that I may further compress it?