QuarkXPress is a desktop publishing application.
Many file extensions have been reported: .qcd, .qct, .qpt, .qwd, .qwt, .qxb, .qxd, .qxl, .qxp, .qxt. More research may be needed to sort this out.
Files have "
IIXPR" or "
MMXPR" at offset 2.
QuarkXPress legacy documents (QuarkXPress 3, 4, 5 and 6) need to be converted to the new format (QuarkXPress 9.1) in order to be opened by QuarkXPress 10 and newer. Free software is available.