High Quality Content by WIKIPEDIA articles! Zipeg is an open source free software that extracts files from ZIP, RAR and other archives. Zipeg works under Mac OS X and Windows. It is best known for its file preview ability. It is incapable of compressing files, although it is able to extract compressed ones; it supports RAR, ZIP and other formats. Zipeg is built on top of the 7-Zip backend. Its UI is implemented in Java and is open source.