ZIP, ZIP Archive File (.zip)


The .zip file format

The .ZIP file format is a compression software first developed by Phil Katz of PKWARE to compete with SEA's ARC archiving system ("Zip" means high speed). The first known version of .ZIP File Format was first published in 1989. ZIP format supports lossless data compression using different methods and even supports archiving of files or directories without compression.


.zip technical details

In Zip filing format each file or directory is compressed individually so that each file is handled uniquely to optimize the compression process. However, this also creates restrictions on the compression potential. The DEFLATE algorithm is the most commonly used compression procedure amongst several that are available. ZIP also backs a simple password-based system of encryption, although it is generally acknowledged as seriously flawed.


Additional information about ZIP file format

File extension .ZIP
File category ARCHIVE
Useful links
File conversion Convert a file to ZIP
Developer PKWARE
Associated programs Zipper, RAR, File extractor, Winzip