Extended Zip Archive
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What is a ZIPX file?
The ZIPX format was introduced with WinZip 12.1 in May 2009 and includes metadata that indicates the file was created using an advanced compression method. This lets users know that the file must be decompressed with WinZip 12.1 or another compatible file compression utility, such as PeaZip or The Unarchiver.
You may encounter ZIPX files in a variety of ways, such as when receiving compressed files via email or downloading compressed files from a website. You may also find ZIPX files when exploring backup files that have been compressed with ZIPX compression.
How do I create a ZIPX file?
You can create ZIPX archives with WinZip by selecting .zipx in the "Create/Share" ribbon, adding the file(s) you want to compress, then clicking the floppy disk "Save" icon or selecting File → Save.
How to open a ZIPX file
You can open a ZIPX file with various file compression utilities, which include Corel WinZip (Windows), PeaZip (Windows), Corel WinZip Mac (macOS), The Unarchiver (macOS), and B1 Free Archivera (multiplatform).
NOTE: ZIPX files cannot be opened with versions of WinZip earlier than 12.1.