• Reference & Education, Legal
• YZ1 file program
• March 29, 2026

A YZ1 file is an old compressed archive format, which means it is not usually the actual document, photo, or program itself, but rather a container that holds one or more files inside in a compressed state to save space, similar in purpose to a ZIP file. It is identified as a Yamazaki Zipper archive and is associated with the …