YAC compressed archive
File type: Archive and compressed file
An yz file extension identifies an archive compressed with YAC (Yet Another Compressor). An yz file contains one or more files stored in a compressed archive.
File type category:
Archive and compressed file
Date updated: October 25, 2026
Record marked as obsolete and not updated for a long time.
YAC (Yet Another Compressor) is a file compression program developed for DOS. It uses an improved version of the LZ+Huffman compression algorithm to reduce the size of archived files.
The yz file extension belongs to YAC compressed archives. The format is obsolete and is no longer commonly used.
Use the original YAC program to open and extract an yz file. Because YAC was developed for DOS, it may require a DOS environment or emulator on a modern computer.
An yz file can be extracted with YAC, after which the extracted files can be added to a different archive format using a current archiving program. Direct conversion of the archive itself may not be supported.
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