.SY_ File Extension

Compressed SYS File

Developer Microsoft
Popularity
4.1  |  7 Votes
Category Compressed Files
Format Binary

What is an SY_ file?

Compressed .SYS file sometimes used by application installers to reduce the size of installation files; similar to a .EX_ or .DL_ file and can be expanded back to a SYS file using the Microsoft Expand command line utility with the following syntax:

More Information

expand file.sy_ file.sys

NOTE: SY_ files also may just be renamed SYS files and therefore may not be compressed.

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Programs that open SY_ files

Windows
Included with OS
Updated December 28, 2011

Verified by FileInfo.com

The FileInfo.com team has independently researched the Compressed SYS file format and Windows apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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