CYS file format description

Many people often share .cys files without providing instructions on how to use them. This can make it difficult for users to determine which program is compatible for editing, converting, or printing .cys files. To address this issue, we have created this page to offer assistance and guidance on handling .cys files. We provide information on compatible software, editing instructions and conversion options to help users effectively interact with .cys files.

Our aim is to simplify the process and promote seamless use of the .cys file format.

2 filename extension(s) found in our database.

.cys - Clustify Summary File

The CYS data files are related to Clustify. The CYS file is a Clustify Summary File. Clustify is a document aggregator that automatically groups documents that are related into a cluster.

Data files
- / -
Clustify Summary File related extensions:
Clustify Input File
Clustify Output

.cys - Cytoscape Session File

The CYS data files are related to Cytoscape. The CYS file is a Cytoscape Session File. Cytoscape is an open source bioinformatics software platform for visualizing molecular interaction networks and biological pathways and integrating these networks with annotations, gene expression profiles and other state data.

Data files
- / -
Cytoscape Session File related extensions:
Cytoscape Nested Network Format File
Cytoscape Simple Interaction Format File

Naturally, other applications may also use the .cys file extension. Even harmful programs can create .cys files. Be especially cautious with .cys files coming from an unknown source!

Can't open a .cys file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .cys file extension is often given incorrectly!

Based on searches conducted on our site in the past year, we have compiled a list of the most common misspellings. These frequent misspellings can cause confusion and hinder search accuracy. By providing this list, we aim to assist users in finding the correct information more easily and improving their overall search experience on our site.

These misspellings were the most common in the past year:

cgs, chs, cjs, cs, csy, cts, cus, cy, cyc, dys, sys, xys, ys

Is it possible that the filename extension is misspelled?

There is a possibility that the .cys filename extension is misspelled. To assist users in identifying potential errors, we provide a list of similar file extensions in our database.

Filename extensions similar to .cys:

Torque 3D Game Engine Script
System File
Adobe Encore Color Set
Cycript Source Code
ChessRally Game Data
Autodesk AutoCAD Custom Dictionary

Operating systems

At, we strive to provide a seamless user experience by ensuring compatibility with a wide range of operating systems. The following is a comprehensive list of the operating systems currently supported by

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .cys file format, then write to us! >> CYS file