CQS file format description

Many people share .cqs files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .cqs file can be edited, converted or printed with. On this page, we try to provide assistance for handling .cqs files.

1 filename extension(s) found in our database.

.cqs - ConQuest Saved Search File

The CQS data files are related to ConQuest. The CQS file is a ConQuest Saved Search File. ConQuest is the primary program for searching and retrieving information from the Cambridge Structural Database (CSD).

Data files
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ConQuest Saved Search File related extensions:
ConQuest Exported Spreadsheet

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

Can't open a .cqs 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 .cqs file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

cq, cqe, cqq, cqx, cqz, cs, csq, qcs, qs, sqs, vqs

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

QL-R-kemi Styled Source
QSplat Model
Microsoft Visual FoxPro Client-Server Query File
CLEO Custom Script
Cool Quiz Data
Tribes 2 Game Script

Operating systems

DataTypes.net currently supports the following operating systems:

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

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DataTypes.net >> CQS file