CSAC file format description

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

1 filename extension(s) found in our database.

.csac - Web Research Collection Optimization Temporary Data

The CSAC data files are related to Web Research. The CSAC file is a Web Research Collection Optimization Temporary Data. Web Research is a Windows program that helps you save important information from the WWW. The Web Research seems to be no longer supported.

Web Research
Data files
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Web Research Collection Optimization Temporary Data related extensions:
MicroEMACS Abbreviation File
MSIX AppInstaller Setup Data
SAP Business Objects Web Intelligence Data
Scrapbook Factory Journal Data
Avid Pro Tools 5 Session Data
Nintendo 3DS BCMDL Model Data

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

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

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

cac, csa, csc, fsac, sac

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

dBase IV Executable
File Search Assistant Data
18 Wheels of Steel CSC Data
RSView Machine Edition Tag Cache
Single Assignment C Code
STK Calculation Scalar File

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 >> CSAC file