CDAT file format description

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

1 filename extension(s) found in our database.

.cdat - Microsoft ISA Server Cache

The CDAT data files are related to Microsoft ISA Server. The CDAT file is a Microsoft ISA Server Cache. Microsoft Internet Security and Acceleration Server (ISA Server), is a discontinued network router, firewall, antivirus program, VPN server and web cache from Microsoft Corporation.

Microsoft ISA Server
Data files
- / -
Microsoft ISA Server Cache related extensions:
Windows Media Recorder Data
CRYSTALS Reflections Data
SAP Business Objects Shared Security Information File
EMML Document
Fabasoft app.ducx Expressions Data
plasTeX Data

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

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

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

cat, cda, cdt, dat, ddat, fdat, sdat, vdat, xdat

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Stanford Microarray Database Clustered Data
SkyGazer Data
XMVB Data File
Nero BackItUp Drive Image
CorelDraw Template
Nitro Composer Sound Data

Operating systems 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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If you have useful information about the .cdat file format, then write to us! >> CDAT file