CFLT file format description

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

1 filename extension(s) found in our database.

.cflt - CATS Flat File

The CFLT data files are related to CATS. The CFLT file is a CATS Flat File. CATS is a software package which converts semiconductor design data into a useful format for making the circuit templates (also referred to as "photomasks") for semiconductor manufacturing.

Data files
- / -
CATS Flat File related extensions:
CATS Library File
CATS Location File

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

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

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

celt, cfl, cft, clt, flt

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

OpenFlight Model Data
Adobe Audition Filter
Adobe PageMaker Import Filter
General Filter Data
ChiWriter Low-res Screen Font
FAiRLiGHT Group Abbreviation

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 .cflt file format, then write to us! >> CFLT file