FCG file format description

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

2 filename extension(s) found in our database.

.fcg - GAUSS Engine Compiled Gauss Data

The FCG data files are related to GAUSS Engine. The FCG file is a GAUSS Engine Compiled Gauss Data. GAUSS is a matrix programming language for mathematics and statistics, developed and marketed by Aptech Systems.

GAUSS Engine
Data files
- / -
GAUSS Engine Compiled Gauss Data related extensions:
FEFLOW Problem Settings Data
PLINK Nearest Neighbor Distance Report Data
CrazyTalk Head Data
Autodesk Mapguide Symbol Library
Gaussian Input Data
QIP Infium ICQ Data

.fcgi - FastCGI Application

The FCGI application files are related to FastCGI. The FCGI file is a FastCGI Application. FastCGI is a binary protocol for interfacing interactive programs with a web server. FastCGI is a variation on the earlier Common Gateway Interface (CGI).

Application files
- / -
FastCGI Application related extensions:
FastCGI Application

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

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

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

bcg, ccg, cfg, cg, dcg, ecg, fc, fcb, fcf, fch, fcr, fct, fg, fgc, fsg

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

FaceGen Project
Gaussian Formatted Checkpoint File
GCG DNA Sequence
Greeting Card Factory Card
RollerCoaster Tycoon 3 Camera Data
FreeCol Saved Game

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 >> FCG file