All about FCT Files

The FCT file type is primarily associated with WinCC flexible.

FCT	File extension: FCT
	File type:	logic code file

What is an FCT file?

FCT files mostly belong to WinCC flexible. FCT files are mainly used to store Zenon Logic Function Code in industrial automation projects with WinCC flexible. They hold the logic and instructions that control automated processes.
If you examine an FCT file, you might find one of these types of content:

• Industrial automation logic: This is the most common use. The file contains automation function code used in Siemens systems. For more details, see the Siemens Support page.
• Greeting Card Projects: A smaller number of these files are created by Greeting Card Factory Deluxe to store greeting card designs.
• 3D Model Data: Some FCT files hold 3D models, such as Framsticks Creature Files used in simulations.

FilExt.com tip: Each file's content depends on which program created it. Use the associated software to open and view the file correctly.

How to open an FCT file

You need a suitable software like WinCC flexible to open an FCT file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your FCT file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a FCT file directly in the browser:. Just drag the file onto this browser window and drop it.

Online FCT Text Viewer

Choose your .fct file to analyze

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Online File Viewer

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FCT file format details:

If you know the file format, you can also find out how to open or edit the file. The initial characters of a file are called signature, sometimes also referred to as "magic bytes". The signature can be used to infer the file format. However, different programs can use the same file extension, and file extensions can be assigned incorrectly. When there is a problem with a file, the first step to solving it is to determine the file format. Below you will find our evaluation of the FCT files:

FCT is seldom used as a file extension and includes different formats for the applicable programs. The following file formats are most commonly found in FCT files:

• 55% of all FCT files start with the magic bytes #FUNC, which are always the first bytes of this file format. These are binary files, so they do not contain words or text. The files are often between 1 KB and 15 KB in size. The file type is old but is used even today. The files contain the following words: #FUNC, void and char. Files like these are sometimes connected to passlogin and demo.
• 10% of all FCT files are based on the Microsoft Compound File format, also known as Compound File Binary File format (CFBF or CFB) or OLE2 Compound Document format. This Windows file format has features similar to those of a filesystem format with virtual files and subfolders. The file signature of compound files is defined as D0 CF 11 E0 A1 B1 1A E1, so the first character of a file looks like "DOCFILE". FCT files contain an app name Greeting Card Factory 2. The file contains several sections which are named like DocInfo, Spreads and Tables. A typical file size is 200 KB.

All other FCT files (35%) have no consistent format. These files are often connected to last or save. If you want to find out what your FCT file contains, drag and drop it onto this page.