Opening a COF File

The COF file type is primarily associated with MPLAB X.

COF	File extension: COF
	File type:	object

What is a COF file?

COF files mostly belong to MPLAB X by Microchip. A COF file is an executable object created by MPLAB X integrated development environment and saved in Common Object File Format (COFF). This file contains machine code and symbolic debugging information generated by the ALN Linker component and run on an embedded device. COF is also the filename extension of a conversion setup (device information, file names, device properties etc.) file used by Quartus II FGPA and CPLD development environment. Another type of CA file is a container order used by CA Client Automation tool. AutoCAD computer-aided design software uses a COF file to store various CAD data.

How to open a COF file

You need a suitable software like MPLAB X to open a COF 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 COF file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a COF file directly in the browser:. Just drag the file onto this browser window and drop it.

Online COF Text Viewer

Choose your .cof file to analyze

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Programs that open and convert COF files:

MPLAB X by Microchip
See the previous paragraphs to learn more about the main application. COF files are often referred to as MPLAB X executables because this type of file is primarily created or used by this software.
CA Client Automation (container order) by Broadcom
CA Client Automation is a client system management solution for enterprise users. It uses a COF file to store its container order. This file format is classified as Settings.
Days Of Death (data archive) by ColemanSystems
Days Of Death is a discontinued computer game. It uses program/media information saved in a COF file. This file format is classified as Game.
Quartus II (conversion setup) by Intel
Quartus II is a CPLD and FGPA design and development environment. Its conversion setup is saved in a COF file. This file format is classified as Settings.

COF file extension format:

Each file has a definite file format, that is, how the stored data is arranged in 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. Furthermore, a file extension can be renamed incorrectly and double-clicking on it will then display an error when it is opened. Knowledge is power - this also applies when dealing with unknown or faulty files. Our analysis of the COF files produces the following result:

An COF file is used by different programs with different formats. But the following two file formats are common:

45% of all COF files use the popular JFIF file format. JFIF is short for JPEG File Interchange Format. It is a bitmap graphic that uses JPEG compression. The content consists of illegible binary data, which can only be read and interpreted by the associated programs. COF files can be up to 91 KB in size, but are often around 3 KB - 64 KB. The file type was developed only in the last few years. Several words can almost always be found in the files, e.g. JFIF, , #&')*) and -0-(0%()(. Files like these are sometimes connected to glamour, look, capture, fairy, session and dscf.
10% of all COF files use the same file format, which can be identified by the letters "40 12" at the beginning. The contents of these files cannot be read by a human; only a computer program can interpret the data. COF files can be up to 220 KB in size, but are often around 1 KB - 140 KB. Several words can almost always be found in the files, e.g. .org_0 and .org_1. Examples of file names are Debug.cof. Files like these have the following tags: production.

All other COF files (45%) have no consistent format, often, for example, Maxon Cinema 4D Coffee shader, Quartus Conversion setup File and MP4. These files are often connected to download, common, code, sincro, saveinfo or igrf. Just click the "Choose your .cof file to analyze" button on this page to find out what your COF file is.

Technical Data for COF File Extension

File classification:

Executable

Related files:

cop, cos, cot, mpq, dcc, jpg, rpa, mcp, aso, kwo

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: CrystalPlayer.COF
EXEFile: %ProgramFiles%\Crystal Player\Crystal.exe %1

ProgramID: CrystalPlayer.COF
EXEFile: %ProgramFiles%\Crystal Player\CrystalFree.exe

a cof object is a special file format by Microchip and should only be edited and saved with the appropriate software.

How to solve problems with COF files

Associate the COF file extension with the correct application.
Update your software that should actually open objects. Because only the current version supports the latest COF file format. Search, therefore, e.g. on the Microchip manufacturer website after an available MPLAB X update.
To make sure that your COF file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .COF file online - secure, fast, and no downloads needed.