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.COM File Extension

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File TypeDOS Command File

DeveloperMicrosoft
Popularity
4.0 (52 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryExecutable Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

What is a COM file?

A COM file is an executable program capable of being run by MS-DOS and Windows. It is saved in a binary format and is similar to an .EXE file, but differs in that it has a maximum size of roughly 64KB and it has no header or metadata. The file is commonly used for executing a set of instructions whereas EXE files are used for fully developed programs.

More Information

Both DOS and Windows have used the ".com" extension for many years, and the ".com" extension shouldn't be confused with the ".com" Internet domain name.

NOTE: If a folder includes both EXE and COM files with the same filename (e.g., run.exe and run.com), the DOS or Windows command prompt will run the COM file if you type the filename without the extension.

Common COM Filenames

COMMAND.COM - The Windows shell program used by DOS and Windows 95, 98, and Me. It was replaced by cmd.exe in later versions of Windows.

Programs that open COM files
Windows
Microsoft Windows
Mac
Parallels Desktop for Mac with Windows installed
Updated 4/21/2016