The X
extension name file type Classification
M Objective-C Implementation File developer files
M MATLAB Source Code File developer files
M Mercury Source Code File developer files
M4 Macro Processor Library developer files
MAGIK Magik Source Code File developer files
MAK Makefile developer files
MAKE Xcode Makefile Script developer files
MAKE Makefile developer files
MAKO Mako Template developer files
MARKDN Markdown File developer files
MARKDOWN Markdown Documentation File developer files
MCP CodeWarrior Project developer files
MD Markdown Documentation File developer files
MD Machine Description File developer files
MDOWN Markdown File developer files
MDZIP MagicDraw Project Archive developer files
MED RSView Development Project developer files
MER RSView Development Runtime File developer files
MESHLIB Godot Engine Mesh Library File developer files
MF Java Manifest File developer files
MFA Multimedia Fusion Development File developer files
MFCRIBBON-MS MFC Ribbon Definition XML File developer files
MK Makefile developer files
MKD Markdown Documentation File developer files
ML ML Source Code File developer files
MLB Visual FoxPro Library developer files
MM Objective-C++ Source File developer files
MO Machine Object File developer files
MOD Fortran Module File developer files
MODE1V3 Xcode Project Data File developer files
MODE2V3 Xcode Project Data File developer files
MOM Managed Object Model developer files
MPR FoxPro Generated Menu Program developer files
MPWS MathPiper Worksheet developer files
MPX FoxPro Compiled Program Menu developer files
MQ4 MQL4 Source Code File developer files
MQ5 MQL5 Source Code File developer files
MQH MetaTrader Include File developer files
MRSN Mersenne Source Code File developer files
MRT Stimulsoft Report File developer files
MSHA Microsoft Help Asset File developer files
MSHC Microsoft Help Container File developer files
MSHI Microsoft Help Index File developer files
MSIX MSIX Installer Package developer files
MSL Mapping Specification Language File developer files
MSP MaxScript Page File developer files
MSS Microprocessor Software Specification File developer files
MV MivaScript File developer files
MVX Multimedia Fusion Movement Extension developer files
MXML Flex MXML Component developer files