File extensions

MATLAB

.m 

MATLAB code (function, script, or class)

.mat 

MATLAB data (binary file for storing variables)

.mex* (.mexw32, .mexw64, .mexglx, .mexa64, .mexmaci64, ...) 

MATLAB executable MEX-files(platform specific, e.g. ".mexmac" for the, ".mexglx" for , etc.)

.p 

MATLAB content-obscured .m file (P-code)

.mlx 

MATLAB live script

.fig 

MATLAB figures (created with GUIDE)

.mlapp 

MATLAB apps (created with App Designer)

.mlappinstall 

MATLAB packaged App Installer

.mlpkginstall

support package installer (add-on for third-party hardware)

.mltx, .mltbx

packaged custom toolbox

.prj

project file used by various solutions (packaged app/toolbox projects, MATLAB Compiler/Coder projects, Simulink projects)

.rpt

report setup file created by MATLAB Report Generator

Simulink

.mdl 

Simulink Model

.mdlp 

Simulink Protected Model

.slx 

Simulink Model (SLX format)

.slxp 

Simulink Protected Model (SLX format)

Simscape

.ssc 

Simscape Model

MuPAD

.mn 

MuPAD 

.mu 

MuPAD Code

.xvc, .xvz 

MuPAD Graphics

Third-party

.jkt 

GPU Cache file generated by Jacket for MATLAB (AccelerEyes)

.mum 

MATLAB CAPE-OPEN Unit Operation Model File (AmsterCHEM)