What is a MAT file?
A .MAT file is most commonly a MATLAB MAT-file created by The MathWorks. These files store workspace data, variables, functions, and arrays used in MATLAB. However, the .MAT extension is also widely used in 3D modeling and game engines to store material definitions. Software like Unity, Autodesk 3ds Max, Unreal Engine, and V-Ray use .MAT files to define how surfaces look, including textures, reflections, and colors. Because a .MAT file can serve very different purposes, it is important to identify the format before you open it.
How to open MAT files?
If you know the file origin, you can open it in its native application. For scientific data, you use MATLAB or open-source alternatives like GNU Octave and SciPy in Python. For 3D materials, you must import the file into the specific 3D engine or editor that created it. If you are unsure what kind of .MAT file you have, viewer.online/mat analyzes .MAT files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
File conversion and alternatives
Converting a .MAT file depends on its actual format. You can export MATLAB data to .CSV, .JSON, or .TXT for spreadsheet and database use. For quick format changes, we recommend using convert.guru to securely process your files into sensible target formats.
Summary
In summary, viewer.online/mat directly opens and previews .MAT files in the browser, eliminating the need to install software or troubleshoot compatibility issues.