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What is .mat?

Name: MATLAB Data File (MAT-file)
Extension: .mat
Format: Binary
Category: Data
Developer: The MathWorks
Description: A MAT-file holds the variables saved from a MATLAB session: numeric arrays such as matrices and images, text, cell arrays and structs. Files saved with -v7.3 are HDF5 files behind a MATLAB header. Unity and Unreal material files use the .mat extension too, but they are a different format.
MIME Type: application/octet-stream
Sample: sample.mat
Wikipedia: .mat on Wikipedia

Last updated September 24, 2026