gmsh_io, a FORTRAN90 code which can read and write the files used by the GMSH meshing program.


The computer code and data files made available on this web page are distributed under the MIT license


gmsh_io is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

FEM_TO_GMSH, a FORTRAN90 code which reads FEM files definining a 1D, 2D or 3D mesh, namely a file of node coordinates and a file of elements defined by node indices, and creates a Gmsh mesh file.

GMSH, examples which illustrate the use of the Gmsh program, a 1D, 2D or 3D mesh generator that can create meshes suitable for use by the finite element method (FEM).


GMSH_TO_FEM, a FORTRAN90 code which reads a mesh data file created by the GMSH program and writes a pair of node and element files that correspond to the FEM format.

MSH, a data directory of examples of MSH files, the native 3D mesh format used by Gmsh.


  1. Christophe Geuzaine, Jean-Francois Remacle,
    Gmsh: a three-dimensional finite element mesh generator with built-in pre- and post-processing facilities,
    International Journal for Numerical Methods in Engineering,
    Volume 79, Number 11, pages 1309-1331, 2009.

Source Code:

Last revised on 11 July 2020.