Gmsh is a 3D finite element mesh generator with built-in pre- and post-processing facilities.

Its design goal is to provide a fast, light and user-friendly meshing tool with parametric input and advanced visualization capabilities. Gmsh is built around four modules: geometry, mesh, solver and post-processing. The specification of any input to these modules is done either interactively using the graphical user interface, in ASCII text files using Gmsh's own scripting language, or using the C++, C, Python or Julia Application Programming Interface (API).

The Gmsh project was started in 1996, and open sourced in 2003. Major milestones include: Gmsh 2 in 2003 with OpenCASCADE integration, Gmsh 3 in 2017 with curvilinear meshing and boolean operations, and Gmsh 4 in 2018 with a stable C++, C, Python and Julia API.

Gmsh is released under the GNU General Public License (GPL), version 2 or later. Commercial licenses allowing to embed Gmsh in closed-sourced software are also available: see the website for more information.

Industrial sector: 
Automotive, Aeronautics, Mechanical, Electrical, Electronics, Geotechnics, Biomedical
Software type: 
Open Source
Scope of application: 
3D modeling, FEM, Pre-processing, Post-processing
Functionality / feature-set: 
Parametric geometry construction; 1D, 2D and 3D multi-threaded FEM generation; Support for unstructured, structured and hybrid meshes; Handling of non-manifold models; High-order (curvilinear) mesh generation; Remeshing of discrete (STL) geometries, Graphical user interface; Post-processing and visualization of scalar, vector and tensor data
Suitable for: 
Freelance, Enterprises, Personal, Startups, SMEs, Research & Science
Deployment options: 
Web: Cloud
SaaS; Web-based; Desktop: Mac
Linux; Mobile/Tablet: Android
Programming Languages: 
C++, Python, C, Julia
Support Options: 
Phone, Email, Forum/Community, FAQ/Knowledge Base, Video Tutorials/Webinar
Training Options: 
In Person, Live, Documentation, Videos
C. Geuzaine and J.-F. Remacle