Mayo is a 3D CAD viewer and converter based on Qt and OpenCascade.
Mayo can read/write 3D files from/to STEP, IGES, STL and many other CAD formats. Mayo 3D viewer supports clip planes, exploding of assemblies, measurement of shapes, and show/hide parts.
This is free and open source software.
Key Features
- 3D clip planes with configurable capping.
- 3D exploding of the model tree allowing better exploration of complex designs.
- 3D measure tools for circles, angles, lengths, areas, bounding box, …
- 3D view cube providing intuitive camera manipulation.
- Quick access to CAD files recently open thanks to thumbnails in the Home page.
- Toggle item visibility within the Model tree(use checkbox).
- Customizable mesh precision for BREP shapes, affecting visualization quality and conversion into mesh formats.
- Convert files to multiple CAD formats from command-line interface.
- Formats supported:
- Import: STEP, IGES, BREP, DXF, OBJ, glTF, VRML, STL, AMF, PLY, OFF, 3MF, 3DS, FBX, Collada, X3D, and X (DirectX).
- Export: STEP, IGES, BREP, OBJ, glTF, VRML, STL, AMF, PLY, OFF and image files (including PNG and JPEG).
- Cross-platform support – runs on Linux, macOS, and Windows.
Website: github.com/fougue/mayo
Support:
Developer: Fougue Ltd
License: BSD 2-Clause “Simplified” License

Mayo is written in C++. Learn C++ with our recommended free books and free tutorials.
Related Software
| 3D Model Viewers | |
|---|---|
| ParaView | Data analysis and visualization application based on VTK |
| F3D | Fast and minimalist 3D viewer desktop application |
| MeshLab | Processes and edits 3D triangular meshes |
| Online 3D Viewer | Browser-based application for inspecting 3D models |
| Mayo | 3D CAD viewer and converter |
| fstl | Viewer for .stl files. It uses Qt |
| Castle Model Viewer | Supports 3D and 2D model formats |
| fstl-e | Fork of fstl with some fancy enhancements |
| Exhibit | 3D model viewer for the GNOME desktop |
| Tatlin | 3D STL and Gcode viewer |
| voxcii | Terminal-based ASCII 3D model viewer |
| dcat | Terminal-based 3D model viewer |
| Trophy | Terminal 3D model viewer |
| term3d | Terminal-based 3D model viewer |
| j3d | Interactive viewer for 3D meshes and point cloud data |
| rasterminal | Terminal-based 3D model viewer with software rendering |
Read our verdict in the software roundup.
LinuxLinks helps you discover the best free and open source software for Linux. Explore our extensive collection of recommended applications, including alternatives to popular proprietary software.We also publish software reviews, Linux tutorials, hardware reviews, free programming books and articles covering the wider open source community. Browse our Linux resources to discover more. Know a useful free and open source Linux application we haven't covered? Suggest a program for inclusion. Has your software been featured on LinuxLinks? Display one of our Featured on LinuxLinks badges on your website or GitHub README. |


Please read our Comment Policy before commenting.