Mayo the opensource 3D CAD viewer and converter
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Convert 3D files
Mayo can read/write 3D files from/to STEP, IGES, STL and many other CAD formats -
Visualize 3D files
Mayo 3D viewer supports clip planes, exploding of assemblies, measurement of shapes, show/hide parts, ... -
Cross platform
Mayo runs on Windows, Linux and macOS -
Solid foundations
Mayo is developed in modern C++ with Qt and OpenCascade
For more details have a look at this fine review Introducing Mayo by Libre Arts
There's also a complete video on YouTube
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3D clip planes with configurable capping
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3D exploding of the model tree allowing better exploration of complex designs
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3D measure tools for circles, angles, lengths, areas, bounding box, ...
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3D view cube providing intuitive camera manipulation
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Quick access to CAD files recently open thanks to thumbnails in the Home page
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Toggle item visibility within the Model tree(use checkbox)
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Customizable mesh precision for BREP shapes, affecting visualization quality and conversion into mesh formats
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Convert files to multiple CAD formats from command-line interface💻
| Format | Import | Export | Notes |
|---|---|---|---|
| STEP | ✅ | ✅ | AP203, 214, 242 |
| IGES | ✅ | ✅ | v5.3 |
| BREP | ✅ | ✅ | OpenCascade format |
| DXF | ✅ | ❌ | |
| OBJ | ✅ | ✅ | |
| glTF | ✅ | ✅ | 1.0, 2.0 and GLB |
| VRML | ✅ | ✅ | v2.0 UTF8 |
| STL | ✅ | ✅ | ASCII/binary |
| AMF | ✅ | ✅ | v1.2 Text/ZIP(export) |
| PLY | ✅ | ✅ | ASCII/binary |
| OFF | ✅ | ✅ | |
| 3MF | ✅ | ❌ | |
| 3DS | ✅ | ❌ | |
| FBX | ✅ | ❌ | |
| Collada | ✅ | ❌ | |
| X3D | ✅ | ❌ | |
| X(DirectX) | ✅ | ❌ | |
| Image | ❌ | ✅ | PNG, JPEG, ... |
See also this dedicated wikipage for more details
| Operation | Mouse/Keyboard controls |
|---|---|
| Rotate | mouseLeft + move |
| Pan | mouseRight + move |
| Zoom | mouseLeft + mouseRight + move |
| Zoom +/- | mouseWheel(scroll) |
| Window zoom | CTRL + mouseLeft + move |
| Instant zoom | spaceBar |
| Select Object | mouseLeft click |
| Select Objects | SHIFT + mouseLeft clicks |
Mayo supports also multiple 3D viewer navigation styles to mimic common CAD applications(CATIA, SOLIDWORKS, ...)
Release packages are available for Windows and Linux on the Releases page.
Alternatives for Windows:
winget install --id Fougue.Mayo
scoop bucket add extras
scoop install extras/mayo
Instructions for Windows
Instructions for Linux
Instructions for macOS
Easy to use command-line utility for batch conversion of CAD files
Import of glTF fil
59CD
e with textures
Import of STEP file with many parts
Import of PLY file defining point cloud
Options dialog with import/export configuration per CAD format
Home page with quick access to recent files