<br>

</div> <div align="center"> <img src="images/appicon_256.png" alt="Logo" width="128px" align="center" /> <p></p> <p align="center"><strong>Mayo</strong> the opensource 3D CAD viewer and converter</9> <p></p> <img src="doc/screencast_1.gif"/> </div>

:eyeglasses: Overview

Convert 3D files <br/> Mayo can read/write 3D files from/to STEP, IGES, STL and many other CAD formats
Visualize 3D files <br/> Mayo 3D viewer supports clip planes, exploding of assemblies, measurement of shapes, show/hide parts, ...
Cross platform <br/> Mayo runs on Windows, Linux and macOS
Solid foundations <br/> 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<br/> There's also a complete video on YouTube

:zap: 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:computer:

:floppy_disk: Supported formats

Format | Import | Export | Notes ----------|--------------------|--------------------|------------------ STEP | :white_check_mark: | :white_check_mark: | AP203, 214, 242 IGES | :white_check_mark: | :white_check_mark: | v5.3 BREP | :white_check_mark: | :white_check_mark: | OpenCascade format DXF | :white_check_mark: | :x: | OBJ | :white_check_mark: | :white_check_mark: | glTF | :white_check_mark: | :white_check_mark: | 1.0, 2.0 and GLB VRML | :white_check_mark: | :white_check_mark: | v2.0 UTF8 STL | :white_check_mark: | :white_check_mark: | ASCII/binary AMF | :white_check_mark: | :white_check_mark: | v1.2 Text/ZIP(export) PLY | :white_check_mark: | :white_check_mark: | ASCII/binary OFF | :white_check_mark: | :white_check_mark: | 3MF | :white_check_mark: | :x: | 3DS | :white_check_mark: | :x: | FBX | :white_check_mark: | :x: | Collada | :white_check_mark: | :x: | X3D | :white_check_mark: | :x: | X(DirectX)| :white_check_mark: | :x: | Image | :x: | :white_check_mark: | PNG, JPEG, ...

See also this dedicated wikipage for more details

:mag: 3D viewer operations

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, ...)

:package: Install

Release packages are available for Windows and Linux on the Releases page.

Alternatives for Windows:

Winget

winget install --id Fougue.Mayo

Scoop

scoop bucket add extras
scoop install extras/mayo

:hammer: How to build

Instructions for Windows
Instructions for Linux
Instructions for macOS

:clapper: Gallery

Easy to use command-line utility for batch conversion of CAD files <img src="doc/screencast_cli.gif"/>

Import of glTF file with textures <img src="doc/screenshot_2.png"/>

Import of STEP file with many parts <img src="doc/screenshot_3.png"/>

Import of PLY file defining point cloud <img src="doc/screenshot_6.png"/>

Options dialog with import/export configuration per CAD format <img src="doc/screenshot_4.png"/>

Home page with quick access to recent files <img src="doc/screenshot_5.png"/>

Mayo

Install / Use

README