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Install Mayo using Winget - wingetCollections
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Mayo Fougue

Use this command to install Mayo:
winget install --id=Fougue.Mayo -e

Mayo the opensource 3D CAD viewer and converter

Mayo is a free and open-source 3D CAD viewer and converter designed to visualize, analyze, and convert 3D models across various file formats. Built on Qt and OpenCascade, Mayo offers a robust platform for working with CAD data, supporting both modern C++ development practices and cross-platform compatibility.

Key Features:

  • 3D Clip Planes: Configure capping planes to isolate specific sections of a model for detailed analysis.
  • Assembly Exploding: Break down complex assemblies into individual components for easier exploration.
  • Measurement Tools: Calculate lengths, angles, areas, and bounding boxes directly within the viewer.
  • View Cube Navigation: Intuitive camera controls for precise manipulation of 3D models.
  • Command-Line Conversion: Efficiently convert files between CAD formats using Mayo's CLI utility.

Audience & Benefit:

Ideal for CAD professionals, engineers, and designers seeking a reliable tool to handle complex 3D data. Mayo provides high precision in both visualization and conversion, enabling seamless workflow integration across platforms and file types. It supports a wide range of formats, including STEP, IGES, STL, glTF, PLY, and more.

Mayo can be installed via winget on Windows for quick setup.

README

Windows CI Linux CI macOS CI Codacy Badge Downloads Version

Mayo the opensource 3D CAD viewer and converter

:eyeglasses: Overview

  • 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

: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, ...

Versions
0.9.0
0.8.0
0.7.0
0.6.0
Website
github.com
License
Last Updated
5/15/2025

  • 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

    FormatImportExportNotes
    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

    OperationMouse/Keyboard controls
    RotatemouseLeft + move
    PanmouseRight + move
    ZoommouseLeft + mouseRight + move
    Zoom +/-mouseWheel(scroll)
    Window zoomCTRL + mouseLeft + move
    Instant zoomspaceBar
    Select ObjectmouseLeft click
    Select ObjectsSHIFT + 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

    Import of glTF file 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