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Instead of CAD Assistant

CAD Assistant alternatives

CAD Assistant is a free offline viewer and converter for 3D CAD and mesh files, available on desktop and mobile platforms. It supports formats such as STEP, IFC, IGES, BREP, glTF, JT, STL, OBJ and 3DM. Users can inspect assembly trees and geometric properties, analyze PLY meshes, and, on desktop, create path-traced screenshots. Processing stays on the device. Commercial use is allowed, but imports handled by commercial Open Cascade components cannot be exported or converted.

1. 1

   HOOPS Exchange

   Free trial AndroidiPhoneLinux+3

   Developers adding broad CAD import and export to applications — HOOPS Exchange is a C++ SDK with broad CAD import and export, while CAD Assistant is a standalone viewer and converter.

   6.2 60-day trial Visit site
2. 2 O

   Open Asset Import Library (Assimp)

   Free plan AndroidiPhoneLinux+3

   Developers loading and processing many 3D formats — Assimp loads more than 40 formats into a shared in-memory format and offers mesh processing, rather than CAD Assistant’s standalone inspection and conversion.

   7.1 Open source Visit site
3. 3

   Convert3D

   Free plan APILinuxMac+2

   Browser-based conversion, previews, compression, and APIs — Convert3D adds browser-local conversion, model previews, compression, and a batch-capable REST API to format conversion.

   7.4 Free plan · paid from $899/yr Visit site
4. 4 O

   ODA File Converter

   Free plan AndroidLinuxMac+1

   Batch conversion between DWG and DXF versions — ODA File Converter focuses on version conversion for DWG and DXF, with batch, recursive, and audit options.

   7.1 Free plan Visit site
5. 5 S

   Spin 3D

   Free plan MacWebWindows

   Non-commercial mesh conversion and batch cleanup — Spin 3D focuses on mesh conversion, batch processing, previews, and mesh correction, while CAD Assistant also handles CAD formats and model inspection.

   6.8 Free plan Visit site
6. 6 F

   FBX-glTF-conv

   Free plan LinuxMacWindows

   Command-line FBX-to-glTF conversion for Cocos Creator use — FBX-glTF-conv is a command-line FBX-to-glTF converter with animation and texture support, not a general CAD viewer or converter.

   7.2 Free plan Visit site
7. 7 F

   FBX2glTF

   Free plan LinuxMacWindows

   Command-line FBX-to-glTF 2.0 conversion — FBX2glTF converts FBX assets to glTF 2.0, with animation baking, optional Draco compression, and PBR material conversion.

   7.2 Free plan Visit site
8. 8 3

   3D CAD Converter

   Free plan Windows
   7.3 30-day trial Visit site
9. 9

   3D Model Converter

   Free plan Web
   7.2 Free plan · paid from $9.90/mo Visit site
10. 10

    Cadster 3D Converter Core

    Free plan APIWeb
    7.2 Visit site
11. 11

    3D-Tool

    Free plan Windows
    7.1 Free plan · paid from €200 · 14-day trial Visit site
12. 12

    Convertpoly

    Free plan Web
    7.0 Free plan Visit site
13. 13 M

    meshio

    Free plan LinuxMacWindows
    7.0 Open source Visit site
14. 14 O

    Online 3D Converter

    Free plan AndroidiPhoneWeb
    6.9 Free plan Visit site
15. 15 M

    MeshFormat

    Free plan Web
    6.8 Free plan Visit site
16. 16 3

    3D_Evolution

    Free trial APILinuxMac+3
    6.6 Pricing on request Visit site
17. 17 N

    NEXUS Model Converter

    Free plan WebWindows
    6.6 Free plan Visit site
18. 18 S

    Simpel3D

    Free plan Web
    6.6 Free plan · paid from $1.99 Visit site
19. 19 V

    Vertessia

    Free plan APIWeb
    6.6 Free plan · paid from $19/mo Visit site
20. 20 M

    meshfile

    Free plan Linux
    6.5 Free plan Visit site
21. 21 C

    CAD Exchanger

    Free trial AndroidAPIiPhone+5
    6.4 Pricing on request Visit site
22. 22 3

    3D InterOp

    Free trial APILinuxMac+2
    6.2 Pricing on request Visit site
23. 23

    NuGraf

    Free trial MacWindows
    5.7 From $495 Visit site
24. 24 C

    CADdoctor

    Paid WebWindows
    5.6 Pricing on request Visit site

A different tool may suit you better if you need a developer SDK, browser-based conversion, batch workflows, mesh cleanup, or a converter focused on particular formats. CAD Assistant’s device limits may also matter: large files can take time, low-range GPUs may be slow, and scenes with several million triangles may be terminated. Before switching, weigh the formats and operations you need, whether you want a standalone viewer or software to integrate into an application, and which platforms matter. Also check commercial-use terms and any conversion or animation constraints.

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