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3D InterOp

Paid#2 of 31 in 3D File Converter Software

3D InterOp: A broad engineering SDK for integrating high-volume CAD and BIM translation. Ranked #2 of 31 in 3D File Converter Software by our editors (9.3/10); pricing: Pricing on request; best for large-scale mixed CAD and BIM workflows.

9.3/10Editor score

Visit Spatial Corp

3D InterOp9.3 Visit Spatial Corp

At a glance

Editor score
9.3 / 10
Pricing
Pricing on request
Best for
Large-scale mixed CAD and BIM workflows
Format scope
Mixed
Founded
1986 · Broomfield, Colorado, USA
Facts checked
22 Sep 2026

Where it wins
- Reads and writes more than 30 CAD, BIM, mesh, and visualization formats
- Native CATIA and SolidWorks translation without requiring a CAD license
- Batch, concurrent, and multi-process translation for large-scale workflows
Where it doesn't
- Requires integration into an application rather than standalone use
- Pricing is handled through contact with sales
- C++ and C# interfaces may not suit teams outside those environments

Our verdict on 3D InterOp

3D InterOp is a software development toolkit from Spatial Corp for importing, exporting, and translating CAD, BIM, mesh, and visualization data inside engineering applications. It exchanges exact B-rep geometry, tessellated geometry, product structure, metadata, and product manufacturing information across more than 30 formats. The product is aimed at developers building applications for design, manufacturing, simulation, robotics, metrology, additive manufacturing, and BIM workflows rather than people seeking a standalone file-conversion service.

Its strongest advantage is breadth combined with engineering-specific control. Selective import lets applications choose product structure, tessellated geometry, exact geometry, and manufacturing information. Native CATIA and SolidWorks data translation does not require a CAD license, while automated healing, stitching, and re-surfacing address geometry preparation. Graphical and semantic PMI, geometric associativity, and CAD associativity support workflows where manufacturing information and design changes must remain connected. C++ and C# interfaces include documentation and sample implementations.

For large-scale processing, 3D InterOp includes concurrent import using multiple threads and processes, plus batch and multi-process translation. It runs on Windows, macOS, and Linux, which supports applications deployed across those platforms. The tradeoff is product shape: this is an SDK that must be integrated into another application, with implementation work required from the development team. Pricing is handled through contact with sales, and there is no AI feature set. Choose 3D InterOp when your application needs broad mixed-format exchange, native CATIA or SolidWorks translation, geometry repair, PMI, and high-volume processing. Choose another option if you need a ready-to-use consumer converter instead of an integration toolkit.

Your product? Our editors can test 3D InterOp in depth and publish a review, labelled as paid · from $149/mo →

3D InterOp pricing

Plans Pricing on requestPaid No free plan — trial or paid only. Prices checked 22 Sep 2026.

See plans on spatial.com

3D InterOp fact sheet

Free plan	Not verified
Paid from	Not verified
Format scope	Mixed
Animation conversion	Not verified
Batch conversion	Yes
API access	Yes
Maximum file size	Not verified
Supported platforms	Windows, Linux, macOS
Deployment	Cloud, Self-hosted, Desktop
Platforms	Windows, macOS, Linux
Support	Docs
Built for	Mid-market, Enterprise (editorial estimate)
Pricing	Pricing on request
Website	spatial.com
Facts checked	22 Sep 2026

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3D InterOp vs the competition

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Featured on iTechGuides

3D InterOp is listed in our 3D File Converter Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update