Based on our over 25 years experience, CAD Interop recommends below the most relevant CAD formats to convert your data between major CAD systems. To date, the most common exchange format is the STEP format, the most complete and available for the majority of CAD software. But, when possible, it is preferable to use the geometry kernel of the software (such as Parasolid for NX, SolidWorks or Solid Edge) which will allow to read the geometry without translation. If you want to provide read-only access to your CAD data for users who do not have a viewer or other CAD software, we recommend using the 3D PDF format in its faceted (lighter) version.
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(*) recommended neutral file format for 3D geometry interoperability
(1) Only major neutral file formats are listed. Some CAD systems may have some limitations with specific format.
CAD Interop distributes several solutions to view, translate or validate CAD files. Find below the list of our products compatible with major CAD formats.
CAD data interoperability is a central issue for technical design professionals, where Autodesk's AutoCAD plays a prominent role. This article explores the mechanisms, challenges, and technical solutions to optimize multidisciplinary workflows while enhancing the digital visibility of specialized content.
Files created with AutoCAD primarily use two Autodesk proprietary formats:
In addition to these proprietary formats, AutoCAD supports an industry standard to ensure interoperability:
The .dwg format encapsulates complex metadata including dimensional information, line styles, and parametric data, making it a rich format but vulnerable to version incompatibilities.
The .dxf, specifically developed to circumvent .dwg limitations, allows neutral interpretation of graphic entities via ASCII or binary structure. However, comparative tests reveal an average loss of 12% of advanced properties during repeated conversions between .dwg and .dxf.
The ACIS (Advanced CAD Interface System) engine, integrated into AutoCAD, ensures geometric consistency between Autodesk products. Its differential tolerance algorithm (δ=1e-6 mm) guarantees topological precision during imports/exports. For exchanges with external software, AutoCAD implements:
Benchmarks indicate that conversions via STEP preserve 89% of tolerance edges compared to 67% for IGES, making it the preferred format for critical exchanges.
AutoCAD's Xref (External Reference) function allows linking external DWG/DXF files without direct incorporation, reducing master file sizes by 30 to 70% depending on complexity. The optimal procedure includes:
This approach minimizes version conflicts and preserves source data integrity.
Interfacing with Revit requires an adaptive conversion strategy:
Tests show that linking DWG files in Revit preserves 92% of annotations compared to 78% for direct imports, validating the referenced approach.
CAD Interop tools optimize interoperability pipelines via:
Our tools are designed to meet the requirements of professionals wishing to optimize their workflows while preserving the quality and integrity of their AutoCAD CAD data.
Data interoperability within the AutoCAD ecosystem is a major challenge for technical drawing and modeling professionals. Beyond the theoretical aspects mentioned above, this section presents proven techniques to optimize exchanges between AutoCAD and other software while preserving data integrity. These methods, validated by Autodesk and experienced users, cover the main CAD integration challenges encountered in industrial workflows.
Transforming 2D data into 3D models utilizes several complementary approaches. AutoCAD's 3D workspace allows extruding 2D plans via commands like FLATSHOT and SOLPROF, particularly effective for generating technical profiles. The ReconSprite 2D to 3D Converter add-on automates the conversion of multi-view plans into parametric 3D models, with optimal handling of dimensions and annotations.
Exporting DWG models to STL requires rigorous preparation. After verifying 3D solids via CHECKSTANDARDS, use EXPORT > Other Formats > Lithography (*.stl). For complex objects, the STLOUT command allows granular control over mesh resolution, essential for limiting printing artifacts. A lesser-known tip involves preliminary export to 3D polymesh (AutoCAD 2004 DWG) followed by EXPLODE to correct surface irregularities.
AEC (Architecture, Engineering, Construction) objects require specific conversion to maintain their interpretability. The EXPORTTOAUTOCAD command transforms these elements into standard AutoCAD entities, with critical options:
AutoCAD excels in exchange via open standards. The STEP (AP242) format is the reference for multiphase exchanges, preserving function trees and geometric tolerances. For BIM interoperability, certified IFC4 export ensures seamless integration with Revit and Navisworks. An advanced practice combines IGES for raw geometry and DWFx for metadata, thus optimizing collaborative project reviews.
Data exchange between different CAD systems represents a crucial challenge for industrial companies. This article explores interoperability solutions for I-DEAS software, presenting its native formats, exchange capabilities, and available tools to facilitate model conversion and analysis.
I-DEAS (Integrated Design and Engineering Analysis Software) is a Computer-Aided Design system initially developed by SDRC (Structural Dynamics Research Corporation) in the 1980s. This software experienced a major evolution with its Master Series version, widely used in aerospace, automotive, and manufacturing industries for its advanced 3D modeling capabilities.
In 2001, EDS acquired SDRC and merged I-DEAS with Unigraphics to create NX. Subsequently, Siemens PLM Software (now Siemens Digital Industries Software) took over the software development. While active development of I-DEAS has ceased in favor of NX, many companies continue to use I-DEAS for their existing designs and technical archives.
Main application areas of I-DEAS:
I-DEAS uses several specific file extensions for its different functionalities:
Interoperability has always been a strength of I-DEAS, allowing data exchange with other CAD systems. According to available information on formats supported by our tools, I-DEAS is compatible with several industry standard formats:
Supported import/export formats:
3DViewStation offers a powerful solution for visualizing and analyzing I-DEAS models without requiring installation of the original software. According to the most recent information (February 2025), 3DViewStation supports the following I-DEAS formats:
The 3DViewStation solution also allows export to other formats, thus facilitating the conversion of I-DEAS models to more recent or universal formats.
DEXcenter is a CAD data exchange automation platform that offers specific functionalities for I-DEAS models:
This solution allows companies using I-DEAS to implement robust data exchange processes with their partners, subcontractors, or customers using other CAD systems.
To optimize the interoperability of I-DEAS models, here are some recommended best practices:
Model preparation before export:
Choice of exchange format:
Validation after conversion:
Despite its age, I-DEAS remains present in many industrial companies, particularly for long-term projects and historical data. Modern interoperability solutions such as 3DViewStation and DEXcenter allow efficient integration of this data into current digital environments.
Expertise in I-DEAS data conversion and validation remains a valuable asset for aerospace, automotive, and manufacturing industries that must maintain digital continuity of their products over several decades.
For more information on our CAD interoperability solutions for I-DEAS or for a personalized demonstration, contact our CAD Interop experts.
May 27, 2025, CAD Interop presents the latest evolution of the leading 3D visualization solution: 3DViewStation 2025.2.312. This update brings significant improvements in CAD compatibility, export performance, and advanced features for industry professionals working with complex 3D models.
This version strengthens the position of 3DViewStation as a universal visualization platform, providing technical teams with more powerful tools to optimize workflows and boost daily productivity.
CADEX-SOFT announces the release of CAD Exchanger 3.24.11, a major update that extends compatibility with two essential new formats while improving support for DWG proxy entities. This version also optimizes the reliability of shape healing algorithms, offering an even more robust solution for multi-CAD work environments and industrial design workflows.
Paris, Wednesday, April 2, 2025, We are pleased to present the latest update from KISTERS, 3DViewStation 2025.1.187, available today. This version consolidates and optimizes the revolutionary features introduced in version 2025.0 launched last March, while bringing targeted improvements to meet the needs of industry professionals.
The latest release of DEXcenter, now available on AWS Marketplace, transforms how professionals automate CAD data exchanges with enterprise-grade security. Developed by ITI (a Wipro company), this cloud-based SaaS solution combines intelligent automation, regulatory compliance, and technical data packaging for global manufacturing and engineering teams.
Paris, Tuesday, March 11, 2025 - We are pleased to announce the release of CADfix PPS 5.1, the latest version of ITI's CAD model simplification and file size reduction solution.
CADfix PPS establishes itself as the essential tool for professionals dealing with overloaded CAD assemblies. Specifically designed for process engineering, energy, marine, and offshore industries, this software helps reduce costs and timelines by up to 80% when integrating complex models into plant design systems. Its strength lies in intelligently deconstructing assemblies, converting parts into primitive shapes (boxes, cylinders, cones), and automatically removing unnecessary details like internal drillings or logos.