[Core package](https://www.opendesign.com/core-package)# STEP SDK

![PDES Inc logo. PDES Inc is a consortium for product data exchange standards.](https://static.opendesignalliance.cn/themes/oda/img/products/step/top/PDES.png)

[rings-desktop-mobile.mp4](https://www.opendesign.com/files/2025-10/rings-desktop-mobile.mp4)

Desktop & mobile

- STEP X
- AP203
- AP214
- AP242

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[Free 60-Day Trial](https://www.opendesign.com/free-trial)

## Features

- Access

     100% including C++, SDAI and early-bound ways, GD&T symbols through CDA
- View

    Pan, zoom, rotate, move, layers, and more
- Create

    New valid STEP / STEPX models from scratch
- Modification

    - Updating of existing instances
    - Appending of new instances into an existing model
- Writing

     Valid writing of any supported version into plain or compressed Step Physical File, stepx for Domain Mode schemas
- Validation

     Step physical file syntax, SCHEMA-defined Where Rules (WR) constraints

[Download tech datasheet](/datasheets/2025/en/STEP%20Datasheet.pdf)

## See it in action

- **Open STEP Viewer** lets you instantly visualize and validate STEP models.
- Powered by the **ODA STEP SDK**, used by developers worldwide

![Screenshot of Open STEP Viewer interface showing 3D CAD model visualization and properties panel](https://static.opendesignalliance.cn/themes/oda/img/products/step/step-viewer.webp)

[GET](https://openstepviewer.com/)

Experience the full STEP SDK capabilities with a 60-day trial

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## ODA Platform for STEP

Conversion

Hide details ###### Import

- DWG
- AP203
- AP214
- AP242

   Step

   ###### Export

- DWG
- OBJ
- STL
- 2D, 3D PDF
- AP203
- AP214
- AP242

Integration

All ODA Products

Supported STEP versions

- AP203
- AP214
- AP242ed4
- Domain Model ed.4 - StepX

  ## Roadmap

- ![](https://static.opendesignalliance.cn/themes/oda/img/products/step/sphere.svg) Dec 2022Production

    - PMI data visualization

    Beta

    - STEP advanced\_brep to ODA Solid Modeler bodies conversion
- ![](https://static.opendesignalliance.cn/themes/oda/img/products/step/sphere.svg) Dec 2023Production

    - Compressed STEP files support

    Beta

    - DWG to STEP
    - STEP to DWG
- ![](https://static.opendesignalliance.cn/themes/oda/img/products/step/sphere.svg) July 2024Production

    - DWG to STEP
    - STEP to DWG
    - StepX Assembly with JT Insertions

    Beta

    - Early-Bound access using generated classes for established schemas
- ![](https://static.opendesignalliance.cn/themes/oda/img/products/step/sphere.svg) June 2025
    - Access to PMI GD\_T symbols information using CDA
- ![](https://static.opendesignalliance.cn/themes/oda/img/products/step/sphere.svg) July 2025
    - Faces and Edges associativity with Visualize Geometry

  ## More ODA toolkits for STEP

| | STEP SDK | Visualize SDK | Publish SDK | CDE SDK |
| --- | --- | --- | --- | --- |
| Role in STEP Workflow | Core SDK for reading, writing, editing, and validating STEP data based on ISO 10303 standards. | Renders STEP geometry in high-performance environments across desktop, mobile, and web. | Converts STEP models to interactive 3D PDFs for easy sharing without needing native CAD tools. | Web-enable your STEP workflows with cloud-based data management and real-time access to STEP files. |
| Key Benefits | Full support for AP203, AP214, AP242, etc.; EXPRESS schema handling; SDAI API; wrappers for C#/C++. | Real-time 3D rendering, support for PMI, materials, and styles. | Customizable PDF templates, 2D/3D content export, annotations. | In-browser viewing, role-based access, version control, integration with BIM/PLM systems. |
| Typical Use Cases | CAD/PLM data exchange, STEP validation tools, schema-based data manipulation, automated conversion. | Web-based or native 3D viewers, review tools for STEP assemblies, visual inspection apps. | Product manufacturing documentation, client presentations, digital delivery of STEP designs. | Cloud collaboration platforms, web portals for manufacturing/ engineering teams, CDE-based STEP viewers. |

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