Autodesk Developer Network


Get to market faster and give your products a competitive edge with the RealDWG® software development kit (SDK) from Autodesk. It's the only software development toolkit that provides DWG™ file read/write capability from the source.

The RealDWG toolkit helps you share design data with confidence using the native DWG file format. So you can create applications with 100 percent DWG read/write capability. Deliver your products with the latest DWG file technology and DWG viewers available from Autodesk.

The RealDWG software library allows C++ and .NET developers to read and write DXF™ and DWG™ files created with AutoCAD® software. The most current version of RealDWG provides compatibility with AutoCAD DWG files, including read and write support for AutoCAD releases since AutoCAD Release 14 and drawing enhancements available with the most current version of AutoCAD. RealDWG is also used internally by Autodesk to provide DWG support in non-AutoCAD-based applications, such as Autodesk® Revit® software-based products and Autodesk® Inventor® software products.

RealDWG Frequently Asked Questions

1. What is RealDWG?
The RealDWG® developer toolkit is a software library that allows C++ and .NET developers to read and write AutoCAD® software DWG and DXF files.

2. How do I license RealDWG?
RealDWG is licensed as a software development kit (SDK) exclusively from our partners, Tech Soft 3D. To obtain a copy of the RealDWG software development kit (SDK) license application, simply download a copy from Tech Soft 3D or email them. Developers may also apply fill out and submit the license application form to obtain a copy of the RealDWG® software development kit (SDK) license application.

3. What is the difference between RealDWG and ObjectARX for AutoCAD?
RealDWG is a subset of the ObjectARX® programming environment and contains the APIs for reading and writing AutoCAD DXF and DWG files. RealDWG does not contain support for viewing and accessing the AutoCAD user interface.

Also, ObjectARX applications always require AutoCAD as their host application. RealDWG does not require the presence of AutoCAD software. RealDWG is used to create host applications, but ObjectARX is not.

4. Is developer support or training available for RealDWG?
Developer support for RealDWG is available through the Autodesk public forums (choose the ObjectARX or .NET forum depending on which RealDWG API you are using) or through the Autodesk Developer Network (ADN).

5. Is RealDWG available for 64-bit operating systems?
Yes, RealDWG is available for both 32-bit and 64-bit operating systems. However, deployment of 32-bit applications on a 64-bit operating system is not supported.


DevTV: Introduction to RealDWG Programming
A short video tutorial to starting your first RealDWG .NET application
View online | Download

System Requirements

For 32-Bit and 64-Bit RealDWG® 2018

  • Microsoft® Windows® 7 SP1, Microsoft Windows 8.1 with Update KB2919355, Microsoft Windows 10 (64-bit only)
  • 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
  • 4 GB (8 GB recommended) RAM or more
  • 2 GB free hard disk available not including installation requirements
  • Visual Studio 2015 Update 3 (with C++ option installed)
  • Available as download only


For the Americas, Europe, the Middle East, and Africa Contact Tech Soft 3D for pricing.

RealDWG License Application Form
Autodesk’s partner, Tech Soft 3D is the worldwide exclusive reseller of RealDWG. Payments are to be made directly to Tech Soft 3D. To obtain a copy of the RealDWG® software development kit (SDK) license application, simply fill out and submit the form below. You may also download a copy from the Tech Soft 3D website or contact Tech Soft 3D via email.

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