DwgIO

DwgIO is a .NET library and command line tool that reads Autodesk AutoCAD drawings (.dwg) directly from disk, without AutoCAD or the AutoCAD API, and exports their metadata and contents to JSON.

• Detects the DWG version of a file, from AC1012 (R13) to AC1032 (R2018).
• Opens the container of AutoCAD 2004 and later drawings and reads named sections as decompressed bytes.
• Parses drawing metadata: summary information, application information, file dependencies and the thumbnail preview.
• Decodes the geometry of LINE, CIRCLE, ARC and POINT entities.
• Writes a JSON export of the metadata, the section catalog and the decoded entities.

The library targets .NET 8 and .NET 10, uses managed code only, and supports Windows, Linux and macOS.

Where to go next

• Getting started: install the tool or the package and read a first drawing.
• Public API: the supported surface of the library.
• API reference: every public type, generated from the XML documentation.
• Source on GitHub and DeepWiki for an automatically generated overview of the repository.

DwgIO is not affiliated with, endorsed by or sponsored by Autodesk. Autodesk and AutoCAD are trademarks of Autodesk, Inc.