What is ezdxf

ezdxf is a Python interface to the DXF (drawing interchange file) format developed by Autodesk, it allows developers to read and modify existing DXF drawings or create new DXF drawings.

The main objective in the development of ezdxf was to hide complex DXF details from the programmer but still support all the possibilities of the DXF format. Nevertheless, a basic understanding of the DXF format is an advantage (but not necessary), also to understand what is possible with the DXF file format and what is not.

Not all DXF features are supported yet, but additional features will be added in the future gradually.

ezdxf is also a replacement for my dxfwrite and my dxfgrabber packages but with different APIs, both packages are in maintenance only mode, no new features will be added, but they stay available, getting bug fixes and will adapted for new Python versions.

What ezdxf is NOT

  • ezdxf is not a DXF converter: ezdxf can not convert between different DXF versions, if you are looking for an appropriate application, try the free ODAFileConverter from the Open Design Alliance, which converts between different DXF version and also between the DXF and the DWG file format.
  • ezdxf is not a CAD file format converter: ezdxf can not convert DXF files to ANY other format, like SVG, PDF or DWG
  • ezdxf is not a DXF renderer, it does not create a visual representation of the DXF file content (see above).
  • ezdxf is not a CAD kernel, ezdxf does not provide any functionality for construction work, it is just an interface to the DXF file format. If you are looking for a CAD kernel with Python scripting support, look at FreeCAD.

Supported Python Versions

ezdxf requires at least Python 3.5, for Python 2 support use ezdxf < v0.9.0, I run unit tests with the latest stable CPython 3 version and the latest stable release of pypy3 during development.

ezdxf is written in pure Python and requires only pyparser as additional library beside the Python Standard Library. pytest is required to run the provided unit and integration tests. Data to run the stress and audit test can not be provided, because I don’t have the rights for publishing this DXF files.

Supported Operating Systems

ezdxf is OS independent and runs on all platforms which provide an appropriate Python interpreter (>=3.6).

Supported DXF Versions

Version AutoCAD Release
AC1009 AutoCAD R12
AC1012 AutoCAD R13 -> R2000
AC1014 AutoCAD R14 -> R2000
AC1015 AutoCAD R2000
AC1018 AutoCAD R2004
AC1021 AutoCAD R2007
AC1024 AutoCAD R2010
AC1027 AutoCAD R2013
AC1032 AutoCAD R2018

ezdxf reads also older DXF versions but saves it as DXF R12.

Embedded DXF Information of 3rd Party Applications

The DXF format allows third-party applications to embed application-specific information. ezdxf manages DXF data in a structure-preserving form, but for the price of large memory requirement. Because of this, processing of DXF information of third-party applications is possible and will retained on rewriting.


ezdxf is licensed under the very liberal MIT-License.