Drawing Exchange Format MIME Type

Learn what model/x-dxf identifies, how Drawing Exchange Format files are encoded, and how Poly supports them.

MIME type details for model/x-dxf

In active use
MIME typemodel/x-dxf
Extensions
.dxf
First standardizedUnknown
Created byAutodesk or ISO 10303 standards community
Browser support
Example applicationsAutoCAD, LibreCAD
Poly supportPartial. Poly recognizes this 3D media type and processes supported files.
Indexed by PolyYes. Poly indexes filenames and visual similarity for processed geometry; scene counts are displayed in Details.
Preview in PolyPartial. Poly provides an interactive preview for supported constructs.
Poly agentYes. An optimized rendition of the 3D object or scene is provided to the agent, allowing compact yet information-rich multimodal interaction with 3D files.

What does model/x-dxf mean?

DXF is Autodesk's interchange format for drawing data. ASCII DXF stores group-code and value pairs; binary DXF stores the same drawing information compactly. Autodesk documents a binary sentinel beginning AutoCAD Binary DXF and says binary files are about 25% smaller in its comparison.1 DXF can contain layers, blocks, polylines, faces, and other drawing entities.

The associated extensions are .dxf. The media type identifies the format family; it does not convert bytes or guarantee that a reader supports every entity.

Poly support

Poly can recognize this type as 3D content and index filenames and visual similarity for processed geometry; scene counts are displayed in the Details panel. An optimized rendition of the 3D object or scene is provided to the agent, allowing compact yet information-rich multimodal interaction with 3D files.

ConstructWhat to expect
Geometry and scene structureAvailable when import succeeds.
Materials and texturesDepends on source constructs and supported rendition features.
Lighting, cameras, and animationAvailable when present and supported.

Opening and conversion

Use a format-aware application when preserving editability matters. Conversion to glTF or OBJ can improve interchange for 3D viewing, while CAD and BIM workflows should retain the original schema and exchange context.

Footnotes

  1. https://help.autodesk.com/cloudhelp/2023/ENU/AutoCAD-DXF/files/GUID-20172853-157D-4024-8E64-32F3BD64F883.htm.
© Poly Corp. 2026