Convert OBJ to DWG (via DXF Projection — AutoCAD)

Convert OBJ 3D models to DWG-compatible format via 2D DXF projection for AutoCAD. Understand exactly what is preserved and what 3D data is permanently lost.

✔ What it does

Projects OBJ 3D mesh geometry onto a 2D plane and outputs DXF line entities. Opens in AutoCAD and can be saved as native DWG. Extracts outlines, silhouettes, and footprints from 3D models.

✘ What it does not do

Does NOT preserve 3D structure — this is a 2D projection only. Does NOT create full CAD models or geometry. Does NOT include textures, materials, or depth data.

How to get your DWG file — 4 steps

Upload your OBJ file below → click Convert → download the DXF file
Open the DXF file in AutoCAD (File → Open)
Go to File → Save As → select DWG format
You now have a native DWG file

Why DXF, not DWG directly? DWG is a proprietary Autodesk binary format. DXF is the open interchange standard that AutoCAD reads natively and converts to DWG in seconds using Save As.

📂

Drop your OBJ file here

or click to browse — max 50MB

Converting your file…

Conversion complete

Download DXF file

Open this DXF in AutoCAD → File → Save As → DWG to get your native DWG file.

Convert another file

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How OBJ → DWG conversion works

OBJ files store 3D geometry as vertices, edges, and faces. This tool loads the OBJ mesh and projects the geometry onto a 2D plane (XY top view by default), extracting visible edge lines and silhouettes as DXF line entities. All depth and 3D structure is permanently discarded in the projection. The resulting DXF contains 2D line geometry only. The DXF can be opened in AutoCAD and saved as native DWG using File → Save As. If you need full 3D output, use OBJ → FBX instead.

Limitations

All 3D depth is permanently lost — output is 2D line geometry only.
Textures, materials, and UV data from the OBJ are not present in DXF output.
Dense polygon meshes may produce complex, hard-to-edit DXF line work.
Requires manual cleanup for precision CAD drafting work.

When to use this conversion

Extracting floor plan footprints from 3D models for architectural drawings.
CNC cutting guide outlines from 3D product models.
Architectural silhouettes for 2D drawing reference.
Flat-pattern fabrication templates from 3D geometry.

Alternatives to consider

OBJ → FBX on this site if a full 3D format is needed for game engines.
FreeCAD's Drawing Workbench for engineering-accurate 2D drawings from 3D geometry.
Blender (File → Export → DXF add-on) for more projection axis control.

Frequently asked questions

Why is this a 2D output from a 3D model?

DWG in 2D drafting is a flat format. Projecting 3D geometry to 2D is the standard workflow for extracting CAD reference from 3D models.

I need the full 3D model in a compatible format — what should I use?

Use OBJ → FBX on this site for game engines and 3D tools, or STL → OBJ for broader 3D format compatibility.

Why don't I get DWG directly?

DWG is a proprietary Autodesk binary format. DXF is the open interchange standard — open in AutoCAD and File → Save As → DWG to get native format.