Convert STL to DXF Online
Convert STL 3D models to DXF directly in your browser — a free STL to DXF converter with no upload and no install. Preview the geometry, then download a DXF R12 file with each triangle written as a 3DFACE entity.
This free STL to DXF converter works entirely in your browser — nothing is uploaded, and there's nothing to install.
Drop your STL file here
Supported format: .STL
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- Triangles
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Frequently Asked Questions
What is a DXF file?
DXF (Drawing Exchange Format) is a widely supported CAD interchange format, most commonly used for 2D drafting but also able to carry 3D geometry.
How is a 3D mesh represented in DXF?
Each triangle is written as its own 3DFACE entity — the most broadly compatible way to carry a triangulated mesh in DXF, readable by virtually every CAD, CAM, and laser-cutter package.
Is the output a solid model?
No. Like this app's STEP converter, this produces a collection of flat triangular face patches, not a parametric or watertight solid — DXF is a drafting format, not a solid-modeling one.
Which DXF version does this produce?
DXF R12 (AC1009), the version with the widest compatibility across CAD and CAM software, including older tools.
Is my STL file uploaded to a server?
No. The conversion happens entirely in your browser. Your file is never sent to our servers.
Why is my DXF conversion slow or the file huge?
DXF represents each triangle as roughly 28 lines of text. Models with tens of thousands of triangles can take noticeably longer to convert and produce much larger files.