How do I convert png to dxf autocad on Windows PC?

LibreCAD is a free, open-source 2D CAD application available on Windows, Mac, and Linux. It's a solid tool for drafting and editing DXF/DWG files directly, but it's important to note upfront: LibreCAD does not have image tracing or raster-to-vector conversion built in. 

Why use LibreCAD to convert png to dxf:

Since it can't trace bitmaps itself, LibreCAD is best used as the final step in a pipeline, not the vectorizing step:

* Trace the PNG elsewhere first — use the Path → Trace Bitmap to convert the PNG into vector paths, and export as SVG

* Open/import the vector file in LibreCAD — LibreCAD can import DXF and some other vector formats for further editing

* Clean up and finalize as DXF — use LibreCAD's precise CAD tools (snapping, dimensioning, layer management) to refine the geometry, ensure closed paths, set correct units, and export a clean DXF

Some workflows skip LibreCAD's import step entirely and just use it to export DXF directly (since it does have native DXF export), using LibreCAD free PNG to DXF converter only afterward if further CAD-specific editing or verification is needed.