DXF (CAD exchange)
Also known as: .dxf file, Drawing Exchange Format, how to open DXF
DXF is an open, documented CAD exchange format created by Autodesk so drawings can move between different programs. It stores the same kind of vector geometry as DWG — lines, arcs, layers, text — but in a published format, usually as readable text.
- Open, documented CAD exchange format from Autodesk
- Carries the same geometry as DWG, often as text
- Used to move drawings between CAD, CNC, and laser tools
What DXF is for
DXF (Drawing Exchange Format) was made to be the neutral go-between for CAD data. Where DWG is AutoCAD’s proprietary native file, DXF is published and widely implemented, so almost any CAD or vector tool can read and write it.
It records 2D and 3D geometry — lines, polylines, arcs, circles, layers, blocks, and text. It comes in an ASCII text form (the common, portable one) and a binary form. The text version is larger but easy to inspect and parse.
How DXF is used
DXF is the format you export when sending a drawing to software that does not handle DWG — for example, CNC machines, laser cutters, and cross-platform CAD tools. Free DWG/DXF viewers open it, and most CAD apps import it directly.
It is a translation format, so some advanced or app-specific data can be simplified on the way through. For full fidelity inside the Autodesk world, DWG is still preferred.