Download and install DXF Converter, then launch this tool.

Step 1:select
from the three types: DWG to DXF, DXF to DWG or Version Conversion.
Step 2:Click the Browse button to select a folder for input files

Step 3:Select output version from the list box, the default value will be current version
Step 4:Click
, the convert will begin to convert files.
Note: if you only want to convert a single file, check the option: I only want to covert a single file. The Converter will let you open a file to convert.
free trial version
DXF
Abbreviation of Data Exchange File, a two-dimensional graphics file format supported by virtually all pc-based CAD products.` It was created by AutoDesk for the AutoCAD system.
DXF files can be either ASCII (DXF) or binary format (DXB).
The OpenDWG Alliance is an association of users and vendors who are committed to the promotion of Autodesk's DWG drawing file format as an open industry standard for the exchange of computer aided design (CAD) drawings.
Free dxf file converter, why not have a try! Just free download DXF Converter!