DXF drawings or graphics, which are created with CAD- and graphic- programs, and scanned pictures contain often curves and arcs, which have been saved as polylines. Due to the large number of line elements the further processing of such drawings is often very time-intensive and difficult. The software DXF R12 CNC Polyline Reducer converts quickly such polylines graphics for further processing in arcs and longer lines. The number of elements in the graphics is greatly reduced by this software and thus also the time for further processing is reduced. For the CNC area the program includes a function to smooth curves. This function converts curves into preferably tangential arcs and lines. This enables smooth, qualitatively better workpiece contours. The software is ideal for converting drawings that are saved in the DXF format version 12 (DXF R12 or lower).