DXF, or Drawing Exchange Format, is a file format created by AutoDesk for CAD, or Computer Assisted Drawing, files. PDF, or Portable Document Format, files are used for sharing CAD files and other documents because they look the same on every computer. If you have CAD files in PDF format, you can convert them back to DXF format with a freeware application. The DXF files can again be edited in CAD programs.
Download Aide PDF to DXF Converter (See Resources) and install it by following the directions on your screen. Select a PDF file by clicking "File" and "Add a PDF File" in the Aide PDF to DXF Converter window, then browse to the PDF file and double-click it. Click the "..." button to the right of "Output DXF Folder," browse to a file for the DXF file and click "OK." Convert the PDF to a DXF by clicking the "Convert" button at the lower-right corner of the window.
Install Able2Extract (See Resources). Click "Try" and "Continue Trial" in the Able2Extract window after installing. Open a PDF file by clicking "File" and "Open" in the Able2Extract window, browsing to a PDF file and double-clicking it. Select the entire PDF file by clicking "Edit" and "Select All Pages," then convert it to a DXF file by clicking "File," clicking "Convert to DXF/DWG," and clicking "Convert." Type a name for your DXF file in the save dialog and click "Save," then click "Complete Conversion."
Use AutoDWG's PDF to DXF Converter (See Resources). Click the "..." button to the right of the "Please Select a PDF File to Convert" box in the PDF to DXF Converter window after installing it, browse to a PDF file and double-click it. Click "DXF" next to "File Type" under "Output" and convert the PDF file by clicking "Convert" at the lower-right corner of the window.