1. Free DXF Viewer
As we know, the CAD programs which can be used to view, edit and output DXF files are never becoming cheap for unprofessional ones to keep one in hand. It also will cost a little to use third-party program to convert DXF to PDF to view the DXF format files. So it is not a curious thing anymore to see the asks for free DXF Viewer over the Internet.
Once you are one of the persons who are looking for free ways to view DXF files, then you can just read through this article to find solutions here. In the following details, you can find DXF Viewer freeware and Online DXF Viewer service to view DXF files for free without CAD programs. What's more, the exact operations of how to use these free DXF viewers to view AutoCAD DXF files are also provided for your reference.

2. Solution 1: How to View DXF Files for Free with Free DXF Viewer
Free eDrawings Viewer is rightly a program which provides you with a free way to view AutoCAD DXF and DWG files and the native SolidWorks parts, assemblies, and drawings. Once you don't have a CAD program in hand but want to view the DWX or DWG format files, then this freeware would be your good choice.
Step 1: Download and install the Free eDrawings Viewer by following the pop-up installation instructions

3. Step 2: Once you start the software, there will be a dialog popping up to ask you to register. You can just skip it and click the "File -> Open" to select and input your target DXF file to view it.

4. Solution 2: How to View DXF Files for Free with Online DXF Viewer
Besides using the above mentioned DXF Viewer freeware, you can also directly use online services to view your DXF files for free. Once use the Online DXF and DWG Viewer, it means you have no need to install any app on your desktop for viewing DXF or
Step 1: Visit the Online DXF Viewer.

5. Step 2: Click "Browse. " to select a DXF document to upload the file
Step 2: Click "Browse..." to select a DXF document to upload the file. Once you've chosen a DXF file, you can then click "Ok" to view it. You might need to wait for a while for viewing the DXF file.
The introductions on free ways for viewing DXF file are rightly finished. By the way, if you want to view DXF file on your portable devices, then the above two free solutions would be not available any longer. The best way for you to view DXF files on portable equipment would be to convert them to PDF format files. The Online DXF to PDF Converter and pro DXF to PDF Converter are all able to help you much for converting DXF files to PDF.