When searching for the "best" , you are likely dealing with the transition from legacy DesignCAD files (.dw2) to the industry-standard AutoCAD format (.dwg) . Because DW2 is a niche, proprietary format, the "best" solution is often determined by whether you need a quick one-time fix or a professional workflow. The Top Contender: TurboCAD / DesignCAD
The DWG format has evolved over dozens of iterations. A great converter lets you choose which version of DWG to output (such as AutoCAD 2000, 2013, or 2018/2024 layouts). This ensures your team members using older CAD software can still open the files. Error Checking and File Repair dw2 to dwg converter best