Though both the online converting tools and software to convert mp3 files are used to convert the videos it is better to use software because they are safer than online converters and work offline conversion with offline videos. This creates a risk of viruses and it is possible for your device and the private information to get hacked as you have to include the information in their server. Moreover, the software can support any type of file ranging from small to large but it is not true with online converters. And users can enjoy more features of the app than online converters. To convert the YouTubing to mp3 files you have to copy the link in their sites and download them from them to your device.