Convert MP3 to Video or convert video to MP3 with this free, online service. MP3Toolbox makes the process very easy: just pick the MP3 or video you want to convert and the site does the rest. After a few seconds, you can download the converted video or MP3. It's that simple! In addition, MP3Toolbox lets you post the generated video to Facebook or YouTube. In other words, you can now share your MP3 with your friends through Facebook. Videos were not forgotten: once they are converted to MP3, you can post them to SoundCloud.