Upload video. Select or drag&drop MP4 video to convert it to the AVI format from your computer, iPhone or Android. Moreover, it is possible to choose it from your Google Drive or Dropbox account. Step 2. ^{Online MP3 to MP4 conversion. In the harmonious orchestra of digital formats, every conversion tells a story. From the days of vinyl records to the digital age, music has flowed through our lives in ever-evolving formats. MP3, a name synonymous with music for decades, holds the melodies of countless memories.} O99F.