Free YouTube to MP3 and YouTube to MP4 online downloader and converter

Bookmarklet

Drag this button onto your Bookmarks toolbar: Converto.io DL

Click Converto.io DL while watching a video on YouTube to download it as MP3 or MP4

Alternative way to download from YouTube

While watching a video on YouTube:

Replace "youtube.com" with "converto.io" in the URL

Press Enter

Choose conversion format to convert YouTube video to MP3, MP4 or GIF