There will always be a time when you need to add subtitles to your video, whether it's for ease of viewing, video professionality or for other purposes. Occasionally, you may want to quickly add video subtitles to share it in a timely manner on YouTube, Facebook, Instagram, etc. In that case, the online video subtitle adder is just what you expect. Now let's cut the crap and teach you how to add subtitles to video online as below. You can alternatively take a look at the offline solution if necessary.