Media.io online video editor allows you to create videos for almost all popular social media platforms with the aspect ratio presets. Adding captioins to video is a piece of cake.
1. Visit Media.io online video editor on your favorite website.
2. Tap Auto Subtitle, select a subtitle language and click Start to load an audio speech. This auto caption app will automatically recognize and add subtitles to the video.
3. Edit your subtitle tracks and choose an output aspect ratio for the video. Lastly, tap Export to save the video.