Automatically remove black bars from Youtube thumbnails and resize to 1280x720.
Youtube will automatically add black bars to the thumbnail if the image you upload is different than 1280x720 size. Read more about Youtube thumbnail size.
This site is an online application that will help you remove black bars and then resize thumbnail images according to the standard 16:9 ratio of Youtube.
Follow the steps below:
Note: only applies to thumbnails uploaded to Youtube.