Use this free 1280 x 720px template tool to resize a photo or image to the right size for a YouTube Thumbnail. YouTube recommends the dimensions 1280x720 px, but not all pictures come in at this size. With this free YouTube Thumbnail tool, you can fit or crop your media into the area for Facebook. You can also add text, insert stickers, change colors, and create a custom design to grab attention from viewers on YouTube. Publish to save your 1280 by 720 pixels JPG.