Crop a YouTube thumbnail (16:9)

The thumbnail spec, and why it is strict

YouTube recommends 1280x720 pixels for thumbnails, a 16:9 ratio, with a minimum width of 640 pixels and a file under 2 MB. Crop to 16:9 here to nail the shape, then resize to 1280x720 and, if the file is heavy, compress it under 2 MB.

The ratio is not optional. A thumbnail that is not 16:9 gets letterboxed with black bars or cropped by YouTube, both of which look unprofessional next to thumbnails that fill the frame.

Frame for the small size

Most viewers see a thumbnail at a fraction of full size, in a sidebar or search row. Crop so the subject, usually a face or a clear object, is large in the frame. A wide establishing shot that looks fine full size becomes an unreadable blur at thumbnail scale.

Leave room for text. If you add a title overlay later, crop with space on one side so words do not fight the subject. Keep important detail away from the very bottom right, where the video duration badge sits.

Crop here, then size and compress

The workflow is three quick steps. Crop to 16:9 on this page to frame the subject, resize to 1280x720 for the exact thumbnail size, and compress to keep it under 2 MB if needed. Each step runs in your browser.

Because nothing is uploaded, an unreleased thumbnail for an unpublished video stays private on your device until you choose to post it.