Tools / Thumbnail Tester

YouTube Thumbnail Tester

Upload a thumbnail and a title — see how it looks in YouTube's actual interface.

Thumbnail image

Video title

Channel name

Views / date

Duration

YouTube theme

Upload a thumbnail to see the previews.

What to look for

Is the text still readable at small size — most views come from mobile.
Does the duration badge in the bottom-right corner cover text, a face or the main object.
Does it stand out next to neighbouring videos — contrast matters more than detail.
How it looks in YouTube's light theme: dark edges and grey text often get lost on a white background.

The image is processed entirely in your browser and is never uploaded anywhere.