AI Thumbnail Critic
A 0–100 score, a verdict across ten dimensions and up to three concrete fixes — judged at the tiny size where clicks are won or lost.
A 0–100 score, a verdict across ten dimensions and up to three concrete fixes — judged at the tiny size where clicks are won or lost.
Your thumbnail is judged the way viewers actually meet it: tiny, in a crowded feed, for a fraction of a second. The report scores seven visual dimensions — legibility, hierarchy, subject clarity, contrast, curiosity, distinctiveness and polish — and, when you add a title and description, three fit dimensions covering how well the thumbnail matches and reinforces them.
A 0–100 score with a plain-words band, the evidence behind every dimension, and up to three prioritized fixes — each one a concrete change with the effect you can expect, not generic advice. Run it again after editing to see the score move.
It's free: 2 critiques a day without an account, 10 a day signed in. When two thumbnails are active it can also compare them head-to-head, and any thumbnail here can be dropped into a real YouTube search-results preview.