YouTube Thumbnail Analyzer

Your thumbnail is turned into an image embedding and compared with the thumbnails in our index. We take the closest lookalikes that are at least a week old — past their launch week, so their numbers mean something — and check how each video did against its own channel’s usual views.

It compares how often your lookalikes broke out — 2x or more their channel’s usual views — with how often the lookalikes of other thumbnails across our index do. 50 is a typical thumbnail, most score between 20 and 85, and 85+ means thumbnails like yours break out more often than almost any. With fewer than 20 close lookalikes we don’t give a score at all.

No. Lookalikes share topic as much as style, so the score tells you how thumbnails like yours have performed — evidence to weigh, not a forecast. That’s why every result shows the lookalikes themselves: judge the pattern with your own eyes.

It measures how a video performed relative to its channel’s typical views. A 3x outlier pulled three times the views that channel normally gets — a strong sign the packaging and topic, not the channel’s size, drove the result.

No. The image is used to compute its embedding and is not saved. The analysis is cached for a week, keyed by the image’s fingerprint, so the same thumbnail gets the same answer instantly.

Yes — completely free, no account or credit card required. We only rate-limit rapid-fire requests to keep the tool fast for everyone.