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See your thumbnail the way viewers will: small, in a crowded feed, next to competitors. Upload it, add your title, and check every surface before you publish.
24/100
Upload a thumbnail to see it in the home feed
Stays on your device — nothing is uploaded to a server.
You design at 1280×720 — but YouTube shows your thumbnail at roughly 360 pixels in the home feed, 168 pixels in the suggested sidebar, and even smaller on end screens. Most thumbnails that fail don't fail because the design is bad at full size; they fail because the text becomes unreadable or the focal point vanishes once the image is shrunk and surrounded by competition. Testing at real feed sizes catches that before your first hour of impressions does. (For the full spec breakdown, see the YouTube thumbnail size guide.)
The checklist that matters: text readable at suggested size, one clear focal point in the grayscale check, and a design that draws the eye when it sits in a row of other videos. If your thumbnail fails any of these, fix it before publishing — or generate stronger variations with VisualKit and bring them back here to compare.
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Generate stronger options from the same video idea, then bring them back here and watch them win the comparison.
