Thumbnail Tools Preview Tool Blind Test

Thumbnail Preview Tool

Upload a thumbnail and see how it reads across every placement where viewers actually encounter it, on phone, TV, and computer, before you publish.

thumbnail preview
1280×720 recommended · JPG/PNG
Using generated test thumbnail, upload your own anytime

Compare against other thumbnails

Drop in 2–4 of your own recent uploads or competitor thumbnails to check contrast and click-worthiness side by side, as they'd sit in a real feed.

Notes: renders are approximations of YouTube's real UI for layout/legibility testing, not pixel-exact reproductions. Shorts and notification crops take the center of your source image, if a face or key text sits off-center, reposition it in the source before re-uploading. Legibility warning triggers when the sidebar-size render (168×94px) is judged likely too small to read comfortably.