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Demo feed — titles and stats are mocked. Your test thumbnail uses a highlighted ring.

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Watch on YouTube

Click the image to open the full URL in a new tab (easy to save or download).

How this tester works

This preview simulates a YouTube home grid so you can see your thumbnail next to similar videos — not a guarantee of real placement.

  • Your images stay in this browser; we don’t store them on our servers.
  • Competitors come from a public YouTube search for the topic you enter (plus any videos you add by URL).
  • Use ← → (or arrow keys) to switch thumbnail variants while keeping your card in the same place; use Randomize layout to shuffle the grid. Toggle Highlight my thumbnail to see your card with or without emphasis.
  • Start over clears the in-browser session (and optional server session if you use that control).