toolsko

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YouTube Thumbnail Preview & Checker

See your thumbnail at the small sizes people see on phones, with the time label on it.

Tool inputs stay in your browser · optional AI search sends your query

Loading tool…

Good to know: Most people see thumbnails very small. If your text is not readable at the smallest size, make it bigger. Your files stay on your device: nothing is uploaded.

How to use it (step by step)

  1. 1Choose your thumbnail image.
  2. 2Look at the three small previews, which are the sizes people really see on phones.
  3. 3If your words are hard to read when small, make them bigger. Download the 1280×720 version if needed.

Words to know

Thumbnail
The small preview picture people see before they click a video.

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