Design Term

What is Thumbnail?

A small preview image that represents a video on YouTube.

Quick definitionUpdated dailyPart of the ThumbnailCreator glossary

Quick definition

A small preview image that represents a video on YouTube.

Definition

A thumbnail is a static image that serves as the preview or cover for a YouTube video. It appears in search results, recommendations, and on channel pages. Thumbnails are crucial for attracting clicks because they are often the first thing viewers see. YouTube allows custom thumbnails up to 2MB with a recommended resolution of 1280x720 pixels (16:9 aspect ratio).

Examples
  • 1A gaming video thumbnail showing an excited face and gameplay
  • 2A cooking tutorial with the finished dish prominently displayed
  • 3An educational video with bold text stating the topic
Pro Tips
  • Use high contrast colors to stand out
  • Include a human face when possible
  • Keep text to 3 words or fewer
  • Test different thumbnails to see what works

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