ImageFlowMake YouTube Thumbnail
Prepare a 3840 × 2160 16:9 custom video thumbnail.
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Before you start
YouTube thumbnail size and crop
- YouTube recommends 3840 × 2160 and a 16:9 ratio for custom video thumbnails.
- Fill and crop removes edge content from images that are not 16:9. Fit with padding keeps the complete source.
- The preset starts with JPEG at 90% quality and does not target a file-size limit.
Source: YouTube custom thumbnail requirements. Reviewed .