Resize an image to standard YouTube thumbnail size.
YouTube thumbnails have a fixed 16:9 ratio - the same ratio as the video player itself - and this tool matches that exact requirement.
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Try Free Resume Builder Try Free Invoice BuilderYouTube displays thumbnails at various sizes across search results, suggested videos, and the watch page - all at the same 16:9 ratio just scaled differently. A thumbnail cropped to a different ratio gets distorted or cropped unpredictably across these placements.
YouTube caps custom thumbnails at 2MB - use the Reduce Size in KB tool if your file exceeds that after resizing.
Thumbnails don't have the same safe-area cropping issue as channel banners since they display at a consistent 16:9 ratio everywhere, but keep text large and readable since thumbnails often display small in search results.