Recommended YouTube Thumbnail Size
YouTube currently recommends 3840 x 2160 pixels at 16:9 for a standard video thumbnail. For a Short, it recommends 2160 x 3840 pixels at 9:16. The stated minimum is 640 pixels wide for standard videos and 640 pixels high for Shorts.
Quick Reference
Aspect Ratio: Why 16:9 Matters
YouTube recommends 16:9 for standard videos because it is widely used in its players and previews. Shorts use a different target: 9:16. Podcast playlists use 1:1.
Do not confuse the upload canvas with YouTube's downloadable image renditions. YouTube may expose an existing video's maxresdefault image at 1280 x 720 even though its current recommendation for a newly uploaded standard-video thumbnail is 3840 x 2160.
All YouTube Thumbnail Resolutions
YouTube exposes several standard image renditions for many videos. Availability varies by video; in particular, maxresdefault is not always present.
| Quality | Resolution | Use Case |
|---|---|---|
| maxresdefault | 1280 x 720 | HD preview, video player |
| sddefault | 640 x 480 | Standard embed previews |
| hqdefault | 480 x 360 | High quality thumbnails |
| mqdefault | 320 x 180 | Medium quality, search results |
| default | 120 x 90 | Small previews, suggestions |
Use our thumbnail downloader to check which of these renditions are available for a public YouTube video.
File Format and Size Limits
YouTube's current help page lists JPG and PNG. It gives device-specific limits for video thumbnails: 2 MB on mobile and 50 MB on desktop. JPG usually suits photographic artwork; PNG keeps hard graphic edges and text crisp.
Export within the limit shown by the upload flow you are using. If a file is too large, lower JPG quality gradually or optimize the PNG, then check that fine text and edges remain clean. See YouTube's official custom-thumbnail requirements for the latest values.
Mobile vs Desktop Display
A high-resolution upload will still be rendered at many smaller display sizes. Design so the focal subject and any text survive a compact feed preview rather than assuming viewers see the full canvas.
Keep optional text short and large, remove details that disappear when reduced, and inspect the thumbnail at several small widths before uploading. Also leave breathing room around important elements because interface treatments can vary by surface.
Custom Thumbnail Requirements
Your YouTube account must be verified to upload a custom thumbnail. Custom thumbnails must follow YouTube's Community Guidelines; rejected images and repeat violations can affect thumbnail privileges. Shorts custom thumbnails are currently uploaded through YouTube Studio on a computer.
Use our thumbnail downloader to inspect renditions from a video you own or are authorized to use, then follow the practical guide on how to make an original YouTube thumbnail.