YouTube Thumbnail Size Guide
YouTube generates several thumbnail image files per video, at different resolutions. This guide covers every official size, when it’s actually available, and what dimensions to use if you’re designing your own.
Check a video’s available sizesAvailable YouTube thumbnail sizes
YouTube generates several thumbnail files per video, but not every size is available for every video — actual availability depends on the individual upload.
| Thumbnail type | Typical resolution | Aspect ratio | Recommended use |
|---|---|---|---|
| Maximum Resolution (maxresdefault) | 1280 × 720 | 16:9 | Blog posts, presentations, high-DPI displays, print-quality references. |
| Standard Definition (sddefault) | 640 × 480 | 4:3 | General previews when maximum resolution isn't available. |
| High Quality (hqdefault) | 480 × 360 | 4:3 | Reliable fallback available on almost every public video. |
| Medium Quality (mqdefault) | 320 × 180 | 16:9 | Lightweight previews, email, small embeds. |
| Default | 120 × 90 | 4:3 | Tiny thumbnails, icons, legacy layouts. |
Designing your own thumbnail?
If you’re uploading a custom thumbnail to your own video, YouTube’s requirements are specific: design at 1280 × 720 pixels (16:9), with a minimum width of 640px and a file size under 2MB. JPG, PNG, GIF (non-animated), and BMP are all accepted formats.
For more detail on choosing dimensions, safe margins, and file formats, see our Best YouTube Thumbnail Dimensions guide.
Related tools
YouTube Shorts Thumbnail Downloader
Grab the cover image from any YouTube Shorts link.
Open tool →Bulk YouTube Thumbnail Downloader
Look up and download thumbnails for up to 20 videos at once.
Open tool →Thumbnail Resizer
Resize a thumbnail to common social and ad dimensions, right in your browser.
Open tool →YouTube Thumbnail Size Guide
Every official thumbnail resolution and when it's actually available.
Open tool →Thumbnail size FAQ
What size should I design my own YouTube thumbnail?
1280 × 720 pixels at a 16:9 ratio, with a minimum width of 640px and a file size under 2MB, per YouTube’s own upload requirements.
Why do some downloaded thumbnails look smaller than 1280×720?
That resolution (maxresdefault) is only generated for videos uploaded at sufficient source quality. When it isn’t available, the largest real size you’ll get is 640×480.
Is 4:3 or 16:9 correct for a YouTube thumbnail?
16:9 matches the video player and is what YouTube recommends for uploads. Some auto-generated sizes (hqdefault, sddefault) happen to use a 4:3 canvas, but that’s a CDN detail, not a design recommendation.