YouTube Thumbnail Size and Dimensions
The full spec for YouTube thumbnails: the upload size, the aspect ratio, the file limits, and every size you can download.
The YouTube thumbnail size is 1280x720 pixels at a 16:9 aspect ratio. That is the resolution YouTube recommends when you upload a custom thumbnail, and it is the size of the largest image file YouTube keeps for every video. This page lists the official upload requirements, the exact pixel size of each downloadable thumbnail, and the design rules that keep your thumbnail sharp on every screen. To pull the thumbnail from a video you already have a link for, use the YouTube thumbnail downloader.
Official YouTube thumbnail upload specs
These are the requirements YouTube applies when you set a custom thumbnail in YouTube Studio.
| Spec | Value |
|---|---|
| Recommended size | 1280 x 720 pixels |
| Minimum width | 640 pixels |
| Aspect ratio | 16:9 |
| Maximum file size | 2 MB |
| File formats | JPG, PNG, GIF |
Stay at 1280x720. It is the largest size YouTube displays, it satisfies the 16:9 ratio exactly, and a clean JPG at that resolution lands far under the 2 MB cap.
Every downloadable YouTube thumbnail size
Once a video is published, YouTube stores its thumbnail at several fixed sizes. These are the sizes you get back when you download a thumbnail rather than upload one.
| Name | Dimensions | Aspect | When it exists |
|---|---|---|---|
| Max resolution (HD) | 1280 x 720 | 16:9 | HD uploads and custom thumbnails |
| Standard definition | 640 x 480 | 4:3 (letterboxed) | Most videos |
| High quality | 480 x 360 | 4:3 (letterboxed) | Every video |
| Medium quality | 320 x 180 | 16:9 | Every video |
| Default | 120 x 90 | 4:3 | Every video |
The 4:3 files (480x360 and 640x480) pad the 16:9 image with black bars top and bottom. If you need a clean 16:9 crop that is guaranteed to exist, the 320x180 medium file is the safe choice. For the file names and code behind each of these, see the YouTube thumbnail URL guide.
Why 16:9 is the right aspect ratio
YouTube's player, search results, sidebar suggestions, and the channel page all render thumbnails in a 16:9 box. Upload anything else and YouTube crops or letterboxes it, which wastes pixels and can cut off text. A 1280x720 image is 16:9 to the pixel, so it fills the frame with no cropping. Other 16:9 sizes that scale cleanly are 1920x1080 and 1280x720; both downscale to YouTube's display size without artifacts, though 1280x720 is the documented target.
File size and format, in practice
The 2 MB ceiling is generous for a single 1280x720 image. A photo-heavy thumbnail saved as JPG at quality 80 is usually 150 to 400 KB. Choose the format by content:
- JPG for photographs, faces, and gradients. Smallest file, no transparency.
- PNG for sharp text, logos, and flat color. Larger file, but crisper edges.
- GIF is accepted but offers no real advantage for a static thumbnail.
If your design tool exports above 2 MB, compress the JPG or flatten the PNG before uploading.
Keep important parts inside the safe zone
YouTube overlays the video duration in the bottom-right corner of every thumbnail and, on some surfaces, layers UI on the edges. Keep faces, titles, and logos away from the bottom-right corner and a small margin around all four edges. Text should be large enough to read at roughly 210x118 pixels, the size a thumbnail shrinks to on a phone feed. Design at 1280x720, then check it small.
YouTube Shorts thumbnail size
Shorts are vertical. The frame viewers see in the Shorts feed is 9:16, about 1080 x 1920 pixels. The standard horizontal files (1280x720 and the rest) still exist for a Short and can be downloaded, but they crop the vertical image. To grab the true vertical frame, use the YouTube Shorts thumbnail downloader.
Frequently asked questions
What size is a YouTube thumbnail?
1280x720 pixels. That is the recommended upload resolution and the size of the full-resolution file YouTube stores for each video.
What is the aspect ratio of a YouTube thumbnail?
16:9, matching the video player. A 1280x720 image is exactly 16:9.
What is the maximum file size for a YouTube thumbnail?
2 MB. YouTube rejects custom thumbnail uploads above that limit.
What file format should a YouTube thumbnail be?
JPG, PNG, or GIF. Use JPG for photos and PNG for sharp text or flat color.
What is the minimum YouTube thumbnail size?
640 pixels wide is the floor YouTube accepts, but 1280x720 is the practical minimum for a sharp result on large screens.
What size is a YouTube Shorts thumbnail?
Vertical 9:16, around 1080x1920 pixels. See the Shorts thumbnail downloader.
Ready to pull a thumbnail at full size? Open the YouTube thumbnail grabber homepage or go straight to the downloader.