How to Make a YouTube Thumbnail the Right Size (1280×720)
A YouTube video thumbnail should be 16:9 (a wide rectangle) and at least 640 pixels wide. 1280 × 720 has long been the standard size, and it still works well. YouTube's Help page now recommends going larger, up to 3840 × 2160, and sets a file size limit of 2 MB when you upload from a phone.
To get an image into the right shape, open Image Crop, choose 16:9, drag the box over the part you want and download it as a JPEG. The rest of this guide covers the exact rules, how to keep the image sharp, and what to do if the file is too big.
The current rules from YouTube
According to YouTube Help's page on video thumbnails (checked October 2026), a custom thumbnail should:
| Rule | Videos | Shorts |
|---|
| Aspect ratio | 16:9 | 9:16 |
| Recommended resolution | 3840 × 2160 | 2160 × 3840 |
| Minimum | 640 pixels wide | 640 pixels tall |
| Formats | Image formats such as JPG or PNG |
| File size | 2 MB on mobile for video thumbnails; 50 MB on desktop |
YouTube also says your account must be verified to use custom thumbnails, and that Shorts thumbnails can currently be added only in YouTube Studio on a computer. These rules have changed before, so if an upload is rejected, check the Help page for the latest numbers.
So is 1280 × 720 still right?
Yes. 1280 × 720 is 16:9 and comfortably above the 640-pixel minimum, so YouTube accepts it. It's also a size that keeps file sizes small and is easy to design for. If your source image is big enough, a larger 16:9 thumbnail (such as 1920 × 1080 or 3840 × 2160) gives YouTube more detail to show on large screens. What matters most is the shape: get 16:9 right and the exact pixel size is flexible.
Quick definition: 16:9 means the width is 16 units for every 9 units of height. 1280 ÷ 16 = 80 and 720 ÷ 9 = 80, which is why 1280 × 720 is 16:9. So is 1920 × 1080, and so is 3840 × 2160.
Crop an image to 16:9
Most thumbnails start as a frame from the video, a photo, or a design exported from another app. If it isn't already 16:9, crop it:
- Open Image Crop and click the upload area. PNG, JPG, WebP and GIF all work.
- In the Ratio bar, click 16:9.
- Drag the crop box over the part of the image you want. Drag its corners to resize; it keeps the 16:9 shape.
- Scroll or pinch to zoom, or drag the picture under the box to reposition it.
- In Format, pick JPEG for a photo-style thumbnail, or PNG if it's mostly flat colours and text.
- Click Download Cropped Image. The file is saved with
-cropped added to its name.
The image is processed in your browser and isn't uploaded to our server.
Getting the pixel size you want
Image Crop sets the shape, not the pixel size. It keeps the real pixels inside your crop box, so the final width and height depend on how big the box is on the original image. There's no box for typing exact pixel sizes.
In practice that's fine for YouTube:
- If your crop comes out wider than 1280 pixels, you can upload it as it is. YouTube scales thumbnails to fit wherever they're shown. If you'd rather have a smaller image, Image Compress can resize it as well as shrink the file.
- If your crop comes out narrower than 640 pixels, it's too small for YouTube. Make the crop box bigger, or start from a larger image. Cropping can only remove pixels, so a tiny crop from a small image will look soft when it's stretched.
A common case: you grab a still from 1080p video, which is 1920 × 1080. That's already 16:9, so you don't need to crop at all unless you want to zoom in on a face.
Staying under the file size limit
If you upload from the YouTube app on your phone, video thumbnails must be 2 MB or smaller. A 1280 × 720 JPEG is usually well under that. Large PNGs, especially at 3840 × 2160, can go over.
If your file is too big:
- Save it as JPEG instead of PNG. Image Crop's JPEG output is saved at a high quality setting, and files are much smaller.
- Still too big? Run it through Image Compress to shrink the file or resize it to a smaller width.
- Or upload from a computer, where YouTube allows larger files.
Check that your final file is JPG or PNG. YouTube's page names those formats; if you saved a WebP, convert it to JPEG first.
Design tips that survive a small screen
- Keep important things away from the bottom right. YouTube shows the video length there, so text or a face in that corner can get covered.
- Use a few big words, not a sentence. Thumbnails are often seen at a fraction of their full size on phones.
- Make the subject stand out. A face or product cut out with Background Remover and placed on a bold colour reads clearly at small sizes.
- Check it small. Zoom out until the thumbnail is about the size of a phone's search result. If you can't tell what it is, simplify.
Making a Shorts thumbnail instead
Shorts use the opposite shape, 9:16. Image Crop doesn't have a 9:16 preset; its closest portrait option is 2:3, which isn't the same shape. For Shorts, use a design app with a 9:16 canvas, or your phone's editor if it offers a 9:16 crop.
For a regular video, crop to 16:9, keep it at least 640 pixels wide (1280 × 720 or larger is ideal), save as JPEG, and you're ready to upload.
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