YouTube Thumbnail Resizer
Everything happens in your browser: the image is never uploaded. Output is exactly 1280x720 (or 1080x1920 for Shorts) and JPGs are compressed automatically until they are under YouTube's 2 MB limit.
Everything happens in your browser: the image is never uploaded. Output is exactly 1280x720 (or 1080x1920 for Shorts) and JPGs are compressed automatically until they are under YouTube's 2 MB limit.
YouTube Studio only accepts a custom thumbnail that is the right shape and under the size cap. This resizer takes any image you already have, a Canva export, a phone photo, a screenshot, a 4K render, and turns it into a 1280x720, 16:9 thumbnail under 2 MB in one click. It also handles the vertical 1080x1920 frame for Shorts. Nothing is uploaded; the resize and compression run on the HTML canvas inside your browser.
| Requirement | Regular video | Shorts |
|---|---|---|
| Resolution | 1280x720 recommended, at least 640 pixels wide | 1080x1920 (vertical, full frame) |
| Aspect ratio | 16:9 | 9:16 |
| File size | Under 2 MB | Under 2 MB |
| Format | JPG, PNG, or GIF | JPG, PNG, or GIF |
Two of those rules cause nearly every upload failure: an image that is not 16:9, which YouTube will crop or letterbox on its own, and a file over 2 MB, which YouTube rejects outright. The resizer fixes both at once. For the full spec and how each size is displayed, see the YouTube thumbnail size guide.
Most designs should use crop to fill. A 4:3 photo or a square Instagram graphic becomes a clean 16:9 frame with the edges trimmed, and the subject stays sharp and full-size. The resizer always crops from the center, so keep your subject and text away from the outer edges of the source image if it is not already 16:9. The safe zone guide shows exactly how much margin to leave.
Fit with padding is the right choice when nothing can be cut, for example a slide, a poster, or a product shot with text that runs to the edge. The whole image is scaled to fit inside 1280x720 and the empty bands are filled with your padding color. Bars look deliberate when the color matches your brand or the image background; pure black is the safe default.
Neither mode stretches the image. Squashing a 4:3 image into 16:9 is what makes thumbnails look warped, and this tool never does it. If your image is already 16:9, both modes produce the same result with no cropping at all. To check a source's shape first, see the aspect ratio guide.
Oversized files come from two things: too many pixels and the wrong format. The resizer removes the first problem by scaling to 1280x720, which is the largest size YouTube stores, so any pixels beyond that are wasted. A 3840x2160 export has nine times as many pixels as it needs. Then it exports a JPG starting at quality 92 and, if the result is still over 2 MB, re-encodes at 85, 80, 75, and so on until it clears the limit. In practice a 1280x720 JPG lands between 150 KB and 400 KB on the first pass, and the quality steps are only needed for unusually noisy images.
PNG is lossless, so the tool cannot compress it by lowering quality. If a PNG export is over 2 MB, the stats line turns red and the fix is to switch the format to JPG. For a deeper look at why files balloon and how to fix it in Canva, Photoshop, or GIMP, read YouTube thumbnail too large.
Pasting a YouTube link loads that video's highest-resolution thumbnail, normally the 1280x720 maxresdefault.jpg, straight into the resizer. That is handy for turning a 16:9 thumbnail into a vertical 1080x1920 Shorts cover, or for padding an older 480x360 hqdefault into a clean 16:9 frame. If a video only has the 480x360 file, the output is still 1280x720 but it will look soft, because upscaling cannot add detail; the blurry thumbnail guide explains why. To save the original image at every size instead, use the YouTube thumbnail grabber homepage or the HD thumbnail downloader. Reusing someone else's thumbnail on your own video is a rights question, covered in the thumbnail copyright guide.
1280x720 pixels, a 16:9 aspect ratio, with a minimum width of 640 pixels. YouTube also requires the file to be under 2 MB and in JPG, PNG, or GIF format. For Shorts, use a vertical 1080x1920 (9:16) image.
No. The resize, crop, and compression all run inside your browser using the HTML canvas. Your image never leaves your device, and there is nothing to sign up for.
It scales the image to 1280x720 first, which removes the wasted pixels that cause most oversized files, then exports a JPG and steps the quality down from 92 until the result is under 2 MB. A 1280x720 JPG is normally 150 to 400 KB, so the first pass usually clears the limit.
Crop to fill scales the image until it covers the whole 16:9 frame and trims whatever overflows the edges, so nothing is distorted and there are no bars. Fit with padding scales the whole image inside the frame and fills the leftover space with a solid color, so nothing is cut off. Neither mode stretches the image.
Yes. Switch the preset to 1080x1920 (9:16). That is the vertical full-frame size Shorts use, and the same crop or fit modes apply. To download an existing Shorts thumbnail first, use the Shorts thumbnail downloader.
No. Enlarging adds pixels but not detail, so a 640x360 source scaled to 1280x720 will look soft. For a sharp thumbnail start from an image that is at least 1280 pixels wide. If you only have a small file, the resizer still outputs the correct 1280x720 frame, it just cannot invent detail.
JPG for almost every thumbnail. It keeps photo-heavy designs small and well under 2 MB. Use PNG only for flat-color graphics or sharp text that JPG would soften; if a 1280x720 PNG is over 2 MB the tool will warn you, and switching to JPG fixes it.