Image ResizerYTScript

YouTube Thumbnail Size Resizer

Resize a still to 1280×720, 1920×1080, or 3840×2160 for a YouTube thumbnail.

Runs in your browser — images never leave your device

Drop images here or click to choose

JPG, PNG, or WebP. You can add more than one.

Resize by
Advanced options
When the photo doesn’t match the preset
No images yet

Choose a photo to resize it here. Download and ZIP stay on this screen, and stay disabled until a file is ready.

Need a file under a certain number of kilobytes? Use the image compressor.

How to resize an image

  1. 1

    Choose one or more JPG, PNG, or WebP files. They stay on this device.

  2. 2

    Pick a size: type pixels, use a percentage, or choose a social preset.

  3. 3

    Download one file, or pack the batch as a ZIP.

About this resizer

YouTube’s help article “Add custom thumbnails” (checked 2026-11-10) recommends 3840×2160, 16:9, with a minimum width of 640 pixels. 1280×720 is still widely used and works, but it is not the only official size. 1920×1080 is also available here.

You can export JPG or PNG. Desktop uploads allow a larger file than the mobile thumbnail limit (help pages list 50 MB on desktop and 2 MB for mobile video thumbnails). This page does not shrink a file to a kilobyte cap — use the image compressor for that.

This is not an official YouTube tool, and a correctly sized file is not a promise that YouTube will accept or feature the thumbnail. This page does not export Shorts video.

Questions

Is 1280×720 still valid?

Yes, it still works and is commonly searched, but YouTube’s current help recommends 3840×2160. Both are offered here.

Can you guarantee a 2 MB file?

No. This page changes pixel size only. To reduce kilobytes, use the image compressor.

Is this an official YouTube tool?

No. Sizes were checked against YouTube Help on 2026-11-10 and may change.