YouTube Thumbnail Resizer & Preview
Size any picture into a perfect YouTube thumbnail and see how it looks before you upload.
Private: your files never leave your device.
How it works
- Choose your files.
- Adjust the settings if you like.
- Download the result, or send it to another device with BroAllDone.
Frequently asked questions
What size should a YouTube thumbnail be?
1280 × 720 pixels (16:9), as a JPG, PNG or GIF under 2 MB. This tool makes exactly that from any picture, and can also make 1920 × 1080.
How do I keep my thumbnail under 2 MB?
Save it as JPG: the tool picks the highest quality that stays under YouTube's 2 MB limit and tells you the file size.
Can I see how my thumbnail looks before uploading?
Yes. The preview shows it on the home page, in search results, next to another video and on a phone, in light and dark mode, with your title and channel name.
Why is one corner of the thumbnail marked?
YouTube shows the video length in the bottom-right corner. Keep faces and text out of that corner so nothing important is covered.
Can I compare my thumbnail with others?
Yes. Add up to 3 other thumbnails and they appear next to yours in the previews, so you can see which one stands out.
Are my pictures uploaded?
No. Everything happens in your browser; your pictures never leave your device.
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