Thumbnail lab
Thumbnails built on what wins on your topic.
See which looks win, test yours in a YouTube-style feed, get an AI review, then make new thumbnails with AI.
On every plan, even Free
Sample Thumbnail lab screen with winning looks
What it does
From research to a finished thumbnail
Winning thumbnails
Thumbnails from videos that beat their usual views, next to ordinary ones.
Winning looks
The looks winners use more often, like faces, words and colors.
Search inside thumbnails
Find thumbnails by faces, expressions, objects, colors or text.
Test yours in a feed
See up to three options in home, search, up next and phone views, light and dark.
AI review
Six checks for each option, and the likely winner.
Quick checks
Size, shape, file size, brightness, contrast and color.
Make new ones
AI that designs from what wins
Three ideas from your title
Claude designs three thumbnails based on what wins on your topic.
Finished pictures
Turn an idea into a finished picture, with your own face if you like.
My pictures
Every picture you make is saved, ready to download.
Private by default
Your images stay on your device unless you ask for a review.
How it works
From a blank canvas to a tested thumbnail
- 1
Search
See the winning looks on your topic.
- 2
Make
Get three ideas and turn one into a finished picture.
- 3
Test
Compare it in a feed and get an AI review before you upload.
Questions
Thumbnail lab questions
Can AI make the whole thumbnail?
Yes. Turn any idea into a finished picture. Free includes 3 a month, and paid plans include more.
Are my images private?
Yes. They stay on your device unless you ask for an AI review.
Is this a real A/B test?
It's a preview and an AI review. To test with real viewers, use Test & compare in YouTube Studio after uploading.
Does it copy other creators' thumbnails?
No. It learns which looks win, then designs new thumbnails for your video.
Is it on the Free plan?
Yes. Every Cuetta tool is on every plan, including Free.