Version A
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Side-by-side comparison
YouTube Thumbnail A/B Test: Which Thumbnail Earns the Click?
Upload two versions, compare their visual impact, then place each one among surrounding videos.
Version B
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JPG, PNG, or WebP
Video details
These details are shown with both versions in the feeds.
Surrounding video context
See both versions in the feed
Compare how each thumbnail competes for attention around the same videos.
Version A feed
M
I Tried The World's Biggest Burger
Max Makes3.5M
Your Thumbnail
Y
Your next video title
Your Channel0
L
I Bought The Weirdest Phones Ever
Luminous Tech4.2M
C
What's Inside This Mystery Box?
Challenge Lab8.1M
P
This Game Got Absolutely Wild
Play Daily1.9M
M
I Built The Most Powerful Gadget
Make Things2.7M
Version B feed
M
I Tried The World's Biggest Burger
Max Makes3.5M
L
I Bought The Weirdest Phones Ever
Luminous Tech4.2M
C
What's Inside This Mystery Box?
Challenge Lab8.1M
Your Thumbnail
Y
Your next video title
Your Channel0
P
This Game Got Absolutely Wild
Play Daily1.9M
M
I Built The Most Powerful Gadget
Make Things2.7M
Compare YouTube thumbnails before you publish
A strong YouTube thumbnail needs to work beside other videos, not only at full size. MyThumbnail’s free A/B comparison tool lets you review two thumbnail variations side by side and inside realistic feed simulations. Look for the version with the clearest subject, strongest contrast, and most readable message at a glance.
Private browser-based testing
Your thumbnail files stay in this browser through local previews and are not uploaded to MyThumbnail storage.
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