Thumbnail A/B Predictor
Upload 2-3 thumbnail options and let AI predict which one will get the most clicks. Get detailed analysis of composition, readability, and emotional impact for each option.
Results
Improvement Tips
FAQ
How does this thumbnail A/B test work?
Upload 2 or 3 thumbnail options and the AI scores each on the things that drive clicks: contrast, a clear focal point, text readability at small sizes, facial emotion, and how it reads on a phone. It predicts which one is most likely to win and explains why.
Is this a real A/B test?
No. A true A/B test needs live traffic, which only YouTube can run after you publish. This is a pre-publish prediction so you can pick your strongest option before you upload, not a guarantee of real-world click-through rate.
What makes a thumbnail score well?
High contrast, one clear focal point, large readable text (3 to 5 words), a visible expressive face when relevant, and an image that still makes sense shrunk to mobile size. The tool flags which of these each thumbnail is missing.
How many comparisons can I run per day?
Up to 5 per day on the free tier, no signup needed. ChannelGrade's paid plans remove the daily cap and grade the thumbnail on every video you publish automatically.
Should I always pick the highest-scored thumbnail?
Use it as strong guidance, not gospel. Nobody can know your real audience response before publishing. Treat the score as a tie-breaker and a checklist of fixes, then trust what you know about your own viewers.