Thumbnail Analyzer — Score Your CTR
Get an AI-powered click-through rate score for any YouTube thumbnail. Detects faces, text, colors, composition, and emotional hooks. Free 3/day, no signup.
Your thumbnail scored 4.2/10. Fix it with AI.
Below-average thumbnails kill watch hours. ThumbnailDev generates 6 high-CTR variants from your video idea — trained on millions of thumbnails that actually convert.
GENERATE 6 AI ALTERNATIVES →What the analyzer measures
Face emotion
Detects expressions. Strong emotions (surprise, joy, anger) outperform neutral by 2-3x CTR.
Text readability
Font size, contrast, word count. Under 4 words is optimal for mobile thumbnails.
Color contrast
Distinct subject vs background. High contrast wins in YouTube's grid view.
Composition
Rule of thirds, focal point clarity, mobile-safe area utilization.
Pattern interrupt
Does it stand out vs typical thumbnails in this niche?
CTR prediction
Composite score 0-10 estimating relative click-through performance.
Analyze unlimited thumbnails?
Free account gets 100 analyses/month plus bulk channel-wide thumbnail scoring.
CREATE FREE ACCOUNT →FAQ
Q. How does the thumbnail analyzer work?
A. A computer vision model analyzes faces, text, color contrast, composition, and pattern interrupts. We then produce a CTR potential score from 0-10 based on patterns from high-performing thumbnails.
Q. What makes a good YouTube thumbnail?
A. High contrast, expressive faces (surprise/anger/joy outperform neutral), readable text under 4 words, distinct subject vs background, and a clear emotional hook that creates curiosity.
Q. Is the CTR score accurate?
A. It's a relative score, not an absolute prediction. A 7/10 thumbnail likely outperforms a 4/10 in the same niche, but actual CTR depends on title, audience, and YouTube's algorithm.
Q. Can I analyze a competitor's thumbnail?
A. Yes — paste any YouTube URL. This is a popular use case for studying what works in your niche.
Q. Can I upload my own image instead of a URL?
A. Yes — drag & drop or upload a JPG/PNG. Great for analyzing thumbnails before publishing.