YouTube Thumbnail Rater
Upload your thumbnail and get an instant score across four key dimensions: contrast, face detection, text readability, and color pop. Plus AI-generated suggestions to improve your click-through rate.
Daily limit reached
Your free analyses reset at midnight UTC. In the meantime, use your latest score to generate a better thumbnail with ThumbMagic.
Free analyses reset at midnight UTC.
Overall Score
Upload a thumbnail to see your score
Breakdown
Suggestions
AI Tools
How it works
How to use the YouTube thumbnail rater
Upload a thumbnail and get scored across four visual dimensions in seconds. Add optional context for better suggestions.
Upload your thumbnails
Drag and drop or click to select a JPG, PNG, or WebP file up to 5 MB. A preview shows your file name, dimensions, and size so you can confirm the right image is loaded.
Add context (optional)
Enter your video title and target keyword to get more relevant AI suggestions. These fields are optional but improve the quality of the feedback you receive.
Click analyze
Hit the Analyze Thumbnail button to send your image for AI-powered scoring. Results appear within a few seconds.
Review your scores and suggestions
Check your overall score (0-100), see the breakdown across contrast, face detection, text readability, and color pop, and read the AI-generated suggestions for each weak area. Use the AI tools panel to generate a better thumbnail prompt or optimized title ideas based on your results.
FEATURES
What the thumbnail rater analyzes
Each upload is evaluated across four dimensions with AI-generated suggestions and tools to act on the results.
Four scoring dimensions
Each thumbnail is scored from 0 to 100 across contrast and clarity, face detection, text readability, and color pop. A weighted composite score gives you a single number to track improvement over time.
AI-generated suggestions
The rater doesn't stop at scores. It identifies your weakest dimension and generates specific, actionable suggestions: adjust contrast, crop tighter on the face, simplify your text overlay, or boost color saturation.
Thumbnail improvement prompt
After scoring, the AI tools panel generates a ready-to-use prompt based on your weak points. Paste it into ThumbMagic to generate a stronger thumbnail that addresses the exact issues the rater identified.
Title optimization
The rater also generates optimized title ideas based on your video title and keyword inputs. Pair a better thumbnail with a better title for maximum CTR impact.
Context-aware analysis
Adding your video title and target keyword lets the rater evaluate text relevance and keyword alignment alongside visual quality. The optional inputs improve suggestion quality without changing the scoring methodology.
10 free analyses per day
Analyze up to 10 thumbnails per day without creating an account. The limit resets at midnight UTC.
Why creators use this thumbnail rater
Measurable scores replace guesswork. Here's what creators get from analyzing thumbnails before publishing.
Get objective feedback
Asking friends or posting in forums gives you opinions. The rater gives you measurable scores across four dimensions so you know exactly where your thumbnail stands, not what one person thinks.
Find your weakest link
A thumbnail can score well on contrast but fail on text readability. The dimension breakdown pinpoints the specific area dragging your CTR down, so you fix the right thing instead of guessing.
Track improvement over time
Upload your revised thumbnail and compare the new scores against your previous attempt. The 0-100 scale makes progress concrete and measurable across iterations.
Frequently asked questions
How does the thumbnail rater work?
This thumbnail analyzer uses AI-powered image analysis to evaluate four key dimensions: contrast and clarity, face detection, text readability, and color pop. Each dimension is scored from 0 to 100, and a weighted composite score gives you an overall rating. The analysis examines how your thumbnail performs at the sizes YouTube actually displays it, from small sidebar thumbnails to full-width mobile cards.
What score should I aim for?
A composite score above 70 indicates strong thumbnail fundamentals. Scores between 40 and 70 suggest specific areas for improvement.
The most important thing isn't the absolute number but the breakdown. A thumbnail scoring 60 overall with weak text readability has a clear, actionable fix. Focus on bringing your lowest dimension up rather than optimizing an already-strong one.
Is my thumbnail uploaded to a server?
Yes, your thumbnail is sent to our analysis server for AI-powered scoring. The image is processed in memory and is not stored permanently. We do not share, sell, or retain your images beyond the analysis session.
How many thumbnails can I analyze per day?
Free users get 10 analyses per day, resetting at midnight UTC.
Does a higher score guarantee more clicks?
A higher score indicates your thumbnail follows visual best practices that correlate with higher CTR, but clicks depend on many factors including your title, topic, audience, and competition. Think of the score as a technical quality check. It ensures you're not leaving easy wins on the table, but compelling content and strategic positioning still matter.
Stop losing views to mediocre thumbnails
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