Upload your thumbnail
Drag and drop any PNG, JPG, or WEBP thumbnail. 16:9 format works best but any image is accepted.
Creator Tools
Thumbnail Color Analyzer
Upload any YouTube thumbnail and get an instant color analysis — brightness, contrast ratio, color temperature, saturation, and dominant colors. Plus actionable tips to make your thumbnails stand out in the feed.
4 key color metrics
Instantly see brightness (%), color contrast ratio, color temperature (warm/cool/neutral), and saturation (%).
Actionable tips
Get specific recommendations based on your thumbnail's scores to improve visibility and click-through rate.
Click or drag a thumbnail here
PNG, JPG, WEBP — 16:9 thumbnails work best
How to analyze a YouTube thumbnail
Step 1
Upload your thumbnail
Click or drag a PNG, JPG, or WEBP image. YouTube thumbnails (1280×720) work best.
Step 2
Review the metrics
See scores for brightness, color contrast, color temperature, and saturation alongside dominant color swatches.
Step 3
Apply the tips
Read the actionable tips panel to understand how to adjust your thumbnail for better performance.
FAQ
What metrics does this tool analyze?
Four metrics: Brightness (0–100%), Color Contrast (ratio between the brightest and darkest dominant colors), Color Temperature (warm/cool/neutral), and Saturation (0–100%). It also shows the 6 most dominant colors.
What is a good contrast ratio for a thumbnail?
A contrast ratio of 3:1 or higher between dominant light and dark colors means your thumbnail has enough variation for text overlays and visual separation.
Is my image uploaded to a server?
No. All analysis is done locally in your browser using the Canvas API. Your image is never sent anywhere.
What brightness is best for YouTube thumbnails?
Research suggests 35–75% overall brightness performs well — bright enough to stand out without being washed out. Very dark thumbnails can be harder to see on small screens.