YouTube Thumbnail Silhouette & Contrast Checker
Test your video thumbnails in grayscale silhouette mode and micro mobile dimensions before publishing to maximize CTR.
1. Thumbnail Artwork Setup
Grayscale Silhouette Mode
High Contrast Boost
Silhouette Rule
If your subject disappears into the background in grayscale mode, mobile viewers scrolling quickly will skip your video.
Full-Size Diagnostic Preview
Ready for Testing
Upload a 16:9 thumbnail artwork to begin testing
Mobile Feed Scaling Test (Tiny Viewport)
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