Thumbnail Silhouette & Contrast Inspector
Test your YouTube video thumbnails for mobile readability, contrast, and visual silhouette clarity at small scale.
1. Thumbnail Upload
The Blind Test
If your thumbnail subject and text are not instantly clear under Mobile Blur or Grayscale, your CTR will drop on small mobile screens.
Thumbnail Inspector Viewport
Awaiting Upload
Upload a thumbnail image to begin visual inspection
Simulated Mobile Feed Size: