Free creator tool

Thumbnail Concept Predictor

Pressure-test a thumbnail idea before producing it. The tool is deliberately honest about what a text-only heuristic can and cannot predict.

Thumbnail Concept Predictor

Heuristic

Test the written concept before creating the image. It checks scanability, duplication, specificity, focal intent and clutter risk—not future CTR.

Concept score

The result explains what to simplify or strengthen before you spend time producing the thumbnail.