The idea
ThumbnailTools helps you choose the YouTube thumbnail (and title) that earns the click - with evidence, not gut feel.
We are not a generic image editor. We focus on validation: diagnose, compare, and run live A/B tests.
Three layers
Layer 0 - Instant Score*: Diagnose several covers at feed size and pick a winner. Not a live view test.
Layer 1 - Preference: rank variants in a realistic feed context (human or synthetic panels).
Layer 2 - Live AI Test: automated rotation on your channel with smart traffic allocation.
Next steps
Run a free AI Test from the homepage without an account.
Connect Google when you are ready to save projects and unlock live testing on higher plans.