Stop guessing
which thumbnail
actually wins.
Upload 2–4 thumbnail variants. Claude Vision scores them on click appeal, emotion, contrast, readability, and face prominence in under thirty seconds. You publish the winner with conviction.
3 free tests / month · Up to 4 variants per test · Powered by Claude Sonnet 4
What it does
Five dimensions.
One winner.
Claude Vision Scoring
Sonnet 4 analyzes each thumbnail across five dimensions that actually predict clicks: click appeal, emotion strength, contrast, text readability, and face prominence.
Side-by-Side Verdict
Upload 2–4 variants. The winner gets a gold badge. Every losing dimension gets a specific, actionable suggestion — not vague advice.
Predicted CTR
Each thumbnail receives a predicted click-through rate based on composition patterns from top-performing YouTube videos. Sanity check before you publish.
Free Tier That Works
Three full tests per month, free, no card. Use it for a real upload before deciding if Pro is worth $19/mo.
Pricing
Start free. Upgrade
when thumbnails pay for themselves.
Free
Try it before you buy it
$0/mo
- 3 thumbnail tests per month
- Up to 2 variants per test
- AI vision scoring
- Basic suggestions
Pro
For serious creators
$19/mo
- Unlimited thumbnail tests
- Up to 4 variants per test
- AI vision scoring
- Actionable improvement tips
- Test history library
- CTR predictions
- Email support
Agency
For teams & agencies
$79/mo
- Everything in Pro
- 5 team members
- Bulk testing (up to 12 variants)
- API access
- White-label PDF reports
- Priority support
Your next thumbnail
deserves better than a coin flip.
Free tier is fully functional. Try it on your next upload.