Thumbnail CTR Estimator
Score a thumbnail idea against five click-through factors and see where it is weak.
Heuristic Audit
- Add more contrast to make elements pop.
- Ensure any text is large and readable.
This estimator turns a gut feeling about a thumbnail into a structured score. You rate your thumbnail on five sliders — subject clarity, colour contrast, emotional pull, text readability, and how uncluttered it is — and it combines them into a single click-through score with the weakest factor called out. It is a self-assessment checklist, not a prediction from real view data, so treat the number as a prompt to improve, not a forecast.
The five factors, and why each one moves clicks
Each slider maps to something that genuinely affects whether a small image earns a tap at feed size: clarity (can you tell the subject in half a second?), contrast (does it pop against a white or dark app background?), emotion (a clear face or reaction out-pulls a flat object), text (three or four big words help; a sentence hurts), and focus (one clear idea beats a collage). Scoring them one at a time forces you to look at the thumbnail the way a scrolling viewer does.
What the score is — and is not
The result is a weighted blend of your own ratings, so it is only as honest as your input and it cannot know your title, your audience, or how the image looks shrunk down on a phone. Real click-through rate depends on all of that plus the thumbnail–title pairing. Use this to compare two of your own drafts and to find the one factor dragging a design down; then test the real thing with your audience. It is an estimate, not a guarantee of performance.
Frequently Asked Questions
Does this predict my real click-through rate?
No. It scores your own ratings of five design factors. It has no access to view data, your title or your audience, so it is a self-assessment aid, not a forecast.
What are the five factors?
Subject clarity, colour contrast, emotional pull, text readability, and visual focus (lack of clutter) — the design qualities that most affect whether a small thumbnail earns a tap.
How should I use the score?
To compare your own drafts and spot the weakest factor to fix. The tool flags the lowest-scoring area so you know where to focus before testing the thumbnail for real.
Is any data sent anywhere?
No. The scoring runs entirely in your browser from the slider values you set.