What you get
Upload a thumbnail (title optional). We return explainable scores for legibility, contrast, focal point, hierarchy, clutter, emotion, and clarity.
Every score includes a why — so you can fix the cover, not just stare at a number.
Feed size matters
Most clicks are decided at mobile feed size (~168×94). Always review the small preview before you publish.
Limits
Free usage may be rate-limited. Logged-in plans raise or remove caps depending on your tier.