Thumbnail Reality Check

Preview & score your YouTube thumbnail before you publish: real-size preview, competitor match rate, safe-zone check, on-device.

Test your YouTube thumbnail BEFORE you upload. ● Free features · Real-size preview (search results, home, tiny phone size) · Side-by-side with competitors (just paste a channel URL) · Text compare — see how differentiated your wording is (%) · Safe-zone check — keep text clear of the duration badge, with real-pixel sizing · Auto score — brightness, contrast, color, clutter, tiny-size readability (genre presets incl. Music/BGM) ● Pro (one-time purchase) · Competitor match rate % — know when you'd blend in before you publish · Auto text reading (OCR, English & Japanese) — fully on-device · Similarity % + metric-by-metric hints on how to close the gap with rivals 🔒 Privacy: your images and text recognition are processed entirely on your device. Network is used only to fetch thumbnails from YouTube URLs you paste, and to verify purchases (via Stripe — the developer never sees your card details).