Launching today

Thumbnail Labs

Launching today

Preview, score, and stress-test your YouTube thumbnail

1 follower

Preview, score, and stress-test your YouTube thumbnail

1 follower

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ThumbnailLabs lets YouTube creators preview their thumbnail in real feed, search, and mobile layouts before uploading. Compare it against live competitor thumbnails for any keyword, get an instant CTR score based on contrast, saturation, and face detection, and run stress tests like a squint-zoom and colorblindness filters. 100% free, no login, nothing leaves your browser.

Free

Launch tags:Design Tools•Marketing•YouTube

Launch Team

LightfieldAI-native CRM that builds itself and does work for you

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Maker

📌

I kept noticing the same gap: creators judge thumbnails in isolation — in Photoshop, in Canva — but that's never how a viewer actually sees them. A thumbnail that looks strong on its own can completely disappear once it's sitting next to nine other videos fighting for the same click in a real feed. I wanted to close that gap before upload, not after.

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1d ago