According to AlphaMoat, as of 2026-09, the Chrome extension Thumio has 137 users (+19.1% MoM), rated 5 (1 reviews) — ranked #3,737 of 9,324 AI browser extensions, and #197 of 425 in Image & Design.
What is Thumio
See what viewers are clicking. Edit any YouTube thumbnail with AI, right from your browser. Thumio brings AI-powered thumbnail analysis and editing directly to YouTube. Score any thumbnail with AI, see which thumbnails are getting the most clicks, preview your drafts on the real YouTube homepage, and edit any thumbnail in one click — no downloads, no separate apps.
AI Thumbnail Scores Score any thumbnail right on YouTube. Get an instant 0–100 Thumio Score with a breakdown across composition, clarity, emotion, and curiosity — plus concrete suggestions to improve it before you publish.
Click Multiplier Badges Every video on YouTube gets a real-time click multiplier badge showing how it performs compared to nearby videos. Spot outliers instantly — a 6.8x means that thumbnail is getting nearly 7 times more clicks than average.
AI Title Suggestions Writing titles in YouTube Studio? Get three AI-generated title variants for any video, built from your video's context — one click to copy.
CTR Insights in YouTube Studio See your click-through rates highlighted directly in your Studio content library, so you know exactly which thumbnails to remake first.
Feed Preview Test before you publish: swap your draft thumbnail into the real YouTube homepage grid and see how it competes against everything else in the feed.
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One-Click Thumbnail Editing See a thumbnail you want to improve? Click "Edit" on any YouTube video — or right-click any thumbnail — whether it's on the homepage, search results, watch page, or channel page, and jump straight into Thumio's AI editor.
YouTube Studio Integration Thumio adds an edit button directly into your YouTube Studio content library. Hover over any video row and click to start editing — no tab switching required.
AI-Powered Editor Generate, remix, and perfect thumbnails with AI. Use templates, swap backgrounds, add text, and publish — all from your browser.
Works Everywhere on YouTube
- Homepage and search results
- Watch pages
- Channel pages
- YouTube Studio content library
Get Started Free Install the extension, connect your free Thumio account, and start scoring and editing. It takes less than 30 seconds.
Privacy: no browsing history, watch history, or page contents are collected. Scoring and title suggestions only send the public video URL you explicitly choose. Full policy: https://thumio.com/privacy-policy
Support: Questions or feedback? Contact us at [email protected] Website: https://thumio.com
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+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.