3 items
Preview your Thumblr thumbnails directly on YouTube Thumblr Extension - Preview Your Thumbnails on YouTube See exactly how your thumbnails will look on YouTube before publishing. Thumblr lets you preview AI-generated thumbnails directly in the YouTube interface. HOW IT WORKS: 1. Generate thumbnails on thumblr.io 2. Open the extension on YouTube 3. Drag & drop thumbnails onto the YouTube homepage 4. See your thumbnail displayed as a real video card KEY FEATURES: • Realistic Preview - Your thumbnail appears as a native YouTube video card with title, channel name, views, and duration • Drag & Drop - Simply drag thumbnails from the extension and drop them anywhere on YouTube's video grid • Hide UI Mode - Toggle off the Thumblr badge to see exactly how your thumbnail looks without any overlay • Screenshot - Capture the YouTube page with your thumbnail inserted to share or compare designs • Seamless Integration - Works on YouTube homepage and subscription feeds REQUIREMENTS: - A Thumblr account (thumblr.io) - Generated thumbnails in your Thumblr library Perfect for YouTubers, content creators, and marketers who want to A/B test their thumbnail designs before publishing. Made with ❤️ by Thumblr
Dec 3, 2025
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.