Thumblr - YouTube Thumbnail Preview

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