Thumblr - YouTube Thumbnail Preview

About

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