FeedFlix: YouTube Thumbnail & CTR Sandbox

Preview, compare, and stress-test custom thumbnails and titles directly in your live YouTube feed.

Tired of guessing which thumbnail will get more clicks? Meet FeedFlix! FeedFlix is a powerful, lightweight, offline-first Chrome Extension designed specifically for YouTubers, video editors, and content creators. It allows you to preview and stress-test your custom thumbnails and titles directly inside your LIVE, personalized YouTube homepage and search feeds before you publish! Stop relying on static mockup tools. Test your designs in context, next to your actual competitors, and optimize your Click-Through Rate (CTR) instantly. 🚀 CORE FEATURES: - Live Feed Swapping: Swap the thumbnail, title, channel name, avatar, and metrics of any video on your YouTube feed with a single click. - Persistent Mockups: Our dynamic Swap Engine uses MutationObserver to ensure your mockup stays active even as you scroll infinitely. - Smart Fill: Select any video card on YouTube, and FeedFlix will automatically pull its metadata, letting you replace it seamlessly. - Client-Side Compression: Automatic image compression guarantees fast rendering and zero memory leaks. - 100% Private & Secure: Your drafts are processed entirely on your browser. We never upload your images to any external servers. 💎 PRO FEATURES (Unlock in one click): - Squint Test (Blur Filter): Blur the feed to test if your thumbnail's focal points and contrast stand out when users scan quickly. - Value Contrast (Grayscale Filter): Strip away colors to check the raw brightness contrast and visual hierarchy of your design. - Mobile Simulator: Shrink the YouTube feed to a realistic 480px mobile viewport with a sleek mockup frame to preview mobile rendering (70%+ of YouTube traffic). - Unlimited Presets: Save, load, and manage unlimited drafts (Free tier limited to 1) to compare multiple visual options. - Multi-Thumbnail Carousel: Upload multiple draft thumbnails and quick-swap them on the fly to see which stands out best (Free tier limited to 1 image upload). How it works: 1. Open YouTube. 2. Open the FeedFlix Side Panel by clicking our purple extension icon. 3. Upload your thumbnail draft and enter your title. 4. Click "Select Video Target" and click any video on the page to target it. 5. Hit "Inject Mockup into Feed" and evaluate your design in real context! 6. Click "Reset Feed" to restore YouTube back to original instantly. Take control of your YouTube CTR. Download FeedFlix today and make data-driven thumbnail decisions!