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Create YouTube thumbnails with 5 AI engines. Nano Banana Pro, GPT Image, Grok Imagine. Thumbnail Master — AI-Powered YouTube Thumbnail Generator Create stunning, click-worthy YouTube thumbnails in seconds with 5 powerful AI engines — all from your browser. 🎨 5 AI ENGINES • Nano Banana Pro — Google's premium image model with 4K outputs and precise text rendering • Nano Banana 2 — Lightning-fast generation, perfect for quick iterations • GPT Image 1.5 — OpenAI's photorealistic engine with excellent prompt following • GPT Image 2 — OpenAI's latest and most advanced image model • Grok Imagine — xAI's creative engine for bold, eye-catching visuals ⚡ KEY FEATURES • One-click thumbnail generation while browsing YouTube • 21 creative styles: Cyberpunk, Anime, Watercolor, Film Noir, Comic Book, and more • Reference image support — upload images to guide style and composition • Background processing — close the popup, your thumbnails keep generating • Desktop notifications when your thumbnails are ready • Generation history with instant downloads 🔧 HOW IT WORKS 1. Click the extension icon on any YouTube page 2. Enter your video title and pick a style 3. Choose your AI engine 4. Hit Generate — done in under 60 seconds 📎 REFERENCE IMAGES Upload 1-3 reference images to guide the AI. Match your channel's branding, replicate a composition you like, or set the color palette. 💬 NEED HELP? • Telegram Bot: @ProThumbnailBot • Website: thumbmaster.app Credits are shared across the extension, website, and Telegram bot. Buy credits directly from the Telegram bot using crypto. Start creating thumbnails that get clicks — install Thumbnail Master now.