Thumby - Thumbnail Generator

Transform any YouTube video into a scroll-stopping hit with Thumby, the AI-powered thumbnail creation app. Just upload a photo of your face, describe the style and text you want, and Thumby generates a custom, click-optimized thumbnail—ready to post, no design skills needed.

Thumby’s face-focused AI engine analyzes your uploaded image and places it at the center of attention, automatically enhancing expression, lighting, and contrast to maximize engagement. Whether you’re creating content for gaming, vlogs, tech reviews, reaction videos, or lifestyle channels, Thumby adapts its design to match the tone, emotion, and genre of your video.

Choose from over 20 design presets tailored to trending YouTube styles, cinematic, clean and minimal, chaotic reaction, VHS retro, streamer-core, aesthetic, and more. Add your video title or hook text, and Thumby dynamically lays it out with bold, high-CTR design principles like large fonts, sharp outlines, 3D effects, and vibrant color palettes that stand out in any feed.

Need different formats? No problem. Thumby supports standard 16:9 YouTube thumbnails, vertical 9:16 for Shorts and TikTok, 4:5 for Instagram, and square 1:1 exports for universal use. Generate up to eight thumbnail variations at once, compare side-by-side, and pick the one that hits hardest.

Want a more dynamic look? Replace cluttered backgrounds with AI-generated scenes, vibrant textures, gradients, or abstract visuals to reinforce the video’s emotion—epic, funny, suspenseful, clean, or over-the-top. Thumby also gives you fine-tuned control over mood and lighting, so you can tweak warmth, saturation, glow, and facial highlights to fit your narrative perfectly.

Under the hood, Thumby uses multiple AI models tuned for thumbnail generation, each with its own speed and style. Select the one that fits your workflow and credit budget, track usage easily, and top up seamlessly with one-tap credit packs when needed. Every render is saved in your personal in-app gallery, where you can zoom, preview, download high-resolution files, or re-edit on the fly.

From subtle pulse animations during render to haptic feedback that lets you feel the AI working, Thumby delivers a smooth creative experience that’s optimized for performance—both in your hands and in the YouTube algorithm.

Here’s how it works: upload a photo of yourself or your subject, describe your thumbnail style and text, pick your content niche and mood, choose your output size and number of versions, select a model, and tap generate. In seconds, you’ll have a studio-quality thumbnail ready to go live. Iterate as much as you want until it’s perfect.

Thumby is made for creators who want results without wasting time. Whether you're an aspiring YouTuber, an experienced editor managing multiple channels, a Shorts creator pushing daily uploads, or a streamer building your brand—Thumby gives you a faster way to get pro thumbnails that drive more clicks.

Thumby operates on a flexible credit system. Each generation costs a few credits depending on the AI model you choose. Buy credits through one-time packs or opt into auto-renewing plans. Pricing is clear, upfront, and built for creators who scale. All you need is an internet connection to generate, preview, and download your thumbnails. Your results are AI-generated and optimized for engagement—but always review before publishing for best results.

Download Thumby today and start making high-performance thumbnails that turn impressions into views. Powered by AI, designed by you.

TERMS: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/