Show HN: ThumbFlow AI – Create viral YouTube thumbnails in seconds with AI
*How it started:* As a solo maker, I kept seeing creators struggling with thumbnail creation - either spending hours learning design tools or paying $50+ for each thumbnail from freelancers. Most existing AI tools produce mediocre results that don't actually drive clicks. I thought there had to be a better way to solve this.
*What makes ThumbFlow different?*
*4-in-1 AI toolkit in one chat interface:* - Text-to-Image: Just describe your scene, get a complete thumbnail - Background Transform: Upload any photo, AI changes the background while keeping the subject - Face Swap: Natural face replacement for brand consistency - Smart Edit: Use plain English like "make the text bolder" or "darker sky"
*Built for actual results:* Early users report 3x higher click-through rates compared to their previous thumbnails. One creator told me a thumbnail made in 30 seconds helped their video go viral.
*Transparent pricing:* Every operation costs exactly 5 credits. No hidden fees, no complex tiers based on features. New users get 20 free credits to try everything.
*Real usage scenarios:*
*YouTube Creators:* Stop spending hours in Photoshop or paying designers. Describe your hook → get a click-worthy thumbnail in seconds.
*Small Businesses:* Need product promo images? Upload your product photo, tell the AI to put it in any scene you want.
*Social Media Managers:* Maintain consistent branding across channels with face swap, then customize backgrounds for different platforms.
*Content Agencies:* Batch-create thumbnails for multiple clients without hiring a design team.
*How to use:* Super simple, just like chatting: 1. Sign up at https://thumbflow.io (20 free credits, no card needed) 2. Go to /create and either describe a scene or upload a photo 3. AI generates your thumbnail in ~15 seconds 4. Download or use smart edit to fine-tune
*Technical details for the curious:* - Built with Next.js 14 + Supabase + TypeScript - Uses state-of-the-art AI models optimized specifically for thumbnail generation - Real-time chat interface with session management - Integrated payment processing and credit system - All images stored securely with user ownership
*Try it here:* https://thumbflow.io/create
*Current status:* Fully launched with paying customers! The core functionality is solid, and I'm now working on features like template libraries and batch processing based on user feedback.
*Special offer for HN:* Use code RMZYR9OMPZ for 40% off your first 3 months if you decide to subscribe.
I'd love to hear your thoughts! What other AI-powered creative tools would be useful for content creators? Any technical questions about the implementation?
Thanks for checking it out!
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