AI Thumbnail Prompt Generator for Flow Labs & Nano Banana
Upload a reference image, add your video script, and get a production-ready AI image prompt in seconds — optimized for YouTube thumbnail generation in Flow Labs and Nano Banana.
AI-Powered Image Analysis
Our AI prompt generator analyzes composition, lighting, colors, and artistic style — then translates them into structured prompts for Flow Labs and Nano Banana.
Instant Prompt Generation
Generate YouTube thumbnail prompts in seconds. Structured style descriptions, core visuals, and technical settings — ready to paste directly into your AI image generator.
Save & Reuse Prompts
Your AI thumbnail prompt library is always a click away. Tag, search, export, and reuse your best prompts across every project.
Start Generating AI Thumbnail Prompts Free
Sign in to generate your first AI image prompt for Flow Labs or Nano Banana — no credit card required. New accounts start with 100 free Starter Credits.
How It Works
Upload Your Reference Image or Style Sheet
Choose any JPEG, PNG, or WebP image — a character photo, style reference, or thumbnail example — to anchor your AI prompt.
AI Analyzes Your Image & Script
The AI thumbnail prompt generator examines composition, lighting, color palette, and your video script to build a complete, context-aware prompt.
Get Your YouTube Thumbnail Prompt
Receive a detailed AI image prompt with style description, core visuals, and technical settings — ready to paste into Flow Labs or Nano Banana for instant thumbnail generation.