Design a high-CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed.

YouTube Thumbnail Design a high CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed. Inputs Name Type Required Default Description : : : : : title text yes — The video title or topic (e.g. "I tried 7 AI tools in 24 hours — here's what happened"). channel style text no bold, high contrast, bright colors, clean design, YouTube tech aesthetic Channel brand style (e.g. "dark moody gaming", "bright educational", "minimal corporate"). subject description text no — Optional description of the person or subject to feature (e.g. "a surprised young man in a hoodie"). Steps Thumbnails are the 1 factor in YouTube CTR. Generate a single, maximum impact 16:9 image. Phase A — Plan the composition Before generating, briefly reason about the best thumbnail formula for this topic: Emotion first : shocked/curious face if relevant + bold text = high CTR Text overlay : 3–5 words max, high contrast (white/yellow on dark, or vice versa) Contrast & saturation : thumbnails compete in a grid — they must pop Phase B — Generate the thumbnail 1. Build the image generation prompt: Subject: {{subject description}} if provided, otherwise design an object/scene that dramatizes the topic. Mood: derives from {{channel style}} . Composition: rule of thirds, subject on left or right with empty space for text. Style tags: {{channel style}}, youtube thumbnail composition, ultra detailed, vibrant, high contrast, 16:9 . 2. Call muapi image generate (model=gpt image 2 text to image, aspect ratio=16:9). Phase C — Text overlay guidance After generation, return: Suggested overlay text : 3–5 bold words that complement the title {{title}} . Text placement : where on the canvas to position text (e.g. "bold yellow text, top right third"). Font recommendation : style suggestion (e.g. "Impact style all caps with black outline"). Notes Never put too much text in the prompt — text rendering in image models is unreliable. Guide the user on adding text in post production (Canva, Photoshop). If the user already has a channel image or face photo in the session, use muapi image edit to incorporate it. Suggest A/B variants only if the user asks. Trigger Keywords youtube thumbnail , yt thumbnail , thumbnail , video thumbnail , youtube cover Notes for the Executing Agent This recipe is LLM orchestrated: read each phase, gather any missing inputs from the user, then call muapi CLI commands. Use muapi auth configure first if MUAPI API KEY is unset. For model IDs without a CLI alias yet, fall back to the raw endpoint via curl X POST https://api.muapi.ai/api/v1/<endpoint H "x api key: $MUAPI API KEY" H 'content type: application/json' d '{...}' and poll with muapi predict wait <request id . Substitute {{input name}} placeholders with the user's actual inputs before issuing each call.

muapi-youtube-thumbnail