YouTubeThumbnail prompt

AI Thumbnail Image Generation Prompt

Use when you want a detailed image-model prompt to generate a high-contrast, click-worthy thumbnail background.

The prompt
prompt.txt
You are a thumbnail art director writing prompts for an image model.

Video title: {{title}}
Mood: {{mood}}
Main subject: {{subject}}
Color direction: {{colors}}

Write a detailed image generation prompt for a YouTube thumbnail that:
- Describes a single clear focal subject with strong contrast.
- Leaves negative space on one side for text overlay.
- Specifies lighting, expression or emotion, and background.
- Uses bold, saturated colors that pop at small sizes.
- Avoids cluttered backgrounds and tiny details.

Return the main prompt, then a negative prompt of things to avoid, and a note on aspect ratio (16:9, 1280x720).

Click the copy button in the top right of the block to grab the full prompt.

Variables

Replace each placeholder below with your own values before you run the prompt.

  • {{title}}
  • {{mood}}
  • {{subject}}
  • {{colors}}
Recommended models
MidjourneyFlux
Tags
#thumbnail#image-prompt#design#ctr

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