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Free Tool

YouTube Thumbnail Prompt Generator

Get optimized AI image prompts for your YouTube thumbnail for Midjourney, DALL·E 3, and Stable Diffusion. Free, no sign-up required.

Include your video title or main hook for the best prompt

Great thumbnail? Now make the Short.

Paste Youtube video URL, ShortPurify cuts your long video into viral short clips, adds captions, and publishes directly to YouTube Shorts in minutes.

No credit card required · Free plan available

How to create the perfect YouTube thumbnail with AI

A great YouTube thumbnail is responsible for up to 90% of your click-through rate. AI image generators like Midjourney and DALL·E 3 can create professional thumbnails in seconds but only if you give them the right prompt.

What makes a high-CTR YouTube thumbnail?

  • Bold contrast use colors that pop against YouTube's white background (red, yellow, bright blue)
  • Expressive face thumbnails with a surprised or excited face get significantly more clicks
  • Minimal text 3-4 words maximum, large enough to read on mobile
  • Clear focal point one main subject, no clutter
  • 16:9 ratio always design at 1280×720 pixels

Midjourney vs DALL·E 3 for YouTube thumbnails

Midjourney produces more cinematic, stylized results and handles lighting exceptionally well. DALL·E 3 (via ChatGPT) is better at following detailed text instructions and is more accessible without a subscription. Stable Diffusion gives you the most control via tools like ComfyUI, and Leonardo.ai offers a free tier with good quality.

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