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Aadi-110i
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youtube-thumbnail-design

Generates YouTube thumbnails with AI image models following CTR, contrast, and safe-zone design rules.

Updated Jul 28, 2026
Search Tags:#design#image generation#youtube#thumbnail#ai image#video cover#ctr optimization
One-click install
npx skills add https://github.com/Aadi-110i/PEP-PROJECT --skill youtube-thumbnail-design-aadi-110i
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: youtube-thumbnail-design
Source: https://github.com/Aadi-110i/PEP-PROJECT/tree/main/skills/youtube-thumbnail-design
Command: npx skills add https://github.com/Aadi-110i/PEP-PROJECT --skill youtube-thumbnail-design-aadi-110i

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Creating YouTube thumbnails that attract clicks requires knowledge of dimensions, safe zones, color contrast, and expression psychology that most creators lack, leading to low click-through rates. ## Core Features & Use Cases - AI Thumbnail Generation: Generate 1280x720 or 1920x1080 thumbnails via the inference.sh CLI using models like falai/flux-dev-lora and bytedance/seedream-4-5. - Design Rule Guidance: Apply the 120px mobile test, safe zones avoiding timestamp and chapter overlays, high-contrast color pairs, and max-6-word text rules. - A/B Testing Support: Produce prompt variants differing in one variable (expression, background, text) to compare CTR performance. - Use Case: A creator launching a tutorial video generates a face-forward thumbnail with a curious expression and blue-orange contrast, then tests it against a no-text variant. ## Quick Start Ask the assistant to generate a YouTube thumbnail for your video topic using the belt CLI with a 1280x720 high-contrast composition.

Frequently Asked Questions about youtube-thumbnail-design

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I generate a YouTube thumbnail with AI?▼

Run the belt CLI command 'belt app run falai/flux-dev-lora' with a JSON input containing a descriptive prompt and width 1280, height 720. The inference.sh CLI must be installed and authenticated with 'belt login' first.

What size should a YouTube thumbnail be?▼

YouTube thumbnails should be at least 1280x720 pixels with a 16:9 aspect ratio, though 1920x1080 is recommended. The file must be under 2 MB in JPG, GIF, or PNG format.

How do I make a thumbnail readable on mobile devices?▼

Apply the 120px test: view the thumbnail at 120 pixels wide and confirm the mood, subject, and any text remain identifiable. Use bold sans-serif fonts, maximum six words, and high-contrast color pairs.

Which image generation models does this skill support?▼

The documented examples use falai/flux-dev-lora and bytedance/seedream-4-5 through the inference.sh belt CLI. You can browse additional available models with the 'belt app list' command.

Where should I avoid placing text on a YouTube thumbnail?▼

Avoid the bottom-right corner, which is covered by the video duration timestamp, and the bottom-left corner, which shows chapter markers and the progress bar. Extreme edges also risk cropping on different devices.

How do I A/B test YouTube thumbnail designs?▼

Generate two variants changing only one variable, such as background color or facial expression, using the same base prompt with the --no-wait flag. Compare their click-through rates to determine the better performer.

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