youtube-thumbnail-design

--- name: youtube-thumbnail-design description: "YouTube thumbnail design with specific dimensions, contrast rules, and mobile preview optimization. Covers safe zones, text placement, face expression psychology, and A/B testing. Use for: YouTube thumbnails, video cover images, click-through optimization. Triggers: youtube thumbnail, thumbnail design, video thumbnail, click through rate, ctr optimization, youtube cover, video cover image, thumbnail maker, thumbnail tips, youtube design, video preview image" allowed-tools: Bash(infsh *) --- # YouTube Thumbnail Design Create high-CTR YouTube thumbnails with AI image generation via [inference.sh](https://inference.sh) CLI. ## Quick Start > Requires inference.sh CLI (`infsh`). Get installation instructions: `npx skills add inference-sh/skills@agent-tools` ```bash infsh login # Generate a thumbnail infsh app run falai/flux-dev-lora --input '{ "prompt": "YouTube thumbnail style, close-up of a person with surprised excited expression looking at a glowing laptop screen, vibrant blue and orange color scheme, dramatic studio lighting, shallow depth of field, high contrast, cinematic", "width": 1280, "height": 720 }' ``` ## Specifications | Spec | Value | |------|-------| | Dimensions | 1280 x 720 px (minimum) | | Recommended | 1920 x 1080 px | | Aspect ratio | 16:9 | | Max file size | 2 MB | | Formats | JPG, GIF, PNG | ## The 120px Test Your thumbnail appears at roughly **120px wide** on mobile — that's how most viewers first see it. **At 120px, viewers must be able to identify:** 1. The mood/emotion (from colors and expression) 2. The general subject (from composition) 3. The text (if any — only if large enough) **Test:** view your thumbnail at 120px width. If it's a muddy blur, redesign. ## Safe Zones ``` ┌─────────────────────────────────────────────┐ │ │ │ ✅ SAFE FOR TEXT AND KEY ELEMENTS │ │ │ │ [... prompt truncated for preview ...]