youtube-thumbnail

Generate YouTube thumbnails with Thumbkit and Gemini image models.

127|31|Updated Nov 20, 2025

Search Tags:#design #youtube #visuals #AI image generation #Thumbkit #thumbnail #click-through rate

Ready to run

npx skills add https://github.com/kenneth-liao/ai-launchpad-marketplace --skill youtube-thumbnail

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: youtube-thumbnail
Source: https://github.com/kenneth-liao/ai-launchpad-marketplace/tree/main/yt-content-strategist/skills/youtube-thumbnail
Command: npx skills add https://github.com/kenneth-liao/ai-launchpad-marketplace --skill youtube-thumbnail

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires thumbkit, and includes references (resource) components.

What problem does it solve?

This Skill solves the critical challenge of creating high-performing YouTube thumbnails that capture viewer attention and drive click-through rates (CTR). It ensures your video stands out in crowded feeds, compelling users to click and watch.

Core Features & Use Cases

CTR Optimization: Generates and refines thumbnails using proven design strategies to maximize clicks.
AI-Powered Design: Leverages Gemini image models (NanoBanana) via the Thumbkit CLI tool for efficient generation and editing.
Mandatory Design Principles: Integrates critical requirements like the Glance Test, sparking curiosity, single clear focal points, and mobile-first design.
Use Case: Create a compelling thumbnail for a video titled "5 Python Tricks You Didn't Know" that features a surprising visual element and minimal, impactful text, optimized for mobile viewing.

Quick Start

Create a YouTube thumbnail for my video titled 'The Secret to Viral AI Content' with a visually striking image and text that sparks curiosity.

Frequently Asked Questions about youtube-thumbnail

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

FAQPage Schema

How do I create a YouTube thumbnail optimized for click-through rate?▼

Generate YouTube thumbnails optimized for CTR using Thumbkit via the Thumbnail Designer subagent. The Skill applies proven design strategies—glance test, focal points, mobile-first layout, and curiosity-sparking elements—to maximize clicks on your video in crowded feeds.

What design principles should I follow for high-performing YouTube thumbnails?▼

High-performing thumbnails require a single clear focal point, mobile-first design, minimal impactful text, and elements that spark curiosity. The Skill enforces these mandatory design principles alongside AI-powered generation to ensure your thumbnail captures viewer attention.

Can I use reference images and style transfer when designing thumbnails with Thumbkit?▼

Yes. Thumbkit supports incorporating reference assets, style transfer, and logo placement. The Skill requires absolute-path reference images and integrates them into the generation workflow through the Thumbnail Designer, enabling design consistency across your video library.

Do I need to install Thumbkit separately to use this Skill?▼

Yes, Thumbkit must be installed as a uv tool with absolute-path reference image configuration before using this Skill. The Skill provides installation and upgrade steps, and enforces a single review pass with the Thumbnail Reviewer to ensure compliance with CTR optimization requirements.

Can I edit existing YouTube thumbnails or only create new ones?▼

You can both create thumbnails from scratch and edit existing ones. The Skill applies via the Thumbnail Designer subagent to support thumbnail refinement workflows, including style adjustments, text updates, and focal point optimization for improved click-through performance.

What's the best way to test if my thumbnail will perform well on mobile devices?▼

Mobile-first design is a mandatory principle in this Skill's workflow. Thumbnails are generated and reviewed with mobile viewing prioritized, ensuring legibility at small sizes and visual impact in mobile feeds where most YouTube discovery occurs.