Skip to main content
AIDiveForge AIDiveForge
🖼️

Thumbnail A/B Generator

Image & Video · by AIDiveForge · Apr 20, 2026 · Beginner

Generate 5 thumbnail variants for a single video using a brand template and a topic prompt — ready for YouTube multi-variant testing.

🧠 Why it works

YouTube rewards multi-variant thumbnail testing but most creators only make one. Generating five variants that each emphasize a different angle (question, number, emotion, curiosity gap, counter-intuitive claim) gives you something to actually test instead of 'this is my thumbnail.'

⚙️ How it works

  1. Load the brand template — identify the subject slot and text slot coordinates. 2. Generate 5 headline angles from the topic via LLM, each under 5 words and tuned for mobile legibility. 3. For each variant, composite the subject image into the subject slot, render the headline at a legibility-checked font size, and apply an accent color from a rotating palette. 4. Run a quick legibility check — headlines must be readable at 200x120 preview size. 5. Emit the 5 variants as PNG + a caption with the angle rationale for each.

Description

Input: a brand template (PNG with transparent spots for subject and text), a video topic, and an optional subject image. Output: 5 thumbnail variants with different headline angles, color accents, and subject placements — sized to 1280x720 and optimized for mobile-scale legibility.

Install this skill

A Claude skill is a skill.md file with YAML frontmatter and a markdown body. Drop the file into your tool of choice — or pick a different format if you use Cursor, Windsurf, Copilot, or something else.

Download skill.md 
mkdir -p ~/.claude/skills/thumbnail-a-b-generator \
  && curl -L https://aidiveforge.com/skill/thumbnail-a-b-generator.skill-md \
       -o ~/.claude/skills/thumbnail-a-b-generator/skill.md

Save to ~/.claude/skills/thumbnail-a-b-generator/skill.md

Recommended Use

Tools and workflow packs this skill pairs well with. Forge picks are auto-generated from category + capability signals; Community picks are added by people who've used the pairing.

Forge Auto-recommended matches

Tools
Affiliate Disclosure · Privacy · Email Policy · Terms · DMCA