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YouTube Thumbnail Lab v1.0.0

Six thumbnail concepts for a video, each built to be readable at phone size.

No ratings yet 0 downloads

Format: Thumbnails & stills · 16:9
Length: 0:01

Free Free with an account

Paste this into your agent. It connects the CLI if needed, then installs the Skill.

Describe your video or paste the script. It proposes six thumbnail concepts with different emotional angles, composes them with your frames or generated imagery, and checks legibility at the size people actually see.

Content creators Marketers Educators

Updated Sep 24, 2026

What you get

Six 1280×720 thumbnails
A contact sheet for A/B testing

Good fit

YouTube creators and brand channels
Course and webinar covers

Not for

Misleading clickbait that doesn't match the video

About this Skill

/youtube-thumbnail-lab Make thumbnail options for my video about switching to a four-day work week.

Thumbnails decide clicks. This Skill gives you real options to test, not one guess.

How it works

Angles — writes six title-and-image pairings.
Compose — uses your frames or generates imagery after approval.
Check — previews each at 168 px wide and flags unreadable text.
Export — renders 1280×720 PNGs and a contact sheet.

Tips

Three words or fewer on the thumbnail.
Use a real face from your video when you can.

What you need before you start

You bring: Video topic or script and a few frames.
Dependencies: Node.js 20 or newer — required · Image model key — optional
Outside costs: Rendering is local and free. Optional generated shots, voice-over and music are billed by the provider you choose (for example fal, ElevenLabs or Runway) on your own key. The Skill lists every job with an estimate and waits for approval.
Last tested: v1.0.0 — Claude Code / Codex / Cursor