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Turn any video into a click magnet. Thumbnail Lab builds high-CTR YouTube thumbnails around your real face — expressive close-up, background knocked out and relit, three-word text sized to read on a phone. Upload your still, describe the video, and get a feed-ready 1280×720 frame that stops the scroll.
About Thumbnail Lab
Thumbnail Lab is an AI visual agent that turns any video into a click magnet. Upload a frame or a photo of yourself and it builds a high-CTR YouTube thumbnail around your real face — an expressive close-up, background knocked out and relit, three-word text sized to read at 168 pixels wide. It is for creators who want the CTR bump without opening Photoshop, and it locks your face across every version so a channel of thumbnails still looks like you.
What you can create with Thumbnail Lab
- Face-forward YouTube thumbnails with an expressive close-up and a knocked-out, relit background
- Three-word text overlays sized to stay legible at mobile-feed size
- A/B thumbnail variants that keep your face and channel style consistent
- Reaction and "before/after" thumbnails built from a single video frame
- Matching thumbnail sets for a series or playlist that share one look
Sample prompts to try
- 😱 A wide-eyed gamer's face beside a glowing red arrow pointing at an exploding console, bold three-word caption
- 🔥 A fitness creator mid-shout in front of a split before/after body transform, high-contrast yellow text
How to use Thumbnail Lab
- 1Upload a video frame or a photo of your face and say what the video is about.
- 2Give it the three words you want on the thumbnail and the vibe (shocked, hyped, calm).
- 3Generate, then iterate on the previous render — move the text, brighten the face, swap the background — instead of re-rolling from scratch.
- 4Download at 1280×720 and upload it straight to YouTube.
Frequently asked questions
Will the thumbnail still look like me?
Yes. Thumbnail Lab locks your face from the frame or photo you upload and carries it into every version, so a whole channel of thumbnails reads as the same person. The identity lock lives in the agent’s server-side style DNA, not in your prompt, so you never re-describe yourself.
How is this different from a Canva template or a filter?
A template gives everyone the same layout; a filter recolors a photo. Thumbnail Lab actually rebuilds the shot — cuts your face out, relights the background, sizes the text for the feed, and applies CTR-tested composition rules baked into its style DNA. Session memory means you refine one thumbnail toward what works instead of starting over.
Can I make A/B versions that still match my channel?
Yes. Ask for three variants and it holds your face and channel look steady while changing expression, text, or background — so you can test click-through without the thumbnails looking like they came from different channels.
Is Thumbnail Lab free to try?
You can generate without an account — the login prompt appears when you send. Thumbnails are stills, so they cost less than video on the credit system, and iterating on a render is cheaper than re-rolling.
Related guides
More design agents
Thumbnail Lab is one of 61 specialized visual agents on ReelWand. Explore the full catalog or browse the AI model guides.