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A tiny thumbnail lab for YouTube creators who need sharper hooks, faster drafts, and less staring at a blank canvas.

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AI YouTube thumbnail maker

ThumbAI YouTube thumbnail maker for A/B-ready cover directions

Start with a video hook, YouTube link, reference cover, creator face, video file, or script. ThumbAI works like a thumbnail creator: it turns the brief into three clickable directions you can compare before production.

Signed-in runs use live AI; homepage previews stay lightweight

No assets selected yet

Live generation access

Checking access

The homepage stays free for quick previews. The workbench uses live AI, R2 storage, and generation history, so it needs an account before it can run.

Simple mode

Start with the inputs most creators actually use.

Use this for quick ideation: title, source link, output size, and language. It stays separate from the homepage because this page keeps results, controls, and saved history in one workspace.

ThumbAI

Why use this thumbnail maker

Start for free with lightweight previews, then sign in when you want live AI thumbnail generation.

Use references, faces, scripts, and links so each thumbnail concept has a clearer click reason.

Save A/B-ready results, export watermarked previews, and unlock clean Pro or Max downloads.

A/B-ready preview results

Preview cards appear here before a generation finishes. Signed-in runs will replace them with live AI images.

16:9 · EN
1

curiosity · bigFace

WHAT HAPPENED NEXT?

Curiosity-first

Score 94
Readable textClear subjectMobile-safe
2

curiosity · bigFace

I WAS WRONG

Face-focused

Score 91
Readable textClear subjectMobile-safe
3

curiosity · bigFace

DO THIS FIRST

Text-led

Score 88
Readable textClear subjectMobile-safe

Generation history

Your latest saved generations. Click a card to inspect the brief, export again, or remove it from your account.

No generation jobs yet. Add an idea and run your first thumbnail direction.