Thumby - AI Thumbnail Maker

VTA GOODS LLC

In-app purchases

About this app

Thumby is the AI agent that does the thumbnail work for you.

Most AI thumbnail tools hand you a blank prompt box. Thumby flips it: you type your video topic in one sentence, optionally attach a reference photo, and the agent does the rest. It picks the right composition for your niche, applies 2026 YouTube CTR rules (one focal subject, three words of text max, readable on a phone screen), writes the image prompt, and returns a 16:9 thumbnail in about a minute.

WHAT YOU GET
• The AI agent writes the prompt for you — you only give a topic and an optional photo
• 18 niche style templates modeled on what top channels actually do
• Built-in 2026 YouTube CTR rules: composition, contrast, mobile readability
• Your face in every style — upload a reference photo and stay recognizable
• Not just YouTube: Instagram posts and stories, Pinterest pins, community posts
• Upscale results to 2K or 4K on demand
• Push notification the moment your render is ready
• You own every output — commercial use included

PRICING
3 free credits on signup, no card required. After that, pay-as-you-go credit packs. No subscription, and credits never expire.

Questions or feedback? [e-mail]

What’s new

First public release: AI thumbnail generation from a one-sentence idea, 18 creator styles, reference photos, 2K/4K upscale, push notification when your render is ready.