Describe your video, drop in your face or product, and ThumbSpark’s AI agent designs scroll-stopping thumbnails in seconds — bold text, clean cut-outs, perfect 16:9.
Use our AI with credits, or bring your own API keys
Powered by leading AI models
Chat with an AI agent that knows what makes people click — then generate, tweak and download in one place.
Try Thumb CornerTell it about your video. It writes the hook, picks the layout and generates finished thumbnails — no design skills needed.
Save your face, logo and products as references in Buckets, then @mention them so every thumbnail stays on-brand.
Ask for five takes, compare them side by side, and refine the winner with a sentence instead of a design tool.
No templates to fight with — just describe what you want.
Step 1
Paste your title or a one-line summary. Add your face, product shots or a style you like.
Step 2
ThumbSpark proposes thumbnail concepts with bold text and strong composition, sized for YouTube.
Step 3
Say “bigger text” or “make me look surprised”, pick your favourite, and download it in full resolution.
Bring your own AI keys and pay once — or let us handle the AI and pay as you go with credits (1 credit = $0.01 of AI usage).
For creators who want it forever
We run the AI for you. Fresh credits every month; unused credits roll over.
Top up whenever you need. Credits never expire.
FAQ
Everything you need to know about ThumbSpark.
Describe your video and get click-worthy thumbnails in seconds.
Start creating