Thumelio

Turn your video idea into a polished thumbnail. Generate with AI, customize every text and graphic layer, then export your design in crisp 4K.

Thumelio helps creators transform video ideas into compelling thumbnails and refine every detail before publishing. Describe your video, audience, visual style, emotion, and color direction. Thumelio creates a 16:9 visual with editable headline and subheading layers. Regenerate the result or open the editor to make it your own. CREATE WITH AI • Generate thumbnail visuals from a structured creative brief • Receive editable headline and subheading suggestions • Choose styles, colors, emotions, and compositions • Regenerate concepts before editing
CUSTOMIZE EVERY DETAIL • Move, resize, rotate, hide, and reorder layers • Customize fonts, alignment, fills, outlines, and shadows • Import logos, characters, photos, and other graphics • Undo and redo editor changes
EXPORT IN 4K • Design on a native 16:9 canvas • Export at up to 3840 × 2160 resolution • Save as JPEG or PNG • Keep projects and imported assets on your device
Five AI image generations are included each month after signing in with Apple. Additional generation packs are available as consumable in-app purchases. Purchased generations do not expire. AI generation briefs are processed by Thumelio and Google Gemini to provide the generation service. See our Privacy Policy for details. Thumelio is an independent design tool and is not affiliated with or endorsed by YouTube, Google, or Apple.