NanoBanana Hack: Create Thumbnails Automatically in 15s

Fully automated image edits with NanoBanana inside Make.com — from downloading the source file, uploading it into the Gemini app environment, running NanoBanana's Generate-a-Response step, to returning a ready Cloudinary URL. Perfect for YouTube thumbnails, LinkedIn posts, or TikTok creatives.

I walk you through the Make scenario that downloads an image via HTTP, uploads it to the Gemini app (Upload File), calls NanoBanana's Generate-a-Response, and returns the edited image. I explain why the regular Image-Generate endpoint isn't enough, how to combine a File message type with a text prompt, set the Response Modality to Image, and ensure the correct MIME type.

Automatically produce clickable, on-brand thumbnails and social images at scale, save time, and keep assets consistent — no AI expert required. Want hands-on help? Book a call via the link under the video.

➡️CHAPTERS
00:01 Intro: NanoBanana Hook
02:03 Model choice issue for NanoBanana
03:52 Response format & Cloudinary upload
04:45 Sub-scenario architecture
05:20 Error handling & scenario inputs/outputs
06:45 Example: Green T‑shirt & Baseball Cap
08:00 Example: Sneaker Ad Photo
09:04 Example: Clickworthy TikTok Thumbnail

Видео NanoBanana Hack: Create Thumbnails Automatically in 15s канала Intelligent Process Automation